hv_netvsc: use RCU to fix concurrent rx and queue changes
The receive processing may continue to happen while the
internal network device state is in RCU grace period.
The internal RNDIS structure is associated with the
internal netvsc_device structure; both have the same
RCU lifetime.
Defer freeing all associated parts until after grace
period.
Fixes: 30a734dfed91 ("hv_netvsc: netvsc_teardown_gpadl() split") Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This makes sure that no CPU is still process packets when
the channel is closed.
Fixes: 4af0271664e5 ("netvsc: fix use after free on module removal") Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David Ahern [Tue, 20 Mar 2018 17:06:59 +0000 (10:06 -0700)]
net/ipv6: Handle onlink flag with multipath routes
For multipath routes the ONLINK flag can be specified per nexthop in
rtnh_flags or globally in rtm_flags. Update ip6_route_multipath_add
to consider the ONLINK setting coming from rtnh_flags. Each loop over
nexthops the config for the sibling route is initialized to the global
config and then per nexthop settings overlayed. The flag is 'or'ed into
fib6_config to handle the ONLINK flag coming from either rtm_flags or
rtnh_flags.
Fixes: 550169ad7e8e ("net/ipv6: Add support for onlink flag") Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Guillaume Nault [Tue, 20 Mar 2018 15:49:26 +0000 (16:49 +0100)]
ppp: avoid loop in xmit recursion detection code
We already detect situations where a PPP channel sends packets back to
its upper PPP device. While this is enough to avoid deadlocking on xmit
locks, this doesn't prevent packets from looping between the channel
and the unit.
The problem is that ppp_start_xmit() enqueues packets in ppp->file.xq
before checking for xmit recursion. Therefore, __ppp_xmit_process()
might dequeue a packet from ppp->file.xq and send it on the channel
which, in turn, loops it back on the unit. Then ppp_start_xmit()
queues the packet back to ppp->file.xq and __ppp_xmit_process() picks
it up and sends it again through the channel. Therefore, the packet
will loop between __ppp_xmit_process() and ppp_start_xmit() until some
other part of the xmit path drops it.
For L2TP, we rapidly fill the skb's headroom and pppol2tp_xmit() drops
the packet after a few iterations. But PPTP reallocates the headroom
if necessary, letting the loop run and exhaust the machine resources
(as reported in https://bugzilla.kernel.org/show_bug.cgi?id=199109).
Fix this by letting __ppp_xmit_process() enqueue the skb to
ppp->file.xq, so that we can check for recursion before adding it to
the queue. Now ppp_xmit_process() can drop the packet when recursion is
detected.
__ppp_channel_push() is a bit special. It calls __ppp_xmit_process()
without having any actual packet to send. This is used by
ppp_output_wakeup() to re-enable transmission on the parent unit (for
implementations like ppp_async.c, where the .start_xmit() function
might not consume the skb, leaving it in ppp->xmit_pending and
disabling transmission).
Therefore, __ppp_xmit_process() needs to handle the case where skb is
NULL, dequeuing as many packets as possible from ppp->file.xq.
Reported-by: xu heng <xuheng333@zoho.com> Fixes: eeb1f65d0d19 ("ppp: avoid dealock on recursive xmit") Signed-off-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
When using seg6 in encap mode, we call ipv6_dev_get_saddr() to set the
source address of the outer IPv6 header, in case none was specified.
Using skb->dev can lead to BUG() when it is in an inconsistent state.
This patch uses the net_device attached to the skb's dst instead.
Fixes: 7ab7a75aa79e2 ("ipv6: sr: add support for SRH encapsulation and injection with lwtunnels") Reported-by: Tom Herbert <tom@quantonium.net> Signed-off-by: David Lebrun <dlebrun@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Fixes: 7ab7a75aa79e2 ("ipv6: sr: add support for SRH encapsulation and injection with lwtunnels") Signed-off-by: David Lebrun <dlebrun@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 22 Mar 2018 16:02:50 +0000 (12:02 -0400)]
Merge branch 'aquantia-fixes'
Igor Russkikh says:
====================
Aquantia atlantic hot fixes 03-2018
This is a set of atlantic driver hot fixes for various areas:
Some issues with hardware reset covered,
Fixed napi_poll flood happening on some traffic conditions,
Allow system to change MAC address on live device,
Add pci shutdown handler.
patch v2:
- reverse christmas tree
- remove driver private parameter, replacing it with define.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Igor Russkikh [Tue, 20 Mar 2018 11:40:36 +0000 (14:40 +0300)]
net: aquantia: Implement pci shutdown callback
We should close link and all NIC operations during shutdown.
On some systems graceful reboot never closes NIC interface on its own,
but only indicates pci device shutdown. Without explicit handler, NIC
rx rings continued to transfer DMA data into prepared buffers while CPU
rebooted already. That caused memory corruptions on soft reboot.
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
We should report to napi full budget only when we have more job to do.
Before this fix, on any tx queue cleanup we forced napi to do poll again.
Thats a waste of cpu resources and caused storming with napi polls when
there was at least one tx on each interrupt.
With this fix we report full budget only when there is more job on TX
to do. Or, as before, when rx budget was fully consumed.
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Igor Russkikh [Tue, 20 Mar 2018 11:40:33 +0000 (14:40 +0300)]
net: aquantia: Change inefficient wait loop on fw data reads
B1 hardware changes behavior of mailbox interface, it has busy bit
always raised. Data ready condition should be detected by increment
of address register.
Old code has empty `for` loop, and that caused cpu overloads on B1
hardware. aq_nic_service_timer_cb consumed ~100ms because of that.
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Igor Russkikh [Tue, 20 Mar 2018 11:40:31 +0000 (14:40 +0300)]
net: aquantia: Fix hardware reset when SPI may rarely hangup
Under some circumstances (notably using thunderbolt interface) SPI
on chip reset may be in active transaction.
Here we forcibly cleanup SPI to prevent possible hangups.
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 22 Mar 2018 15:52:31 +0000 (11:52 -0400)]
Merge branch 's390-qeth-fixes'
Julian Wiedmann says:
====================
s390/qeth: fixes 2018-03-20
Please apply one final set of qeth patches for 4.16.
All of these fix long-standing bugs, so please queue them up for -stable
as well.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Julian Wiedmann [Tue, 20 Mar 2018 06:59:15 +0000 (07:59 +0100)]
s390/qeth: on channel error, reject further cmd requests
When the IRQ handler determines that one of the cmd IO channels has
failed and schedules recovery, block any further cmd requests from
being submitted. The request would inevitably stall, and prevent the
recovery from making progress until the request times out.
This sort of error was observed after Live Guest Relocation, where
the pending IO on the READ channel intentionally gets terminated to
kick-start recovery. Simultaneously the guest executed SIOCETHTOOL,
triggering qeth to issue a QUERY CARD INFO command. The command
then stalled in the inoperabel WRITE channel.
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Julian Wiedmann [Tue, 20 Mar 2018 06:59:14 +0000 (07:59 +0100)]
s390/qeth: lock read device while queueing next buffer
For calling ccw_device_start(), issue_next_read() needs to hold the
device's ccwlock.
This is satisfied for the IRQ handler path (where qeth_irq() gets called
under the ccwlock), but we need explicit locking for the initial call by
the MPC initialization.
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Julian Wiedmann [Tue, 20 Mar 2018 06:59:13 +0000 (07:59 +0100)]
s390/qeth: when thread completes, wake up all waiters
qeth_wait_for_threads() is potentially called by multiple users, make
sure to notify all of them after qeth_clear_thread_running_bit()
adjusted the thread_running_mask. With no timeout, callers would
otherwise stall.
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Fix it by free'ing the netdev straight after unregistering. This also
fixes the sysfs-driven layer switch case (qeth_dev_layer2_store()),
where the need to free the current netdevice was not considered at all.
Note that free_netdev() takes care of the netif_napi_del() for us too.
Fixes: a5a090d6ef88 ("qeth: new qeth device driver") Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
====================
net: phy: Add general dummy stubs for MMD register access
v2:
As suggested by Andrew:
- Add general dummy stubs
- Also use that for the micrel phy
This patch series fix the Ethernet broken on the mpc8315erdb board introduced
by commit cc398e2f4fa4 ("gianfar: Disable EEE autoneg by default").
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Kevin Hao [Tue, 20 Mar 2018 01:44:53 +0000 (09:44 +0800)]
net: phy: realtek: Use the dummy stubs for MMD register access for rtl8211b
The Ethernet on mpc8315erdb is broken since commit cc398e2f4fa4
("gianfar: Disable EEE autoneg by default"). The reason is that
even though the rtl8211b doesn't support the MMD extended registers
access, it does return some random values if we trying to access
the MMD register via indirect method. This makes it seem that the
EEE is supported by this phy device. And the subsequent writing to
the MMD registers does cause the phy malfunction. So use the dummy
stubs for the MMD register access to fix this issue.
Fixes: cc398e2f4fa4 ("gianfar: Disable EEE autoneg by default") Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Kevin Hao [Tue, 20 Mar 2018 01:44:52 +0000 (09:44 +0800)]
net: phy: Add general dummy stubs for MMD register access
For some phy devices, even though they don't support the MMD extended
register access, it does have some side effect if we are trying to
read/write the MMD registers via indirect method. So introduce general
dummy stubs for MMD register access which these devices can use to avoid
such side effect.
Fixes: cc398e2f4fa4 ("gianfar: Disable EEE autoneg by default") Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 21 Mar 2018 22:12:46 +0000 (18:12 -0400)]
Merge branch 'net-sched-action-idr-leak'
Davide Caratti says:
====================
fix idr leak in actions
This series fixes situations where a temporary failure to install a TC
action results in the permanent impossibility to reuse the configured
value of 'index'.
Thanks to Cong Wang for the initial review.
v2: fix build error in act_ipt.c, reported by kbuild test robot
====================
Acked-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Mon, 19 Mar 2018 14:31:28 +0000 (15:31 +0100)]
net/sched: fix idr leak in the error path of tcf_skbmod_init()
tcf_skbmod_init() can fail after the idr has been successfully reserved.
When this happens, every subsequent attempt to configure skbmod rules
using the same idr value will systematically fail with -ENOSPC, unless
the first attempt was done using the 'replace' keyword:
# tc action add action skbmod swap mac index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action add action skbmod swap mac index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
# tc action add action skbmod swap mac index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
...
Fix this in tcf_skbmod_init(), ensuring that tcf_idr_release() is called
on the error path when the idr has been reserved, but not yet inserted.
Also, don't test 'ovr' in the error path, to avoid a 'replace' failure
implicitly become a 'delete' that leaks refcount in act_skbmod module:
# rmmod act_skbmod; modprobe act_skbmod
# tc action add action skbmod swap mac index 100
# tc action add action skbmod swap mac continue index 100
RTNETLINK answers: File exists
We have an error talking to the kernel
# tc action replace action skbmod swap mac continue index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action list action skbmod
#
# rmmod act_skbmod
rmmod: ERROR: Module act_skbmod is in use
Fixes: 7b3c52a50e8a ("net/sched: Change act_api and act_xxx modules to use IDR") Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Mon, 19 Mar 2018 14:31:27 +0000 (15:31 +0100)]
net/sched: fix idr leak in the error path of tcf_vlan_init()
tcf_vlan_init() can fail after the idr has been successfully reserved.
When this happens, every subsequent attempt to configure vlan rules using
the same idr value will systematically fail with -ENOSPC, unless the first
attempt was done using the 'replace' keyword.
# tc action add action vlan pop index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action add action vlan pop index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
# tc action add action vlan pop index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
...
Fix this in tcf_vlan_init(), ensuring that tcf_idr_release() is called on
the error path when the idr has been reserved, but not yet inserted. Also,
don't test 'ovr' in the error path, to avoid a 'replace' failure implicitly
become a 'delete' that leaks refcount in act_vlan module:
# rmmod act_vlan; modprobe act_vlan
# tc action add action vlan push id 5 index 100
# tc action replace action vlan push id 7 index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action list action vlan
#
# rmmod act_vlan
rmmod: ERROR: Module act_vlan is in use
Fixes: 4375cee5b9cc ("act_vlan: VLAN action rewrite to use RCU lock/unlock and update") Fixes: 7b3c52a50e8a ("net/sched: Change act_api and act_xxx modules to use IDR") Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Mon, 19 Mar 2018 14:31:26 +0000 (15:31 +0100)]
net/sched: fix idr leak in the error path of __tcf_ipt_init()
__tcf_ipt_init() can fail after the idr has been successfully reserved.
When this happens, subsequent attempts to configure xt/ipt rules using
the same idr value systematically fail with -ENOSPC:
# tc action add action xt -j LOG --log-prefix test1 index 100
tablename: mangle hook: NF_IP_POST_ROUTING
target: LOG level warning prefix "test1" index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
Command "(null)" is unknown, try "tc actions help".
# tc action add action xt -j LOG --log-prefix test1 index 100
tablename: mangle hook: NF_IP_POST_ROUTING
target: LOG level warning prefix "test1" index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
Command "(null)" is unknown, try "tc actions help".
# tc action add action xt -j LOG --log-prefix test1 index 100
tablename: mangle hook: NF_IP_POST_ROUTING
target: LOG level warning prefix "test1" index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
...
Fix this in the error path of __tcf_ipt_init(), calling tcf_idr_release()
in place of tcf_idr_cleanup(). Since tcf_ipt_release() can now be called
when tcfi_t is NULL, we also need to protect calls to ipt_destroy_target()
to avoid NULL pointer dereference.
Fixes: 7b3c52a50e8a ("net/sched: Change act_api and act_xxx modules to use IDR") Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Mon, 19 Mar 2018 14:31:25 +0000 (15:31 +0100)]
net/sched: fix idr leak in the error path of tcp_pedit_init()
tcf_pedit_init() can fail to allocate 'keys' after the idr has been
successfully reserved. When this happens, subsequent attempts to configure
a pedit rule using the same idr value systematically fail with -ENOSPC:
# tc action add action pedit munge ip ttl set 63 index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action add action pedit munge ip ttl set 63 index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
# tc action add action pedit munge ip ttl set 63 index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
...
Fix this in the error path of tcf_act_pedit_init(), calling
tcf_idr_release() in place of tcf_idr_cleanup().
Fixes: 7b3c52a50e8a ("net/sched: Change act_api and act_xxx modules to use IDR") Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Mon, 19 Mar 2018 14:31:24 +0000 (15:31 +0100)]
net/sched: fix idr leak in the error path of tcf_act_police_init()
tcf_act_police_init() can fail after the idr has been successfully
reserved (e.g., qdisc_get_rtab() may return NULL). When this happens,
subsequent attempts to configure a police rule using the same idr value
systematiclly fail with -ENOSPC:
# tc action add action police rate 1000 burst 1000 drop index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action add action police rate 1000 burst 1000 drop index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
# tc action add action police rate 1000 burst 1000 drop index 100
RTNETLINK answers: No space left on device
...
Fix this in the error path of tcf_act_police_init(), calling
tcf_idr_release() in place of tcf_idr_cleanup().
Fixes: 7b3c52a50e8a ("net/sched: Change act_api and act_xxx modules to use IDR") Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Mon, 19 Mar 2018 14:31:23 +0000 (15:31 +0100)]
net/sched: fix idr leak in the error path of tcf_simp_init()
if the kernel fails to duplicate 'sdata', creation of a new action fails
with -ENOMEM. However, subsequent attempts to install the same action
using the same value of 'index' systematically fail with -ENOSPC, and
that value of 'index' will no more be usable by act_simple, until rmmod /
insmod of act_simple.ko is done:
# tc actions add action simple sdata hello index 100
# tc actions list action simple
action order 0: Simple <hello>
index 100 ref 1 bind 0
# tc actions flush action simple
# tc actions add action simple sdata hello index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc actions flush action simple
# tc actions add action simple sdata hello index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
# tc actions add action simple sdata hello index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
...
Fix this in the error path of tcf_simp_init(), calling tcf_idr_release()
in place of tcf_idr_cleanup().
Fixes: 7b3c52a50e8a ("net/sched: Change act_api and act_xxx modules to use IDR") Suggested-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Mon, 19 Mar 2018 14:31:22 +0000 (15:31 +0100)]
net/sched: fix idr leak on the error path of tcf_bpf_init()
when the following command sequence is entered
# tc action add action bpf bytecode '4,40 0 0 12,31 0 1 2048,6 0 0 262144,6 0 0 0' index 100
RTNETLINK answers: Invalid argument
We have an error talking to the kernel
# tc action add action bpf bytecode '4,40 0 0 12,21 0 1 2048,6 0 0 262144,6 0 0 0' index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
act_bpf correctly refuses to install the first TC rule, because 31 is not
a valid instruction. However, it refuses to install the second TC rule,
even if the BPF code is correct. Furthermore, it's no more possible to
install any other rule having the same value of 'index' until act_bpf
module is unloaded/inserted again. After the idr has been reserved, call
tcf_idr_release() instead of tcf_idr_cleanup(), to fix this issue.
Fixes: 7b3c52a50e8a ("net/sched: Change act_api and act_xxx modules to use IDR") Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Trivial fix to spelling mistake in BNX2X_ERR error message text
Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Sudarsana Kalluru <Sudarsana.Kalluru@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
The following pull-request contains BPF updates for your *net* tree.
The main changes are:
1) Follow-up fix to the fault injection framework to prevent jump
optimization on the kprobe by installing a dummy post-handler,
from Masami.
2) Drop bpf_perf_prog_read_value helper from tracepoint type programs
which was mistakenly added there and would otherwise crash due to
wrong input context, from Yonghong.
3) Fix a crash in BPF fs when compiled with clang. Code appears to
be fine just that clang tries to overly aggressive optimize in
non C conform ways, therefore fix the kernel's Makefile to
generally prevent such issues, from Daniel.
4) Skip unnecessary capability checks in bpf syscall, which is otherwise
triggering unnecessary security hooks on capability checking and
causing false alarms on unprivileged processes trying to access
CAP_SYS_ADMIN restricted infra, from Chenbo.
5) Fix the test_bpf.ko module when CONFIG_BPF_JIT_ALWAYS_ON is set
with regards to a test case that is really just supposed to fail
on x8_64 JIT but not others, from Thadeu.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Borkmann [Wed, 21 Mar 2018 00:18:24 +0000 (01:18 +0100)]
kbuild: disable clang's default use of -fmerge-all-constants
Prasad reported that he has seen crashes in BPF subsystem with netd
on Android with arm64 in the form of (note, the taint is unrelated):
[ 4134.721483] Unable to handle kernel paging request at virtual address 800000001
[ 4134.820925] Mem abort info:
[ 4134.901283] Exception class = DABT (current EL), IL = 32 bits
[ 4135.016736] SET = 0, FnV = 0
[ 4135.119820] EA = 0, S1PTW = 0
[ 4135.201431] Data abort info:
[ 4135.301388] ISV = 0, ISS = 0x00000021
[ 4135.359599] CM = 0, WnR = 0
[ 4135.470873] user pgtable: 4k pages, 39-bit VAs, pgd = ffffffe39b946000
[ 4135.499757] [0000000800000001] *pgd=0000000000000000, *pud=0000000000000000
[ 4135.660725] Internal error: Oops: 96000021 [#1] PREEMPT SMP
[ 4135.674610] Modules linked in:
[ 4135.682883] CPU: 5 PID: 1260 Comm: netd Tainted: G S W 4.14.19+ #1
[ 4135.716188] task: ffffffe39f4aa380 task.stack: ffffff801d4e0000
[ 4135.731599] PC is at bpf_prog_add+0x20/0x68
[ 4135.741746] LR is at bpf_prog_inc+0x20/0x2c
[ 4135.751788] pc : [<ffffff94ab7ad584>] lr : [<ffffff94ab7ad638>] pstate: 60400145
[ 4135.769062] sp : ffffff801d4e3ce0
[...]
[ 4136.258315] Process netd (pid: 1260, stack limit = 0xffffff801d4e0000)
[ 4136.273746] Call trace:
[...]
[ 4136.442494] 3ca0: ffffff94ab7ad5840000000060400145ffffffe3a01bf8f80000000000000006
[ 4136.460936] 3cc0: 0000008000000000ffffff94ab844204ffffff801d4e3cf0ffffff94ab7ad584
[ 4136.479241] [<ffffff94ab7ad584>] bpf_prog_add+0x20/0x68
[ 4136.491767] [<ffffff94ab7ad638>] bpf_prog_inc+0x20/0x2c
[ 4136.504536] [<ffffff94ab7b5d08>] bpf_obj_get_user+0x204/0x22c
[ 4136.518746] [<ffffff94ab7ade68>] SyS_bpf+0x5a8/0x1a88
Android's netd was basically pinning the uid cookie BPF map in BPF
fs (/sys/fs/bpf/traffic_cookie_uid_map) and later on retrieving it
again resulting in above panic. Issue is that the map was wrongly
identified as a prog! Above kernel was compiled with clang 4.0,
and it turns out that clang decided to merge the bpf_prog_iops and
bpf_map_iops into a single memory location, such that the two i_ops
could then not be distinguished anymore.
Reason for this miscompilation is that clang has the more aggressive
-fmerge-all-constants enabled by default. In fact, clang source code
has a comment about it in lib/AST/ExprConstant.cpp on why it is okay
to do so:
Pointers with different bases cannot represent the same object.
(Note that clang defaults to -fmerge-all-constants, which can
lead to inconsistent results for comparisons involving the address
of a constant; this generally doesn't matter in practice.)
The issue never appeared with gcc however, since gcc does not enable
-fmerge-all-constants by default and even *explicitly* states in
it's option description that using this flag results in non-conforming
behavior, quote from man gcc:
Languages like C or C++ require each variable, including multiple
instances of the same variable in recursive calls, to have distinct
locations, so using this option results in non-conforming behavior.
There are also various clang bug reports open on that matter [1],
where clang developers acknowledge the non-conforming behavior,
and refer to disabling it with -fno-merge-all-constants. But even
if this gets fixed in clang today, there are already users out there
that triggered this. Thus, fix this issue by explicitly adding
-fno-merge-all-constants to the kernel's Makefile to generically
disable this optimization, since potentially other places in the
kernel could subtly break as well.
Note, there is also a flag called -fmerge-constants (not supported
by clang), which is more conservative and only applies to strings
and it's enabled in gcc's -O/-O2/-O3/-Os optimization levels. In
gcc's code, the two flags -fmerge-{all-,}constants share the same
variable internally, so when disabling it via -fno-merge-all-constants,
then we really don't merge any const data (e.g. strings), and text
size increases with gcc (14,927,214 -> 14,942,646 for vmlinux.o).
Chenbo Feng [Tue, 20 Mar 2018 00:57:27 +0000 (17:57 -0700)]
bpf: skip unnecessary capability check
The current check statement in BPF syscall will do a capability check
for CAP_SYS_ADMIN before checking sysctl_unprivileged_bpf_disabled. This
code path will trigger unnecessary security hooks on capability checking
and cause false alarms on unprivileged process trying to get CAP_SYS_ADMIN
access. This can be resolved by simply switch the order of the statement
and CAP_SYS_ADMIN is not required anyway if unprivileged bpf syscall is
allowed.
Signed-off-by: Chenbo Feng <fengc@google.com> Acked-by: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Yonghong Song [Tue, 20 Mar 2018 18:19:17 +0000 (11:19 -0700)]
trace/bpf: remove helper bpf_perf_prog_read_value from tracepoint type programs
Commit 4b58a9c1e411 ("bpf: add helper bpf_perf_prog_read_value")
added helper bpf_perf_prog_read_value so that perf_event type program
can read event counter and enabled/running time.
This commit, however, introduced a bug which allows this helper
for tracepoint type programs. This is incorrect as bpf_perf_prog_read_value
needs to access perf_event through its bpf_perf_event_data_kern type context,
which is not available for tracepoint type program.
This patch fixed the issue by separating bpf_func_proto between tracepoint
and perf_event type programs and removed bpf_perf_prog_read_value
from tracepoint func prototype.
Fixes: 4b58a9c1e411 ("bpf: add helper bpf_perf_prog_read_value") Reported-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
test_bpf: Fix testing with CONFIG_BPF_JIT_ALWAYS_ON=y on other arches
Function bpf_fill_maxinsns11 is designed to not be able to be JITed on
x86_64. So, it fails when CONFIG_BPF_JIT_ALWAYS_ON=y, and
commit 256eb99f4750 ("bpf: fix selftests/bpf test_kmod.sh failure when
CONFIG_BPF_JIT_ALWAYS_ON=y") makes sure that failure is detected on that
case.
However, it does not fail on other architectures, which have a different
JIT compiler design. So, test_bpf has started to fail to load on those.
After this fix, test_bpf loads fine on both x86_64 and ppc64el.
Fixes: 256eb99f4750 ("bpf: fix selftests/bpf test_kmod.sh failure when CONFIG_BPF_JIT_ALWAYS_ON=y") Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com> Reviewed-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Stefano Brivio [Mon, 19 Mar 2018 10:24:58 +0000 (11:24 +0100)]
ipv6: old_dport should be a __be16 in __ip6_datagram_connect()
Fixes: b5e1604d26f8 ("net: ipv6: keep sk status consistent after datagram connect failure") Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 20 Mar 2018 16:42:36 +0000 (12:42 -0400)]
Merge tag 'linux-can-fixes-for-4.16-20180319' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can
Marc Kleine-Budde says:
====================
pull-request: can 2018-03-19
this is a pull reqeust of one patch for net/master.
The patch is by Andri Yngvason and fixes a potential use-after-free bug
in the cc770 driver introduced in the previous pull-request.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Igor Pylypiv <igor.pylypiv@gmail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
net: ethernet: arc: Fix a potential memory leak if an optional regulator is deferred
If the optional regulator is deferred, we must release some resources.
They will be re-allocated when the probe function will be called again.
Fixes: 9843bb137d0f ("ethernet: arc: Add support for Rockchip SoC layer device tree bindings") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
The current code performs unneeded free. Remove the redundant skb freeing
during the error path.
Fixes: 653f98759263 ("devlink: Support for pipeline debug (dpipe)") Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 20 Mar 2018 01:14:27 +0000 (21:14 -0400)]
Merge branch 'phy-relax-error-checking'
Grygorii Strashko says:
====================
net: phy: relax error checking when creating sysfs link netdev->phydev
Some ethernet drivers (like TI CPSW) may connect and manage >1 Net PHYs per
one netdevice, as result such drivers will produce warning during system
boot and fail to connect second phy to netdevice when PHYLIB framework
will try to create sysfs link netdev->phydev for second PHY
in phy_attach_direct(), because sysfs link with the same name has been
created already for the first PHY.
As result, second CPSW external port will became unusable.
This regression was introduced by commits: 1d1120795332 ("net: phy: Create sysfs reciprocal links for attached_dev/phydev" ff90d2c75cd6 ("net: phy: Relax error checking on sysfs_create_link()"
Patch 1: exports sysfs_create_link_nowarn() function as preparation for Patch 2.
Patch 2: relaxes error checking when PHYLIB framework is creating sysfs
link netdev->phydev in phy_attach_direct(), suppresses warning by using
sysfs_create_link_nowarn() and adds error message instead, so links creation
failure is not fatal any more and system can continue working,
which fixes TI CPSW issue and makes boot logs accessible
in case of NFS boot, for example.
net: phy: relax error checking when creating sysfs link netdev->phydev
Some ethernet drivers (like TI CPSW) may connect and manage >1 Net PHYs per
one netdevice, as result such drivers will produce warning during system
boot and fail to connect second phy to netdevice when PHYLIB framework
will try to create sysfs link netdev->phydev for second PHY
in phy_attach_direct(), because sysfs link with the same name has been
created already for the first PHY. As result, second CPSW external
port will became unusable.
Fix it by relaxing error checking when PHYLIB framework is creating sysfs
link netdev->phydev in phy_attach_direct(), suppressing warning by using
sysfs_create_link_nowarn() and adding error message instead.
After this change links (phy->netdev and netdev->phy) creation failure is not
fatal any more and system can continue working, which fixes TI CPSW issue.
Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Andrew Lunn <andrew@lunn.ch> Fixes: ff90d2c75cd6 ("net: phy: Relax error checking on sysfs_create_link()") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
The sysfs_create_link_nowarn() is going to be used in phylib framework in
subsequent patch which can be built as module. Hence, export
sysfs_create_link_nowarn() to avoid build errors.
Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Andrew Lunn <andrew@lunn.ch> Fixes: ff90d2c75cd6 ("net: phy: Relax error checking on sysfs_create_link()") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Sven Eckelmann [Fri, 16 Mar 2018 20:14:32 +0000 (21:14 +0100)]
batman-adv: Fix skbuff rcsum on packet reroute
batadv_check_unicast_ttvn may redirect a packet to itself or another
originator. This involves rewriting the ttvn and the destination address in
the batadv unicast header. These field were not yet pulled (with skb rcsum
update) and thus any change to them also requires a change in the receive
checksum.
Reported-by: Matthias Schiffer <mschiffer@universe-factory.net> Fixes: 81eee4f2876f ("batman-adv: improved client announcement mechanism") Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Ronak Doshi [Fri, 16 Mar 2018 21:49:19 +0000 (14:49 -0700)]
vmxnet3: use correct flag to indicate LRO feature
'Commit 1520c5c54f0e ("vmxnet3: Changes for vmxnet3 adapter version 2
(fwd)")' introduced a flag "lro" in structure vmxnet3_adapter which is
used to indicate whether LRO is enabled or not. However, the patch
did not set the flag and hence it was never exercised.
So, when LRO is enabled, it resulted in poor TCP performance due to
delayed acks. This issue is seen with packets which are larger than
the mss getting a delayed ack rather than an immediate ack, thus
resulting in high latency.
This patch removes the lro flag and directly uses device features
against NETIF_F_LRO to check if lro is enabled.
Fixes: 1520c5c54f0e ("vmxnet3: Changes for vmxnet3 adapter version 2 (fwd)") Reported-by: Rachel Lunnon <rachel_lunnon@stormagic.com> Signed-off-by: Ronak Doshi <doshir@vmware.com> Acked-by: Shrikrishna Khare <skhare@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ronak Doshi [Fri, 16 Mar 2018 21:47:54 +0000 (14:47 -0700)]
vmxnet3: avoid xmit reset due to a race in vmxnet3
The field txNumDeferred is used by the driver to keep track of the number
of packets it has pushed to the emulation. The driver increments it on
pushing the packet to the emulation and the emulation resets it to 0 at
the end of the transmit.
There is a possibility of a race either when (a) ESX is under heavy load or
(b) workload inside VM is of low packet rate.
This race results in xmit hangs when network coalescing is disabled. This
change creates a local copy of txNumDeferred and uses it to perform ring
arithmetic.
Reported-by: Noriho Tanaka <ntanaka@vmware.com> Signed-off-by: Ronak Doshi <doshir@vmware.com> Acked-by: Shrikrishna Khare <skhare@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sat, 17 Mar 2018 23:53:29 +0000 (19:53 -0400)]
Merge branch 'tcf_foo_init-NULL-deref'
Davide Caratti says:
====================
net/sched: fix NULL dereference in the error path of .init()
with several TC actions it's possible to see NULL pointer dereference,
when the .init() function calls tcf_idr_alloc(), fails at some point and
then calls tcf_idr_release(): this series fixes all them introducing
non-NULL tests in the .cleanup() function.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Thu, 15 Mar 2018 23:00:57 +0000 (00:00 +0100)]
net/sched: fix NULL dereference on the error path of tcf_skbmod_init()
when the following command
# tc action replace action skbmod swap mac index 100
is run for the first time, and tcf_skbmod_init() fails to allocate struct
tcf_skbmod_params, tcf_skbmod_cleanup() calls kfree_rcu(NULL), thus
causing the following error:
Davide Caratti [Thu, 15 Mar 2018 23:00:56 +0000 (00:00 +0100)]
net/sched: fix NULL dereference in the error path of tcf_sample_init()
when the following command
# tc action add action sample rate 100 group 100 index 100
is run for the first time, and psample_group_get(100) fails to create a
new group, tcf_sample_cleanup() calls psample_group_put(NULL), thus
causing the following error:
Davide Caratti [Thu, 15 Mar 2018 23:00:55 +0000 (00:00 +0100)]
net/sched: fix NULL dereference in the error path of tunnel_key_init()
when the following command
# tc action add action tunnel_key unset index 100
is run for the first time, and tunnel_key_init() fails to allocate struct
tcf_tunnel_key_params, tunnel_key_release() dereferences NULL pointers.
This causes the following error:
Davide Caratti [Thu, 15 Mar 2018 23:00:54 +0000 (00:00 +0100)]
net/sched: fix NULL dereference in the error path of tcf_csum_init()
when the following command
# tc action add action csum udp continue index 100
is run for the first time, and tcf_csum_init() fails allocating struct
tcf_csum, tcf_csum_cleanup() calls kfree_rcu(NULL,...). This causes the
following error:
fix this in tcf_csum_cleanup(), ensuring that kfree_rcu(param, ...) is
called only when param is not NULL.
Fixes: 46e78e7406dc ("net/sched: act_csum: don't use spinlock in the fast path") Signed-off-by: Davide Caratti <dcaratti@redhat.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Thu, 15 Mar 2018 23:00:53 +0000 (00:00 +0100)]
net/sched: fix NULL dereference in the error path of tcf_vlan_init()
when the following command
# tc actions replace action vlan pop index 100
is run for the first time, and tcf_vlan_init() fails allocating struct
tcf_vlan_params, tcf_vlan_cleanup() calls kfree_rcu(NULL, ...). This causes
the following error:
fix this in tcf_vlan_cleanup(), ensuring that kfree_rcu(p, ...) is called
only when p is not NULL.
Fixes: 4375cee5b9cc ("act_vlan: VLAN action rewrite to use RCU lock/unlock and update") Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: Manish Kurup <manish.kurup@verizon.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
SZ Lin (林上智) [Thu, 15 Mar 2018 16:56:01 +0000 (00:56 +0800)]
net: ethernet: ti: cpsw: add check for in-band mode setting with RGMII PHY interface
According to AM335x TRM[1] 14.3.6.2, AM437x TRM[2] 15.3.6.2 and
DRA7 TRM[3] 24.11.4.8.7.3.3, in-band mode in EXT_EN(bit18) register is only
available when PHY is configured in RGMII mode with 10Mbps speed. It will
cause some networking issues without RGMII mode, such as carrier sense
errors and low throughput. TI also mentioned this issue in their forum[4].
This patch adds the check mechanism for PHY interface with RGMII interface
type, the in-band mode can only be set in RGMII mode with 10Mbps speed.
Matthias Brugger [Thu, 15 Mar 2018 16:54:20 +0000 (17:54 +0100)]
net: hns: Fix ethtool private flags
The driver implementation returns support for private flags, while
no private flags are present. When asked for the number of private
flags it returns the number of statistic flag names.
Fix this by returning EOPNOTSUPP for not implemented ethtool flags.
Signed-off-by: Matthias Brugger <mbrugger@suse.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Thu, 15 Mar 2018 12:49:56 +0000 (14:49 +0200)]
mlxsw: spectrum_buffers: Set a minimum quota for CPU port traffic
In commit aa17a9ec16aa ("mlxsw: spectrum: Allow packets to be trapped
from any PG") I fixed a problem where packets could not be trapped to
the CPU due to exceeded shared buffer quotas. The mentioned commit
explains the problem in detail.
The problem was fixed by assigning a minimum quota for the CPU port and
the traffic class used for scheduling traffic to the CPU.
However, commit 466937d20709 ("mlxsw: Create a different trap group list
for each device") assigned different traffic classes to different
packet types and rendered the fix useless.
Fix the problem by assigning a minimum quota for the CPU port and all
the traffic classes that are currently in use.
Fixes: 466937d20709 ("mlxsw: Create a different trap group list for each device") Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reported-by: Eddie Shklaer <eddies@mellanox.com> Tested-by: Eddie Shklaer <eddies@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Fixes: 0ad787760556 ("net: sched: pfifo_fast use skb_array") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot+ed43b6903ab968b16f54@syzkaller.appspotmail.com Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us> Acked-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
batman-adv: fix header size check in batadv_dbg_arp()
Checking for 0 is insufficient: when an SKB without a batadv header, but
with a VLAN header is received, hdr_size will be 4, making the following
code interpret the Ethernet header as a batadv header.
Fixes: 3454fb64112e ("batman-adv: make the Distributed ARP Table vlan aware") Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
batadv_check_unicast_ttvn() calls skb_cow(), so pointers into the SKB data
must be (re)set after calling it. The ethhdr variable is dropped
altogether.
Fixes: 18269d184f55 ("batman-adv: add UNICAST_4ADDR packet type") Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Andrew Lunn [Fri, 16 Mar 2018 17:03:46 +0000 (18:03 +0100)]
net: dsa: mv88e6xxx: Fix binding documentation for MDIO busses
The MDIO busses are switch properties and so should be inside the
switch node. Fix the examples in the binding document.
Reported-by: 尤晓杰 <yxj790222@163.com> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Fixes: 3a17ca7229f7 ("net: dsa: mv88e6xxx: Support multiple MDIO busses") Signed-off-by: David S. Miller <davem@davemloft.net>
skbuff: Fix not waking applications when errors are enqueued
When errors are enqueued to the error queue via sock_queue_err_skb()
function, it is possible that the waiting application is not notified.
Calling 'sk->sk_data_ready()' would not notify applications that
selected only POLLERR events in poll() (for example).
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: Randy E. Witt <randy.e.witt@intel.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Nicolas Dichtel [Wed, 14 Mar 2018 20:10:23 +0000 (21:10 +0100)]
netlink: avoid a double skb free in genlmsg_mcast()
nlmsg_multicast() consumes always the skb, thus the original skb must be
freed only when this function is called with a clone.
Fixes: 7413d5044647 ("netlink: ensure to loop over all netns in genlmsg_multicast_allns()") Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Michal Kalderon [Wed, 14 Mar 2018 12:56:53 +0000 (14:56 +0200)]
qede: Fix qedr link update
Link updates were not reported to qedr correctly.
Leading to cases where a link could be down, but qedr
would see it as up.
In addition, once qede was loaded, link state would be up,
regardless of the actual link state.
Signed-off-by: Michal Kalderon <michal.kalderon@cavium.com> Signed-off-by: Ariel Elior <ariel.elior@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Michal Kalderon [Wed, 14 Mar 2018 12:49:28 +0000 (14:49 +0200)]
qed: Fix non TCP packets should be dropped on iWARP ll2 connection
FW workaround. The iWARP LL2 connection did not expect TCP packets
to arrive on it's connection. The fix drops any non-tcp packets
Fixes 84bb158 ("qed: iWARP CM - setup a ll2 connection for handling
SYN packets")
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com> Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Michal Kalderon [Wed, 14 Mar 2018 12:49:27 +0000 (14:49 +0200)]
qed: Fix MPA unalign flow in case header is split across two packets.
There is a corner case in the MPA unalign flow where a FPDU header is
split over two tcp segments. The length of the first fragment in this
case was not initialized properly and should be '1'
Fixes: 5402451d ("qed: Add support for MPA header being split over two tcp packets") Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com> Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
There is no need for complex checking between the last consumed index
and current consumed index, a simple subtraction will do.
This also eliminates the possibility of a permanent transmit queue stall
under the following conditions:
- one CPU bursts ring->size worth of traffic (up to 256 buffers), to the
point where we run out of free descriptors, so we stop the transmit
queue at the end of bcm_sysport_xmit()
- because of our locking, we have the transmit process disable
interrupts which means we can be blocking the TX reclamation process
- when TX reclamation finally runs, we will be computing the difference
between ring->c_index (last consumed index by SW) and what the HW
reports through its register
- this register is masked with (ring->size - 1) = 0xff, which will lead
to stripping the upper bits of the index (register is 16-bits wide)
- we will be computing last_tx_cn as 0, which means there is no work to
be done, and we never wake-up the transmit queue, leaving it
permanently disabled
A practical example is e.g: ring->c_index aka last_c_index = 12, we
pushed 256 entries, HW consumer index = 268, we mask it with 0xff = 12,
so last_tx_cn == 0, nothing happens.
Fixes: 2912eb7400ef ("net: systemport: add Broadcom SYSTEMPORT Ethernet MAC driver") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Tom Herbert [Tue, 13 Mar 2018 19:01:43 +0000 (12:01 -0700)]
kcm: lock lower socket in kcm_attach
Need to lock lower socket in order to provide mutual exclusion
with kcm_unattach.
v2: Add Reported-by for syzbot
Fixes: 8d086dd1f7276cf31364af8e ("kcm: Kernel Connection Multiplexor module") Reported-by: syzbot+ea75c0ffcd353d32515f064aaebefc5279e6161e@syzkaller.appspotmail.com Signed-off-by: Tom Herbert <tom@quantonium.net> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 16 Mar 2018 14:03:48 +0000 (10:03 -0400)]
Merge branch 'vlan-untag-and-insert-fixes'
Toshiaki Makita says:
====================
Fix vlan untag and insertion for bridge and vlan with reorder_hdr off
As Brandon Carpenter reported[1], sending non-vlan-offloaded packets from
bridge devices ends up with corrupted packets. He narrowed down this problem
and found that the root cause is in skb_reorder_vlan_header().
While I was working on fixing this problem, I found that the function does
not work properly for double tagged packets with reorder_hdr off as well.
Patch 1 fixes these 2 problems in skb_reorder_vlan_header().
And it turned out that fixing skb_reorder_vlan_header() is not sufficient
to receive double tagged packets with reorder_hdr off while I was testing the
fix. Vlan tags got out of order when vlan devices with reorder_hdr disabled
were stacked. Patch 2 fixes this problem.
Toshiaki Makita [Tue, 13 Mar 2018 05:51:28 +0000 (14:51 +0900)]
vlan: Fix out of order vlan headers with reorder header off
With reorder header off, received packets are untagged in skb_vlan_untag()
called from within __netif_receive_skb_core(), and later the tag will be
inserted back in vlan_do_receive().
This caused out of order vlan headers when we create a vlan device on top
of another vlan device, because vlan_do_receive() inserts a tag as the
outermost vlan tag. E.g. the outer tag is first removed in skb_vlan_untag()
and inserted back in vlan_do_receive(), then the inner tag is next removed
and inserted back as the outermost tag.
This patch fixes the behaviour by inserting the inner tag at the right
position.
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
Toshiaki Makita [Tue, 13 Mar 2018 05:51:27 +0000 (14:51 +0900)]
net: Fix vlan untag for bridge and vlan_dev with reorder_hdr off
When we have a bridge with vlan_filtering on and a vlan device on top of
it, packets would be corrupted in skb_vlan_untag() called from
br_dev_xmit().
The problem sits in skb_reorder_vlan_header() used in skb_vlan_untag(),
which makes use of skb->mac_len. In this function mac_len is meant for
handling rx path with vlan devices with reorder_header disabled, but in
tx path mac_len is typically 0 and cannot be used, which is the problem
in this case.
The current code even does not properly handle rx path (skb_vlan_untag()
called from __netif_receive_skb_core()) with reorder_header off actually.
In rx path single tag case, it works as follows:
- Before skb_reorder_vlan_header()
mac_header data
v v
+-------------------+-------------+------+----
| ETH | VLAN | ETH |
| ADDRS | TPID | TCI | TYPE |
+-------------------+-------------+------+----
<-------- mac_len --------->
<------------->
to be removed
- After skb_reorder_vlan_header()
mac_header data
v v
+-------------------+------+----
| ETH | ETH |
| ADDRS | TYPE |
+-------------------+------+----
<-------- mac_len --------->
This is ok, but in rx double tag case, it corrupts packets:
- Before skb_reorder_vlan_header()
mac_header data
v v
+-------------------+-------------+-------------+------+----
| ETH | VLAN | VLAN | ETH |
| ADDRS | TPID | TCI | TPID | TCI | TYPE |
+-------------------+-------------+-------------+------+----
<--------------- mac_len ---------------->
<------------->
should be removed
<--------------------------->
actually will be removed
- After skb_reorder_vlan_header()
mac_header data
v v
+-------------------+------+----
| ETH | ETH |
| ADDRS | TYPE |
+-------------------+------+----
<--------------- mac_len ---------------->
So, two of vlan tags are both removed while only inner one should be
removed and mac_header (and mac_len) is broken.
skb_vlan_untag() is meant for removing the vlan header at (skb->data - 2),
so use skb->data and skb->mac_header to calculate the right offset.
Reported-by: Brandon Carpenter <brandon.carpenter@cypherpath.com> Fixes: b2c9cb7b2566 ("vlan: Fix untag operations of stacked vlans with REORDER_HEADER off") Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
Roman Mashak [Mon, 12 Mar 2018 20:20:58 +0000 (16:20 -0400)]
net sched actions: return explicit error when tunnel_key mode is not specified
If set/unset mode of the tunnel_key action is not provided, ->init() still
returns 0, and the caller proceeds with bogus 'struct tc_action *' object,
this results in crash:
% tc actions add action tunnel_key src_ip 1.1.1.1 dst_ip 2.2.2.1 id 7 index 1
Fixes: 2a0a25bb7e93 ("net/sched: Introduce act_tunnel_key") Signed-off-by: Roman Mashak <mrv@mojatatu.com> Acked-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Hans de Goede [Wed, 14 Mar 2018 22:06:03 +0000 (23:06 +0100)]
Bluetooth: hci_bcm: Set pulsed_host_wake flag in sleep parameters
The IRQ output of the bcm bt-device is really a level IRQ signal, which
signals a logical high as long as the device's buffer contains data. Since
the draining in the buffer is done in the tty driver, we cannot (easily)
wait in a threaded interrupt handler for the draining, after which the
IRQ should go low again.
So instead we treat the IRQ as an edge interrupt. This opens the window
for a theoretical race where we wakeup, read some data and then autosuspend
*before* the IRQ has gone (logical) low, followed by the device just at
that moment receiving more data, causing the IRQ to stay high and we never
see an edge.
Since we call pm_runtime_mark_last_busy() on every received byte, there
should be plenty time for the IRQ to go (logical) low before we ever
suspend, so this should never happen, but after commit 57b03d24b7e8
("Bluetooth: hci_bcm: Streamline runtime PM code"), which has been reverted
since, this was actually happening causing the device to get stuck in
runtime suspend.
The bcm bt-device actually has a workaround for this, if we set the
pulsed_host_wake flag in the sleep parameters, then the device monitors
if the host is draining the buffer and if not then after a timeout the
device will pulse the IRQ line, causing us to see an edge, fixing the
stuck in suspend condition.
This commit sets the pulsed_host_wake flag to fix the (mostly theoretical)
race caused by us treating the IRQ as an edge IRQ.
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This reverts commit 57b03d24b7e8 ("Bluetooth: hci_bcm: Streamline runtime
PM code"). The commit msg for this commit states "No functional change
intended.", but replacing:
Does result in a functional change, pm_request_resume() only calls
pm_runtime_mark_last_busy() if the device was suspended before the call.
This results in the following happening:
1) Device is runtime suspended
2) Device drives host_wake IRQ logically high as it starts receiving data
3) bcm_host_wake() gets called, causes the device to runtime-resume,
current time gets marked as last_busy time
4) After 5 seconds the autosuspend timer expires and the dev autosuspends
as no one has been calling pm_runtime_mark_last_busy(), the device was
resumed during those 5 seconds, so all the pm_request_resume() calls
while receiving data and/or bcm_host_wake() calls were nops
5) If 4) happens while the device has (just received) data in its buffer to
be read by the host the IRQ line is *already* / still logically high
when we autosuspend and since we use an edge triggered IRQ, the IRQ
will never trigger, causing the device to get stuck in suspend
Therefor this commit has to be reverted, so that we avoid the device
getting stuck in suspend.
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Takashi Iwai [Thu, 15 Mar 2018 16:02:34 +0000 (17:02 +0100)]
Bluetooth: btusb: Fix quirk for Atheros 1525/QCA6174
The Atheros 1525/QCA6174 BT doesn't seem working properly on the
recent kernels, as it tries to load a wrong firmware
ar3k/AthrBT_0x00000200.dfu and it fails.
This seems to have been a problem for some time, and the known
workaround is to apply BTUSB_QCA_ROM quirk instead of BTUSB_ATH3012.
Ursula Braun [Tue, 13 Mar 2018 09:41:54 +0000 (10:41 +0100)]
net/smc: simplify wait when closing listen socket
Closing of a listen socket wakes up kernel_accept() of
smc_tcp_listen_worker(), and then has to wait till smc_tcp_listen_worker()
gives up the internal clcsock. The wait logic introduced with
commit 6f0a6522a1b7 ("net/smc: release clcsock from tcp_listen_worker")
might wait longer than necessary. This patch implements the idea to
implement the wait just with flush_work(), and gets rid of the extra
smc_close_wait_listen_clcsock() function.
Fixes: 6f0a6522a1b7 ("net/smc: release clcsock from tcp_listen_worker") Reported-by: Hans Wippel <hwippel@linux.vnet.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cathy Zhou [Wed, 14 Mar 2018 17:56:07 +0000 (10:56 -0700)]
sunvnet: does not support GSO for sctp
The NETIF_F_GSO_SOFTWARE implies support for GSO on SCTP, but the
sunvnet driver does not support GSO for sctp. Here we remove the
NETIF_F_GSO_SOFTWARE feature flag and only report NETIF_F_ALL_TSO
instead.
Signed-off-by: Cathy Zhou <Cathy.Zhou@Oracle.COM> Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 14 Mar 2018 17:50:47 +0000 (13:50 -0400)]
Merge tag 'linux-can-fixes-for-4.16-20180314' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can
Marc Kleine-Budde says:
====================
pull-request: can 2018-03-14
this is a pull request of two patches for net/master.
Both patches are by Andri Yngvason and fix problems in the cc770 driver,
that show up quite fast on RT systems, but also on non RT setups.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Jonathan Toppins [Wed, 14 Mar 2018 16:36:25 +0000 (12:36 -0400)]
tg3: prevent scheduling while atomic splat
The problem was introduced in commit f52013916f95 ("[netdrv] tg3: APE heartbeat changes"). The bug occurs
because tp->lock spinlock is held which is obtained in tg3_start
by way of tg3_full_lock(), line 11571. The documentation for usleep_range()
specifically states it cannot be used inside a spinlock.
Fixes: f52013916f95 ("[netdrv] tg3: APE heartbeat changes") Signed-off-by: Jonathan Toppins <jtoppins@redhat.com> Acked-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Sabrina Dubroca [Wed, 14 Mar 2018 09:21:14 +0000 (10:21 +0100)]
ipv4: lock mtu in fnhe when received PMTU < net.ipv4.route.min_pmtu
Prior to the rework of PMTU information storage in commit 4c4d000e0eff ("ipv4: Cache learned PMTU information in inetpeer."),
when a PMTU event advertising a PMTU smaller than
net.ipv4.route.min_pmtu was received, we would disable setting the DF
flag on packets by locking the MTU metric, and set the PMTU to
net.ipv4.route.min_pmtu.
Since then, we don't disable DF, and set PMTU to
net.ipv4.route.min_pmtu, so the intermediate router that has this link
with a small MTU will have to drop the packets.
This patch reestablishes pre-2.6.39 behavior by splitting
rtable->rt_pmtu into a bitfield with rt_mtu_locked and rt_pmtu.
rt_mtu_locked indicates that we shouldn't set the DF bit on that path,
and is checked in ip_dont_fragment().
One possible workaround is to set net.ipv4.route.min_pmtu to a value low
enough to accommodate the lowest MTU encountered.
Fixes: 4c4d000e0eff ("ipv4: Cache learned PMTU information in inetpeer.") Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 14 Mar 2018 17:16:23 +0000 (13:16 -0400)]
Merge branch 'DPAA-Ethernet-fixes'
Madalin Bucur says:
====================
DPAA Ethernet fixes
This patch set is addressing several issues in the DPAA Ethernet
driver suite:
- module unload crash caused by wrong reference to device being left
in the cleanup code after the DSA related changes
- scheduling wile atomic bug in QMan code revealed during dpaa_eth
module unload
- a couple of error counter fixes, a duplicated init in dpaa_eth.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Camelia Groza [Wed, 14 Mar 2018 13:37:32 +0000 (08:37 -0500)]
dpaa_eth: remove duplicate increment of the tx_errors counter
The tx_errors counter is incremented by the dpaa_xmit caller.
Signed-off-by: Camelia Groza <camelia.groza@nxp.com> Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Madalin Bucur [Wed, 14 Mar 2018 13:37:29 +0000 (08:37 -0500)]
dpaa_eth: fix error in dpaa_remove()
The recent changes that make the driver probing compatible with DSA
were not propagated in the dpa_remove() function, breaking the
module unload function. Using the proper device to address the issue.
Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Madalin Bucur [Wed, 14 Mar 2018 13:37:28 +0000 (08:37 -0500)]
soc/fsl/qbman: fix issue in qman_delete_cgr_safe()
The wait_for_completion() call in qman_delete_cgr_safe()
was triggering a scheduling while atomic bug, replacing the
kthread with a smp_call_function_single() call to fix it.
Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com> Signed-off-by: Roy Pledge <roy.pledge@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Wed, 14 Mar 2018 16:04:16 +0000 (09:04 -0700)]
net: use skb_to_full_sk() in skb_update_prio()
Andrei Vagin reported a KASAN: slab-out-of-bounds error in
skb_update_prio()
Since SYNACK might be attached to a request socket, we need to
get back to the listener socket.
Since this listener is manipulated without locks, add const
qualifiers to sock_cgroup_prioidx() so that the const can also
be used in skb_update_prio()
Also add the const qualifier to sock_cgroup_classid() for consistency.
Fixes: 4b6a53b8f218 ("tcp: attach SYNACK messages to request sockets instead of listener") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Andrei Vagin <avagin@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Andri Yngvason [Wed, 14 Mar 2018 11:52:57 +0000 (11:52 +0000)]
can: cc770: Fix queue stall & dropped RTR reply
While waiting for the TX object to send an RTR, an external message with a
matching id can overwrite the TX data. In this case we must call the rx
routine and then try transmitting the message that was overwritten again.
The queue was being stalled because the RX event did not generate an
interrupt to wake up the queue again and the TX event did not happen
because the TXRQST flag is reset by the chip when new data is received.
According to the CC770 datasheet the id of a message object should not be
changed while the MSGVAL bit is set. This has been fixed by resetting the
MSGVAL bit before modifying the object in the transmit function and setting
it after. It is not enough to set & reset CPUUPD.
It is important to keep the MSGVAL bit reset while the message object is
being modified. Otherwise, during RTR transmission, a frame with matching
id could trigger an rx-interrupt, which would cause a race condition
between the interrupt routine and the transmit function.
Signed-off-by: Andri Yngvason <andri.yngvason@marel.com> Tested-by: Richard Weinberger <richard@nod.at> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Dan Carpenter [Tue, 13 Mar 2018 09:09:38 +0000 (12:09 +0300)]
qed: Use after free in qed_rdma_free()
We're dereferencing "p_hwfn->p_rdma_info" but that is freed on the line
before in qed_rdma_resc_free(p_hwfn).
Fixes: 9d42b27da2c7 ("qed: Free RoCE ILT Memory on rmmod qedr") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Michal Kalderon <Michal.Kalderon@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1) Refuse to insert 32 bit userspace socket policies on 64
bit systems like we do it for standard policies. We don't
have a compat layer, so inserting socket policies from
32 bit userspace will lead to a broken configuration.
2) Make the policy hold queue work without the flowcache.
Dummy bundles are not chached anymore, so we need to
generate a new one on each lookup as long as the SAs
are not yet in place.
3) Fix the validation of the esn replay attribute. The
The sanity check in verify_replay() is bypassed if
the XFRM_STATE_ESN flag is not set. Fix this by doing
the sanity check uncoditionally.
From Florian Westphal.
4) After most of the dst_entry garbage collection code
is removed, we may leak xfrm_dst entries as they are
neither cached nor tracked somewhere. Fix this by
reusing the 'uncached_list' to track xfrm_dst entries
too. From Xin Long.
5) Fix a rcu_read_lock/rcu_read_unlock imbalance in
xfrm_get_tos() From Xin Long.
6) Fix an infinite loop in xfrm_get_dst_nexthop. On
transport mode we fetch the child dst_entry after
we continue, so this pointer is never updated.
Fix this by fetching it before we continue.
7) Fix ESN sequence number gap after IPsec GSO packets.
We accidentally increment the sequence number counter
on the xfrm_state by one packet too much in the ESN
case. Fix this by setting the sequence number to the
correct value.
8) Reset the ethernet protocol after decapsulation only if a
mac header was set. Otherwise it breaks configurations
with TUN devices. From Yossi Kuperman.
9) Fix __this_cpu_read() usage in preemptible code. Use
this_cpu_read() instead in ipcomp_alloc_tfms().
From Greg Hackmann.
Please pull or let me know if there are problems.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
projects / kernel.git / log