Cong Wang [Wed, 1 Nov 2017 17:23:50 +0000 (10:23 -0700)]
net_sched: hold netns refcnt for each action
TC actions have been destroyed asynchronously for a long time,
previously in a RCU callback and now in a workqueue. If we
don't hold a refcnt for its netns, we could use the per netns
data structure, struct tcf_idrinfo, after it has been freed by
netns workqueue.
Hold refcnt to ensure netns destroy happens after all actions
are gone.
Fixes: ddf97ccdd7cb ("net_sched: add network namespace support for tc actions") Reported-by: Lucas Bates <lucasb@mojatatu.com> Tested-by: Lucas Bates <lucasb@mojatatu.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Wed, 1 Nov 2017 17:23:49 +0000 (10:23 -0700)]
net_sched: acquire RTNL in tc_action_net_exit()
I forgot to acquire RTNL in tc_action_net_exit()
which leads that action ops->cleanup() is not always
called with RTNL. This usually is not a big deal because
this function is called after all netns refcnt are gone,
but given RTNL protects more than just actions, add it
for safety and consistency.
Also add an assertion to catch other potential bugs.
Fixes: ddf97ccdd7cb ("net_sched: add network namespace support for tc actions") Reported-by: Lucas Bates <lucasb@mojatatu.com> Tested-by: Lucas Bates <lucasb@mojatatu.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
The following patchset contains two one-liner fixes for your net tree,
they are:
1) Disable fast hash operations for 2-bytes length keys which is leading
to incorrect lookups in nf_tables, from Anatole Denis.
2) Reload pointer ipv4 header after ip_route_me_harder() given this may
result in use-after-free due to skbuff header reallocation, patch
from Tejaswi Tanikella.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Jeff Barnhill [Wed, 1 Nov 2017 14:58:09 +0000 (14:58 +0000)]
net: vrf: correct FRA_L3MDEV encode type
FRA_L3MDEV is defined as U8, but is being added as a U32 attribute. On
big endian architecture, this results in the l3mdev entry not being
added to the FIB rules.
Fixes: 1aa6c4f6b8cd8 ("net: vrf: Add l3mdev rules on first device create") Signed-off-by: Jeff Barnhill <0xeffeff@gmail.com> Acked-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Average RTT could become zero. This happened in real life at least twice.
This patch treats zero as 1us.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Acked-by: Lawrence Brakmo <Brakmo@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Wed, 1 Nov 2017 23:04:27 +0000 (16:04 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull signal bugfix from Eric Biederman:
"When making the generic support for SIGEMT conditional on the presence
of SIGEMT I made a typo that causes it to fail to activate. It was
noticed comparatively quickly but the bug report just made it to me
today"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
signal: Fix name of SIGEMT in #if defined() check
Andrew Clayton [Wed, 1 Nov 2017 15:49:59 +0000 (15:49 +0000)]
signal: Fix name of SIGEMT in #if defined() check
Commit cc731525f26a ("signal: Remove kernel interal si_code magic")
added a check for SIGMET and NSIGEMT being defined. That SIGMET should
in fact be SIGEMT, with SIGEMT being defined in
arch/{alpha,mips,sparc}/include/uapi/asm/signal.h
This was actually pointed out by BenHutchings in a lwn.net comment
here https://lwn.net/Comments/734608/
Fixes: cc731525f26a ("signal: Remove kernel interal si_code magic") Signed-off-by: Andrew Clayton <andrew@digital-domain.net> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Linus Torvalds [Wed, 1 Nov 2017 21:46:38 +0000 (14:46 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"A few fixes that should go into this series:
- Regression fix for ide-cd, ensuring that a request is fully
initialized. From Hongxu.
- Ditto fix for virtio_blk, from Bart.
- NVMe fix from Keith, ensuring that we set the right block size on
revalidation. If the block size changed, we'd be in trouble without
it.
- NVMe rdma fix from Sagi, fixing a potential hang while the
controller is being removed"
* 'for-linus' of git://git.kernel.dk/linux-block:
ide:ide-cd: fix kernel panic resulting from missing scsi_req_init
nvme: Fix setting logical block format when revalidating
virtio_blk: Fix an SG_IO regression
nvme-rdma: fix possible hang when issuing commands during ctrl removal
The vma should be pinned by mmap_sem, but handle_userfault() might (in a
return to userspace scenario) release it and then acquire again, so when
we return to __do_page_fault() (with other result than VM_FAULT_RETRY),
the vma might be gone.
Specifically, per Andrea the scenario is
"A return to userland to repeat the page fault later with a
VM_FAULT_NOPAGE retval (potentially after handling any pending signal
during the return to userland). The return to userland is identified
whenever FAULT_FLAG_USER|FAULT_FLAG_KILLABLE are both set in
vmf->flags"
However, since commit a3c4fb7c9c2e ("x86/mm: Fix fault error path using
unsafe vma pointer") there is a vma_pkey() read of vma->vm_flags after
that point, which can thus become use-after-free. Fix this by moving
the read before calling handle_mm_fault().
Hongxu Jia [Tue, 31 Oct 2017 07:39:40 +0000 (15:39 +0800)]
ide:ide-cd: fix kernel panic resulting from missing scsi_req_init
Since we split the scsi_request out of struct request, while the
standard prep_rq_fn builds 10 byte cmds, it missed to invoke
scsi_req_init() to initialize certain fields of a scsi_request
structure (.__cmd[], .cmd, .cmd_len and .sense_len but no other
members of struct scsi_request).
An example panic on virtual machines (qemu/virtualbox) to boot
from IDE cdrom:
...
[ 8.754381] Call Trace:
[ 8.755419] blk_peek_request+0x182/0x2e0
[ 8.755863] blk_fetch_request+0x1c/0x40
[ 8.756148] ? ktime_get+0x40/0xa0
[ 8.756385] do_ide_request+0x37d/0x660
[ 8.756704] ? cfq_group_service_tree_add+0x98/0xc0
[ 8.757011] ? cfq_service_tree_add+0x1e5/0x2c0
[ 8.757313] ? ktime_get+0x40/0xa0
[ 8.757544] __blk_run_queue+0x3d/0x60
[ 8.757837] queue_unplugged+0x2f/0xc0
[ 8.758088] blk_flush_plug_list+0x1f4/0x240
[ 8.758362] blk_finish_plug+0x2c/0x40
...
[ 8.770906] RIP: ide_cdrom_prep_fn+0x63/0x180 RSP: ffff92aec018bae8
[ 8.772329] ---[ end trace 6408481e551a85c9 ]---
...
Fixes: 82ed4db499b8 ("block: split scsi_request out of struct request") Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Eric Dumazet [Tue, 31 Oct 2017 06:08:20 +0000 (23:08 -0700)]
tcp: fix tcp_mtu_probe() vs highest_sack
Based on SNMP values provided by Roman, Yuchung made the observation
that some crashes in tcp_sacktag_walk() might be caused by MTU probing.
Looking at tcp_mtu_probe(), I found that when a new skb was placed
in front of the write queue, we were not updating tcp highest sack.
If one skb is freed because all its content was copied to the new skb
(for MTU probing), then tp->highest_sack could point to a now freed skb.
Bad things would then happen, including infinite loops.
This patch renames tcp_highest_sack_combine() and uses it
from tcp_mtu_probe() to fix the bug.
Note that I also removed one test against tp->sacked_out,
since we want to replace tp->highest_sack regardless of whatever
condition, since keeping a stale pointer to freed skb is a recipe
for disaster.
Fixes: a47e5a988a57 ("[TCP]: Convert highest_sack to sk_buff to allow direct access") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Alexei Starovoitov <alexei.starovoitov@gmail.com> Reported-by: Roman Gushchin <guro@fb.com> Reported-by: Oleksandr Natalenko <oleksandr@natalenko.name> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Tue, 31 Oct 2017 05:47:09 +0000 (22:47 -0700)]
ipv6: addrconf: increment ifp refcount before ipv6_del_addr()
In the (unlikely) event fixup_permanent_addr() returns a failure,
addrconf_permanent_addr() calls ipv6_del_addr() without the
mandatory call to in6_ifa_hold(), leading to a refcount error,
spotted by syzkaller :
WARNING: CPU: 1 PID: 3142 at lib/refcount.c:227 refcount_dec+0x4c/0x50
lib/refcount.c:227
Kernel panic - not syncing: panic_on_warn set ...
Fixes: f1705ec197e7 ("net: ipv6: Make address flushing on ifdown optional") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: David Ahern <dsahern@gmail.com> Acked-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Craig Gallek [Mon, 30 Oct 2017 22:50:11 +0000 (18:50 -0400)]
tun/tap: sanitize TUNSETSNDBUF input
Syzkaller found several variants of the lockup below by setting negative
values with the TUNSETSNDBUF ioctl. This patch adds a sanity check
to both the tun and tap versions of this ioctl.
Fixes: 33dccbb050bb ("tun: Limit amount of queued packets per device") Fixes: 20d29d7a916a ("net: macvtap driver") Signed-off-by: Craig Gallek <kraig@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Vadim Pasternak [Wed, 1 Nov 2017 11:10:42 +0000 (12:10 +0100)]
mlxsw: i2c: Fix buffer increment counter for write transaction
It fixes a problem for the last chunk where 'chunk_size' is smaller than
MLXSW_I2C_BLK_MAX and data is copied to the wrong offset, overriding
previous data.
Fixes: 6882b0aee180 ("mlxsw: Introduce support for I2C bus") Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
netfilter: nf_reject_ipv4: Fix use-after-free in send_reset
niph is not updated after pskb_expand_head changes the skb head. It
still points to the freed data, which is then used to update tot_len and
checksum. This could cause use-after-free poison crash.
Update niph, if ip_route_me_harder does not fail.
This only affects the interaction with REJECT targets and br_netfilter.
Signed-off-by: Tejaswi Tanikella <tejaswit@codeaurora.org> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
1) Fix a memleak when a packet matches a policy
without a matching state.
2) Reset the socket cached dst_entry when inserting
a socket policy, otherwise the policy might be
ignored. From Jonathan Basseri.
3) Fix GSO for a IPsec, GRE tunnel combination.
We reset the encapsulation field at the skb
too erly, as a result GRE does not segment
GSO packets. Fix this by resetting the the
encapsulation field right before the
transformation where the inner headers get
invalid.
Please pull or let me know if there are problems.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 30 Oct 2017 09:51:18 +0000 (10:51 +0100)]
mlxsw: reg: Add high and low temperature thresholds
The ASIC has the ability to generate events whenever a sensor indicates
the temperature goes above or below its high or low thresholds,
respectively.
In new firmware versions the firmware enforces a minimum of 5
degrees Celsius difference between both thresholds. Make the driver
conform to this requirement.
Note that this is required even when the events are disabled, as in
certain systems interrupts are generated via GPIO based on these
thresholds.
Fixes: 85926f877040 ("mlxsw: reg: Add definition of temperature management registers") Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Yotam Gigi [Mon, 30 Oct 2017 09:41:36 +0000 (11:41 +0200)]
MAINTAINERS: Update Yotam's E-mail
For the time being I will be available in my private mail. Update both the
MAINTAINERS file and the individual modules MODULE_AUTHOR directive with
the new address.
Signed-off-by: Yotam Gigi <yotam.gi@gmail.com> Signed-off-by: Yuval Mintz <yuvalm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Pan Bian [Mon, 30 Oct 2017 08:50:01 +0000 (16:50 +0800)]
net: hns: set correct return value
The function of_parse_phandle() returns a NULL pointer if it cannot
resolve a phandle property to a device_node pointer. In function
hns_nic_dev_probe(), its return value is passed to PTR_ERR to extract
the error code. However, in this case, the extracted error code will
always be zero, which is unexpected.
Signed-off-by: Pan Bian <bianpan2016@163.com> Reviewed-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Pan Bian [Sun, 29 Oct 2017 13:57:22 +0000 (21:57 +0800)]
net: lapbether: fix double free
The function netdev_priv() returns the private data of the device. The
memory to store the private data is allocated in alloc_netdev() and is
released in netdev_free(). Calling kfree() on the return value of
netdev_priv() after netdev_free() results in a double free bug.
Signed-off-by: Pan Bian <bianpan2016@163.com> Signed-off-by: David S. Miller <davem@davemloft.net>
John Fastabend [Wed, 1 Nov 2017 02:17:31 +0000 (19:17 -0700)]
bpf: remove SK_REDIRECT from UAPI
Now that SK_REDIRECT is no longer a valid return code. Remove it
from the UAPI completely. Then do a namespace remapping internal
to sockmap so SK_REDIRECT is no longer externally visible.
Patchs primary change is to do a namechange from SK_REDIRECT to
__SK_REDIRECT
Reported-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Lunn [Tue, 31 Oct 2017 19:31:28 +0000 (20:31 +0100)]
net: phy: marvell: Only configure RGMII delays when using RGMII
The fix 5987feb38aa5 ("net: phy: marvell: logical vs bitwise OR typo")
uncovered another bug in the Marvell PHY driver, which broke the
Marvell OpenRD platform. It relies on the bootloader configuring the
RGMII delays and does not specify a phy-mode in its device tree. The
PHY driver should only configure RGMII delays if the phy mode
indicates it is using RGMII. Without anything in device tree, the
mv643xx Ethernet driver defaults to GMII.
Fixes: 5987feb38aa5 ("net: phy: marvell: logical vs bitwise OR typo") Signed-off-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Tue, 31 Oct 2017 22:52:48 +0000 (15:52 -0700)]
Merge tag 'pm-reverts-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management commit reverts from Rafael Wysocki:
"Since Geert reports additional problems with my PM QoS fix from the
last week that have not been addressed by the most recent fixup on top
of it, they both should better be reverted now and let's fix the
original issue properly in 4.15.
This reverts two recent PM QoS commits one of which introduced
multiple problems and the other one fixed some, but not all of them
(Rafael Wysocki)"
Leon Romanovsky [Tue, 31 Oct 2017 18:09:54 +0000 (20:09 +0200)]
RDMA/nldev: Enforce device index check for port callback
IB device index is nldev's handler and it should be checked always.
Fixes: c3f66f7b0052 ("RDMA/netlink: Implement nldev port doit callback") Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Acked-by: Doug Ledford <dledford@redhat.com>
[ Applying directly, since Doug fried his SSD's and is rebuilding - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This reverts commit 0cc2b4e5a020 (PM / QoS: Fix device resume latency PM
QoS) as it introduced regressions on multiple systems and the fix-up
in commit 2a9a86d5c813 (PM / QoS: Fix default runtime_pm device resume
latency) does not address all of them.
The original problem that commit 0cc2b4e5a020 was attempting to fix
will be addressed later.
Fixes: 0cc2b4e5a020 (PM / QoS: Fix device resume latency PM QoS) Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Steffen Klassert [Mon, 30 Oct 2017 09:04:04 +0000 (10:04 +0100)]
xfrm: Fix GSO for IPsec with GRE tunnel.
We reset the encapsulation field of the skb too early
in xfrm_output. As a result, the GRE GSO handler does
not segment the packets. This leads to a performance
drop down. We fix this by resetting the encapsulation
field right before we do the transformation, when
the inner headers become invalid.
Fixes: f1bd7d659ef0 ("xfrm: Add encapsulation header offsets while SKB is not encrypted") Reported-by: Vicente De Luca <vdeluca@zendesk.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Brenda J. Butler [Mon, 30 Oct 2017 21:59:22 +0000 (17:59 -0400)]
tc-testing: fix arg to ip command: -s -> -n
Fixes: 31c2611b66e0 ("selftests: Introduce a new test case to tc testsuite") Fixes: 76b903ee198d ("selftests: Introduce tc testsuite") Signed-off-by: Brenda J. Butler <bjb@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Mon, 30 Oct 2017 18:10:09 +0000 (11:10 -0700)]
net_sched: remove tcf_block_put_deferred()
In commit 7aa0045dadb6 ("net_sched: introduce a workqueue for RCU callbacks of tc filter")
I defer tcf_chain_flush() to a workqueue, this causes a use-after-free
because qdisc is already destroyed after we queue this work.
The tcf_block_put_deferred() is no longer necessary after we get RTNL
for each tc filter destroy work, no others could jump in at this point.
Same for tcf_chain_hold(), we are fully serialized now.
This also reduces one indirection therefore makes the code more
readable. Note this brings back a rcu_barrier(), however comparing
to the code prior to commit 7aa0045dadb6 we still reduced one
rcu_barrier(). For net-next, we can consider to refcnt tcf block to
avoid it.
Fixes: 7aa0045dadb6 ("net_sched: introduce a workqueue for RCU callbacks of tc filter") Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Eric Dumazet <edumazet@google.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Guillaume Nault [Mon, 30 Oct 2017 16:58:58 +0000 (17:58 +0100)]
l2tp: hold tunnel in pppol2tp_connect()
Use l2tp_tunnel_get() in pppol2tp_connect() to ensure the tunnel isn't
going to disappear while processing the rest of the function.
Fixes: fd558d186df2 ("l2tp: Split pppol2tp patch into separate l2tp and ppp parts") Signed-off-by: Guillaume Nault <g.nault@alphalink.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Mon, 30 Oct 2017 23:38:03 +0000 (16:38 -0700)]
Merge tag 'pm-urgent-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fix from Rafael Wysocki:
"This fixes new breakage introduced by the most recent PM QoS fix in
which, embarrassingly enough, I forgot to update
dev_pm_qos_raw_read_value() to return the right default for devices
with no PM QoS constraints at all which prevents runtime PM from
suspending those devices (fix from Tero Kristo)"
* tag 'pm-urgent-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / QoS: Fix default runtime_pm device resume latency
Linus Torvalds [Mon, 30 Oct 2017 17:09:56 +0000 (10:09 -0700)]
Mark 'ioremap_page_range()' as possibly sleeping
It turns out that some drivers seem to think it's ok to remap page
ranges from within interrupts and even NMI's. That is definitely not
the case, since the page table build-up is simply not interrupt-safe.
This showed up in the zero-day robot that reported it for the ACPI APEI
GHES ("Generic Hardware Error Source") driver. Normally it had been
hidden by the fact that no page table operations had been needed because
the vmalloc area had been set up by other things.
Apparently due to a recent change to the GHEI driver: commit 77b246b32b2c ("acpi: apei: check for pending errors when probing GHES
entries") 0day actually caught a case during bootup whenthe ioremap
called down to page allocation. But that recent change only showed the
symptom, it wasn't the root cause of the problem.
Hopefully it is limited to just that one driver.
If you need to access random physical memory, you either need to ioremap
in process context, or you need to use the FIXMAP facility to set one
particular fixmap entry to the required mapping - that can be done safely.
Cc: Borislav Petkov <bp@suse.de> Cc: Len Brown <lenb@kernel.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Tyler Baicar <tbaicar@codeaurora.org> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tag 'mmc-v4.14-rc4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: renesas_sdhi: fix kernel panic in _internal_dmac.c
mmc: tmio: fix swiotlb buffer is full
Keith Busch [Fri, 27 Oct 2017 19:51:22 +0000 (13:51 -0600)]
nvme: Fix setting logical block format when revalidating
Revalidating the disk needs to set the logical block format and capacity,
otherwise it can't figure out if the users modified anything about
the namespace.
The recent change to the PM QoS framework to introduce a proper
no constraint value overlooked to handle the devices which don't
implement PM QoS OPS. Runtime PM is one of the more severely
impacted subsystems, failing every attempt to runtime suspend
a device. This leads into some nasty second level issues like
probe failures and increased power consumption among other
things.
Fix this by adding a proper return value for devices that don't
implement PM QoS.
Fixes: 0cc2b4e5a020 (PM / QoS: Fix device resume latency PM QoS) Signed-off-by: Tero Kristo <t-kristo@ti.com> Cc: All applicable <stable@vger.kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Kalle Valo [Sun, 29 Oct 2017 07:45:07 +0000 (09:45 +0200)]
Revert "ath10k: fix napi_poll budget overflow"
Thorsten reported on <fa6e3ee2-91b5-a54b-afe3-87f30aac7a48@leemhuis.info> that
commit c9353bf483d3 made ath10k unstable with QCA6174 on his Dell XPS13 (9360)
with an error message:
ath10k_pci 0000:3a:00.0: failed to extract amsdu: -11
It only seemed to happen with certain APs, not all, but when it happened the
only way to get ath10k working was to switch the wifi off and on with a hotkey.
As this commit made things even worse (a warning vs breaking the whole
connection) let's revert the commit for now and while the issue is being fixed.
Rx data frames notified through HTT_T2H_MSG_TYPE_RX_IND and
HTT_T2H_MSG_TYPE_RX_FRAG_IND expect PN/TSC check to be done
on host (mac80211) rather than firmware. Rebuild cipher header
in every received data frames (that are notified through those
HTT interfaces) from the rx_hdr_status tlv available in the
rx descriptor of the first msdu. Skip setting RX_FLAG_IV_STRIPPED
flag for the packets which requires mac80211 PN/TSC check support
and set appropriate RX_FLAG for stripped crypto tail. Hw QCA988X,
QCA9887, QCA99X0, QCA9984, QCA9888 and QCA4019 currently need the
rebuilding of cipher header to perform PN/TSC check for replay
attack.
Please note that removing crypto tail for CCMP-256, GCMP and GCMP-256 ciphers
in raw mode needs to be fixed. Since Rx with these ciphers in raw
mode does not work in the current form even without this patch and
removing crypto tail for these chipers needs clean up, raw mode related
issues in CCMP-256, GCMP and GCMP-256 can be addressed in follow up
patches.
Tested-by: Manikanta Pubbisetty <mpubbise@qti.qualcomm.com> Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qti.qualcomm.com> Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Ronnie Sahlberg [Mon, 30 Oct 2017 02:28:03 +0000 (13:28 +1100)]
cifs: check MaxPathNameComponentLength != 0 before using it
And fix tcon leak in error path.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com> CC: Stable <stable@vger.kernel.org> Reviewed-by: David Disseldorp <ddiss@samba.org>
2) In mac80211, validate user rate mask before configuring it. From
Johannes Berg.
3) Properly enforce memory limits in fair queueing code, from Toke
Hoiland-Jorgensen.
4) Fix lockdep splat in inet_csk_route_req(), from Eric Dumazet.
5) Fix TSO header allocation and management in mvpp2 driver, from Yan
Markman.
6) Don't take socket lock in BH handler in strparser code, from Tom
Herbert.
7) Don't show sockets from other namespaces in AF_UNIX code, from
Andrei Vagin.
8) Fix double free in error path of tap_open(), from Girish Moodalbail.
9) Fix TX map failure path in igb and ixgbe, from Jean-Philippe Brucker
and Alexander Duyck.
10) Fix DCB mode programming in stmmac driver, from Jose Abreu.
11) Fix err_count handling in various tunnels (ipip, ip6_gre). From Xin
Long.
12) Properly align SKB head before building SKB in tuntap, from Jason
Wang.
13) Avoid matching qdiscs with a zero handle during lookups, from Cong
Wang.
14) Fix various endianness bugs in sctp, from Xin Long.
15) Fix tc filter callback races and add selftests which trigger the
problem, from Cong Wang.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (73 commits)
selftests: Introduce a new test case to tc testsuite
selftests: Introduce a new script to generate tc batch file
net_sched: fix call_rcu() race on act_sample module removal
net_sched: add rtnl assertion to tcf_exts_destroy()
net_sched: use tcf_queue_work() in tcindex filter
net_sched: use tcf_queue_work() in rsvp filter
net_sched: use tcf_queue_work() in route filter
net_sched: use tcf_queue_work() in u32 filter
net_sched: use tcf_queue_work() in matchall filter
net_sched: use tcf_queue_work() in fw filter
net_sched: use tcf_queue_work() in flower filter
net_sched: use tcf_queue_work() in flow filter
net_sched: use tcf_queue_work() in cgroup filter
net_sched: use tcf_queue_work() in bpf filter
net_sched: use tcf_queue_work() in basic filter
net_sched: introduce a workqueue for RCU callbacks of tc filter
sctp: fix some type cast warnings introduced since very beginning
sctp: fix a type cast warnings that causes a_rwnd gets the wrong value
sctp: fix some type cast warnings introduced by transport rhashtable
sctp: fix some type cast warnings introduced by stream reconf
...
3. Two more bugs found by Chris:
https://patchwork.ozlabs.org/patch/826696/
https://patchwork.ozlabs.org/patch/826695/
Usually RCU callbacks are simple, however for TC filters and actions,
they are complex because at least TC actions could be destroyed
together with the TC filter in one callback. And RCU callbacks are
invoked in BH context, without locking they are parallel too. All of
these contribute to the cause of these nasty bugs.
Alternatively, we could also:
a) Introduce a spinlock to serialize these RCU callbacks. But as I
said in commit 1697c4bb5245 ("net_sched: carefully handle
tcf_block_put()"), it is very hard to do because of tcf_chain_dump().
Potentially we need to do a lot of work to make it possible (if not
impossible).
b) Just get rid of these RCU callbacks, because they are not
necessary at all, callers of these call_rcu() are all on slow paths
and holding RTNL lock, so blocking is allowed in their contexts.
However, David and Eric dislike adding synchronize_rcu() here.
As suggested by Paul, we could defer the work to a workqueue and
gain the permission of holding RTNL again without any performance
impact, however, in tcf_block_put() we could have a deadlock when
flushing workqueue while hodling RTNL lock, the trick here is to
defer the work itself in workqueue and make it queued after all
other works so that we keep the same ordering to avoid any
use-after-free. Please see the first patch for details.
Patch 1 introduces the infrastructure, patch 2~12 move each
tc filter to the new tc filter workqueue, patch 13 adds
an assertion to catch potential bugs like this, patch 14
closes another rcu callback race, patch 15 and patch 16 add
new test cases.
====================
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Chris Mi [Fri, 27 Oct 2017 01:24:43 +0000 (18:24 -0700)]
selftests: Introduce a new test case to tc testsuite
In this patchset, we fixed a tc bug. This patch adds the test case
that reproduces the bug. To run this test case, user should specify
an existing NIC device:
# sudo ./tdc.py -d enp4s0f0
This test case belongs to category "flower". If user doesn't specify
a NIC device, the test cases belong to "flower" will not be run.
In this test case, we create 1M filters and all filters share the same
action. When destroying all filters, kernel should not panic. It takes
about 18s to run it.
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Acked-by: Lucas Bates <lucasb@mojatatu.com> Signed-off-by: Chris Mi <chrism@mellanox.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
positional arguments:
device device name
file batch file name
optional arguments:
-h, --help show this help message and exit
-n NUMBER, --number NUMBER
how many lines in batch file
-o, --skip_sw skip_sw (offload), by default skip_hw
-s, --share_action all filters share the same action
-p, --prio all filters have different prio
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Acked-by: Lucas Bates <lucasb@mojatatu.com> Signed-off-by: Chris Mi <chrism@mellanox.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:41 +0000 (18:24 -0700)]
net_sched: fix call_rcu() race on act_sample module removal
Similar to commit c78e1746d3ad
("net: sched: fix call_rcu() race on classifier module unloads"),
we need to wait for flying RCU callback tcf_sample_cleanup_rcu().
Cc: Yotam Gigi <yotamg@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:40 +0000 (18:24 -0700)]
net_sched: add rtnl assertion to tcf_exts_destroy()
After previous patches, it is now safe to claim that
tcf_exts_destroy() is always called with RTNL lock.
Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:39 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in tcindex filter
Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:38 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in rsvp filter
Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:37 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in route filter
Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:36 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in u32 filter
Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:35 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in matchall filter
Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:34 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in fw filter
Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:33 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in flower filter
Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:32 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in flow filter
Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:31 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in cgroup filter
Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:30 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in bpf filter
Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:29 +0000 (18:24 -0700)]
net_sched: use tcf_queue_work() in basic filter
Defer the tcf_exts_destroy() in RCU callback to
tc filter workqueue and get RTNL lock.
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 27 Oct 2017 01:24:28 +0000 (18:24 -0700)]
net_sched: introduce a workqueue for RCU callbacks of tc filter
This patch introduces a dedicated workqueue for tc filters
so that each tc filter's RCU callback could defer their
action destroy work to this workqueue. The helper
tcf_queue_work() is introduced for them to use.
Because we hold RTNL lock when calling tcf_block_put(), we
can not simply flush works inside it, therefore we have to
defer it again to this workqueue and make sure all flying RCU
callbacks have already queued their work before this one, in
other words, to ensure this is the last one to execute to
prevent any use-after-free.
On the other hand, this makes tcf_block_put() ugly and
harder to understand. Since David and Eric strongly dislike
adding synchronize_rcu(), this is probably the only
solution that could make everyone happy.
Please also see the code comments below.
Reported-by: Chris Mi <chrism@mellanox.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 29 Oct 2017 09:03:25 +0000 (18:03 +0900)]
Merge branch 'sctp-endianness-fixes'
Xin Long says:
====================
sctp: a bunch of fixes for some sparse warnings
As Eric noticed, when running 'make C=2 M=net/sctp/', a plenty of
warnings or errors checked by sparse appear. They are all problems
about Endian and type cast.
Most of them are just warnings by which no issues could be caused
while some might be bugs.
This patchset fixes them with four patches basically according to
how they are introduced.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Sat, 28 Oct 2017 11:43:57 +0000 (19:43 +0800)]
sctp: fix some type cast warnings introduced since very beginning
These warnings were found by running 'make C=2 M=net/sctp/'.
They are there since very beginning.
Note after this patch, there still one warning left in
sctp_outq_flush():
sctp_chunk_fail(chunk, SCTP_ERROR_INV_STRM)
Since it has been moved to sctp_stream_outq_migrate on net-next,
to avoid the extra job when merging net-next to net, I will post
the fix for it after the merging is done.
Reported-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Sat, 28 Oct 2017 11:43:56 +0000 (19:43 +0800)]
sctp: fix a type cast warnings that causes a_rwnd gets the wrong value
These warnings were found by running 'make C=2 M=net/sctp/'.
Commit d4d6fb5787a6 ("sctp: Try not to change a_rwnd when faking a
SACK from SHUTDOWN.") expected to use the peers old rwnd and add
our flight size to the a_rwnd. But with the wrong Endian, it may
not work as well as expected.
So fix it by converting to the right value.
Fixes: d4d6fb5787a6 ("sctp: Try not to change a_rwnd when faking a SACK from SHUTDOWN.") Reported-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Sat, 28 Oct 2017 11:43:55 +0000 (19:43 +0800)]
sctp: fix some type cast warnings introduced by transport rhashtable
These warnings were found by running 'make C=2 M=net/sctp/'.
They are introduced by not aware of Endian for the port when
coding transport rhashtable patches.
Fixes: 7fda702f9315 ("sctp: use new rhlist interface on sctp transport rhashtable") Reported-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Sat, 28 Oct 2017 11:43:54 +0000 (19:43 +0800)]
sctp: fix some type cast warnings introduced by stream reconf
These warnings were found by running 'make C=2 M=net/sctp/'.
They are introduced by not aware of Endian when coding stream
reconf patches.
Since commit c0d8bab6ae51 ("sctp: add get and set sockopt for
reconf_enable") enabled stream reconf feature for users, the
Fixes tag below would use it.
Fixes: c0d8bab6ae51 ("sctp: add get and set sockopt for reconf_enable") Reported-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Sat, 28 Oct 2017 05:08:56 +0000 (22:08 -0700)]
net_sched: avoid matching qdisc with zero handle
Davide found the following script triggers a NULL pointer
dereference:
ip l a name eth0 type dummy
tc q a dev eth0 parent :1 handle 1: htb
This is because for a freshly created netdevice noop_qdisc
is attached and when passing 'parent :1', kernel actually
tries to match the major handle which is 0 and noop_qdisc
has handle 0 so is matched by mistake. Commit 69012ae425d7
tries to fix a similar bug but still misses this case.
Handle 0 is not a valid one, should be just skipped. In
fact, kernel uses it as TC_H_UNSPEC.
Fixes: 69012ae425d7 ("net: sched: fix handling of singleton qdiscs with qdisc_hash") Fixes: 59cc1f61f09c ("net: sched:convert qdisc linked list to hashtable") Reported-by: Davide Caratti <dcaratti@redhat.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Eric Dumazet <edumazet@google.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Fri, 27 Oct 2017 18:13:29 +0000 (02:13 +0800)]
sctp: reset owner sk for data chunks on out queues when migrating a sock
Now when migrating sock to another one in sctp_sock_migrate(), it only
resets owner sk for the data in receive queues, not the chunks on out
queues.
It would cause that data chunks length on the sock is not consistent
with sk sk_wmem_alloc. When closing the sock or freeing these chunks,
the old sk would never be freed, and the new sock may crash due to
the overflow sk_wmem_alloc.
Although listen() should have returned error when one TCP-style socket
is in connecting (I may fix this one in another patch), it could also
be reproduced by peeling off an assoc.
This issue is there since very beginning.
This patch is to reset owner sk for the chunks on out queues so that
sk sk_wmem_alloc has correct value after accept one sock or peeloff
an assoc to one sock.
Note that when resetting owner sk for chunks on outqueue, it has to
sctp_clear_owner_w/skb_orphan chunks before changing assoc->base.sk
first and then sctp_set_owner_w them after changing assoc->base.sk,
due to that sctp_wfree and it's callees are using assoc->base.sk.
Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 29 Oct 2017 02:18:49 +0000 (11:18 +0900)]
Merge branch 'sockmap-fixes'
John Fastabend says:
====================
net: sockmap fixes
Last two fixes (as far as I know) for sockmap code this round.
First, we are using the qdisc cb structure when making the data end
calculation. This is really just wrong so, store it with the other
metadata in the correct tcp_skb_cb sturct to avoid breaking things.
Next, with recent work to attach multiple programs to a cgroup a
specific enumeration of return codes was agreed upon. However,
I wrote the sk_skb program types before seeing this work and used
a different convention. Patch 2 in the series aligns the return
codes to avoid breaking with this infrastructure and also aligns
with other programming conventions to avoid being the odd duck out
forcing programs to remember SK_SKB programs are different. Pusing
to net because its a user visible change. With this SK_SKB program
return codes are the same as other cgroup program types.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
John Fastabend [Fri, 27 Oct 2017 16:45:53 +0000 (09:45 -0700)]
bpf: rename sk_actions to align with bpf infrastructure
Recent additions to support multiple programs in cgroups impose
a strict requirement, "all yes is yes, any no is no". To enforce
this the infrastructure requires the 'no' return code, SK_DROP in
this case, to be 0.
To apply these rules to SK_SKB program types the sk_actions return
codes need to be adjusted.
This fix adds SK_PASS and makes 'SK_DROP = 0'. Finally, remove
SK_ABORTED to remove any chance that the API may allow aborted
program flows to be passed up the stack. This would be incorrect
behavior and allow programs to break existing policies.
Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
John Fastabend [Fri, 27 Oct 2017 16:45:34 +0000 (09:45 -0700)]
bpf: bpf_compute_data uses incorrect cb structure
SK_SKB program types use bpf_compute_data to store the end of the
packet data. However, bpf_compute_data assumes the cb is stored in the
qdisc layer format. But, for SK_SKB this is the wrong layer of the
stack for this type.
It happens to work (sort of!) because in most cases nothing happens
to be overwritten today. This is very fragile and error prone.
Fortunately, we have another hole in tcp_skb_cb we can use so lets
put the data_end value there.
Note, SK_SKB program types do not use data_meta, they are failed by
sk_skb_is_valid_access().
Signed-off-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sat, 28 Oct 2017 18:01:57 +0000 (11:01 -0700)]
Merge tag 'kbuild-fixes-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- fix O= building on dash
- remove unused dependency in Makefile
- fix default of a choice in Kconfig
- fix typos and documentation style
- fix command options unrecognized by sparse
* tag 'kbuild-fixes-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: clang: fix build failures with sparse check
kbuild doc: a bundle of fixes on makefiles.txt
Makefile: kselftest: fix grammar typo
kbuild: Fix optimization level choice default
kbuild: drop unused symverfile in Makefile.modpost
kbuild: revert $(realpath ...) to $(shell cd ... && /bin/pwd)
Linus Torvalds [Sat, 28 Oct 2017 17:56:13 +0000 (10:56 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input fixes from Dmitry Torokhov:
- fix gtco tablet driver, tightening parsing of HID descriptors
- add ACPI ID added to Elan driver to be able to handle touchpads found
in Lenovo Ideapad 320/520
- fix the Symaptics RMI4 driver to adjust handling of buttons
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: synaptics-rmi4 - limit the range of what GPIOs are buttons
Input: gtco - fix potential out-of-bound access
Input: elan_i2c - add ELAN0611 to the ACPI table
Linus Torvalds [Sat, 28 Oct 2017 17:46:20 +0000 (10:46 -0700)]
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Six fixes for mostly minor issues, most of which have small race
windows for occurring"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: Suppress a kernel warning in case the prep function returns BLKPREP_DEFER
scsi: sg: Re-fix off by one in sg_fill_request_table()
scsi: aacraid: Fix controller initialization failure
scsi: hpsa: Fix configured_logical_drive_count·check
scsi: qla2xxx: Initialize Work element before requesting IRQs
scsi: zfcp: fix erp_action use-before-initialize in REC action trace
David Howells [Wed, 11 Oct 2017 22:32:27 +0000 (23:32 +0100)]
assoc_array: Fix a buggy node-splitting case
This fixes CVE-2017-12193.
Fix a case in the assoc_array implementation in which a new leaf is
added that needs to go into a node that happens to be full, where the
existing leaves in that node cluster together at that level to the
exclusion of new leaf.
What needs to happen is that the existing leaves get moved out to a new
node, N1, at level + 1 and the existing node needs replacing with one,
N0, that has pointers to the new leaf and to N1.
The code that tries to do this gets this wrong in two ways:
(1) The pointer that should've pointed from N0 to N1 is set to point
recursively to N0 instead.
(2) The backpointer from N0 needs to be set correctly in the case N0 is
either the root node or reached through a shortcut.
Fix this by removing this path and using the split_node path instead,
which achieves the same end, but in a more general way (thanks to Eric
Biggers for spotting the redundancy).
The problem manifests itself as:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
IP: assoc_array_apply_edit+0x59/0xe5
Fixes: 3cb989501c26 ("Add a generic associative array implementation.") Reported-and-tested-by: WU Fan <u3536072@connect.hku.hk> Signed-off-by: David Howells <dhowells@redhat.com> Cc: stable@vger.kernel.org [v3.13-rc1+] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 28 Oct 2017 15:39:35 +0000 (08:39 -0700)]
Merge tag '4.14-smb3-fixes-for-stable' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Various SMB3 fixes for 4.14 and stable"
* tag '4.14-smb3-fixes-for-stable' of git://git.samba.org/sfrench/cifs-2.6:
SMB3: Validate negotiate request must always be signed
SMB: fix validate negotiate info uninitialised memory use
SMB: fix leak of validate negotiate info response buffer
CIFS: Fix NULL pointer deref on SMB2_tcon() failure
CIFS: do not send invalid input buffer on QUERY_INFO requests
cifs: Select all required crypto modules
CIFS: SMBD: Fix the definition for SMB2_CHANNEL_RDMA_V1_INVALIDATE
cifs: handle large EA requests more gracefully in smb2+
Fix encryption labels and lengths for SMB3.1.1
Linus Torvalds [Sat, 28 Oct 2017 15:29:29 +0000 (08:29 -0700)]
Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
Pull overlayfs fixes from Miklos Szeredi:
"Fix several issues, most of them introduced in the last release"
* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: do not cleanup unsupported index entries
ovl: handle ENOENT on index lookup
ovl: fix EIO from lookup of non-indexed upper
ovl: Return -ENOMEM if an allocation fails ovl_lookup()
ovl: add NULL check in ovl_alloc_inode
tap: reference to KVA of an unloaded module causes kernel panic
The commit 9a393b5d5988 ("tap: tap as an independent module") created a
separate tap module that implements tap functionality and exports
interfaces that will be used by macvtap and ipvtap modules to create
create respective tap devices.
However, that patch introduced a regression wherein the modules macvtap
and ipvtap can be removed (through modprobe -r) while there are
applications using the respective /dev/tapX devices. These applications
cause kernel to hold reference to /dev/tapX through 'struct cdev
macvtap_cdev' and 'struct cdev ipvtap_dev' defined in macvtap and ipvtap
modules respectively. So, when the application is later closed the
kernel panics because we are referencing KVA that is present in the
unloaded modules.
----------8<------- Example ----------8<----------
$ sudo ip li add name mv0 link enp7s0 type macvtap
$ sudo ip li show mv0 |grep mv0| awk -e '{print $1 $2}'
14:mv0@enp7s0:
$ cat /dev/tap14 &
$ lsmod |egrep -i 'tap|vlan'
macvtap 16384 0
macvlan 24576 1 macvtap
tap 24576 3 macvtap
$ sudo modprobe -r macvtap
$ fg
cat /dev/tap14
^C
<...system panics...>
BUG: unable to handle kernel paging request at ffffffffa038c500
IP: cdev_put+0xf/0x30
----------8<-----------------8<----------
The fix is to set cdev.owner to the module that creates the tap device
(either macvtap or ipvtap). With this set, the operations (in
fs/char_dev.c) on char device holds and releases the module through
cdev_get() and cdev_put() and will not allow the module to unload
prematurely.
Fixes: 9a393b5d5988ea4e (tap: tap as an independent module) Signed-off-by: Girish Moodalbail <girish.moodalbail@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Fri, 27 Oct 2017 04:21:40 +0000 (21:21 -0700)]
tcp: refresh tp timestamp before tcp_mtu_probe()
In the unlikely event tcp_mtu_probe() is sending a packet, we
want tp->tcp_mstamp being as accurate as possible.
This means we need to call tcp_mstamp_refresh() a bit earlier in
tcp_write_xmit().
Fixes: 385e20706fac ("tcp: use tp->tcp_mstamp in output path") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Jason Wang [Fri, 27 Oct 2017 03:05:44 +0000 (11:05 +0800)]
tuntap: properly align skb->head before building skb
An unaligned alloc_frag->offset caused by previous allocation will
result an unaligned skb->head. This will lead unaligned
skb_shared_info and then unaligned dataref which requires to be
aligned for accessing on some architecture. Fix this by aligning
alloc_frag->offset before the frag refilling.
Fixes: 0bbd7dad34f8 ("tun: make tun_build_skb() thread safe") Cc: Eric Dumazet <edumazet@google.com> Cc: Willem de Bruijn <willemdebruijn.kernel@gmail.com> Cc: Wei Wei <dotweiba@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Mark Rutland <mark.rutland@arm.com> Reported-by: Wei Wei <dotweiba@gmail.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sat, 28 Oct 2017 03:41:05 +0000 (20:41 -0700)]
Merge tag 'for-linus-4.14c-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
- a fix for the Xen gntdev device repairing an issue in case of partial
failure of mapping multiple pages of another domain
- a fix of a regression in the Xen balloon driver introduced in 4.13
- a build fix for Xen on ARM which will trigger e.g. for Linux RT
- a maintainers update for pvops (not really Xen, but carrying through
this tree just for convenience)
* tag 'for-linus-4.14c-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
maintainers: drop Chris Wright from pvops
arm/xen: don't inclide rwlock.h directly.
xen: fix booting ballooned down hvm guest
xen/gntdev: avoid out of bounds access in case of partial gntdev_mmap()
Linus Torvalds [Sat, 28 Oct 2017 03:38:47 +0000 (20:38 -0700)]
Merge tag 'arc-4.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC fixes from Vineet Gupta:
- Fixes for HSDK platform
- module build error for !LLSC config
* tag 'arc-4.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: unbork module link errors with !CONFIG_ARC_HAS_LLSC
ARC: [plat-hsdk] Increase SDIO CIU frequency to 50000000Hz
ARC: [plat-hsdk] select CONFIG_RESET_HSDK from Kconfig
Linus Torvalds [Sat, 28 Oct 2017 03:35:31 +0000 (20:35 -0700)]
Fix tracing sample code warning.
Commit 6575257c60e1 ("tracing/samples: Fix creation and deletion of
simple_thread_fn creation") introduced a new warning due to using a
boolean as a counter.
Just make it "int".
Fixes: 6575257c60e1 ("tracing/samples: Fix creation and deletion of simple_thread_fn creation") Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 28 Oct 2017 00:19:39 +0000 (17:19 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Misc fixes:
- revert a /dev/mem restriction change that crashes with certain boot
parameters
- an AMD erratum fix for cases where the BIOS doesn't apply it
- fix unwinder debuginfo
- improve ORC unwinder warning printouts"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
Revert "x86/mm: Limit mmap() of /dev/mem to valid physical addresses"
x86/unwind: Show function name+offset in ORC error messages
x86/entry: Fix idtentry unwind hint
x86/cpu/AMD: Apply the Erratum 688 fix when the BIOS doesn't
Linus Torvalds [Sat, 28 Oct 2017 00:17:25 +0000 (17:17 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
"Update the <linux/swait.h> documentation to discourage their use"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/swait: Document it clearly that the swait facilities are special and shouldn't be used
Linus Torvalds [Sat, 28 Oct 2017 00:15:49 +0000 (17:15 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fix from Ingo Molnar:
"A fix for a misplaced permission check that can leave perf PT or LBR
disabled (on Intel CPUs) permanently until the next reboot"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel/bts: Fix exclusive event reference leak
Linus Torvalds [Sat, 28 Oct 2017 00:14:32 +0000 (17:14 -0700)]
Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fixes from Ingo Molnar:
"Two fixes: an ARM fix for KASLR interaction with hibernation, plus an
efi_test crash fix"
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/libstub/arm: Don't randomize runtime regions when CONFIG_HIBERNATION=y
efi/efi_test: Prevent an Oops in efi_runtime_query_capsulecaps()
Andrew Duggan [Wed, 25 Oct 2017 16:30:16 +0000 (09:30 -0700)]
Input: synaptics-rmi4 - limit the range of what GPIOs are buttons
By convention the first 6 bits of F30 Ctrl 2 and 3 are used to signify
GPIOs which are connected to buttons. Additional GPIOs may be used as
input GPIOs to signal the touch controller of some event
(ie disable touchpad). These additional GPIOs may meet the criteria of
a button in rmi_f30_is_valid_button() but should not be considered
buttons. This patch limits the GPIOs which are mapped to buttons to just
the first 6.
Signed-off-by: Andrew Duggan <aduggan@synaptics.com> Reported-by: Daniel Martin <consume.noise@gmail.com> Tested-by: Daniel Martin <consume.noise@gmail.com> Acked-By: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Dmitry Torokhov [Mon, 23 Oct 2017 23:46:00 +0000 (16:46 -0700)]
Input: gtco - fix potential out-of-bound access
parse_hid_report_descriptor() has a while (i < length) loop, which
only guarantees that there's at least 1 byte in the buffer, but the
loop body can read multiple bytes which causes out-of-bounds access.
David S. Miller [Fri, 27 Oct 2017 15:05:34 +0000 (00:05 +0900)]
Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-queue
Jeff Kirsher says:
====================
Intel Wired LAN Driver Updates 2017-10-26
This series contains fixes to e1000, igb, ixgbe and i40e.
Vincenzo Maffione fixes a potential race condition which would result in
the interface being up but transmits are disabled in the hardware.
Colin Ian King fixes a possible NULL pointer dereference in e1000, which
was found by Coverity.
Jean-Philippe Brucker fixes a possible kernel panic when a driver cannot
map a transmit buffer, which is caused by an erroneous test.
Alex provides a fix for ixgbe, which is a partial revert of the commit ffed21bcee7a ("ixgbe: Don't bother clearing buffer memory for descriptor rings")
because the previous commit messed up the exception handling path by
adding the count back in when we did not need to. Also fixed a typo,
where the transmit ITR setting was being used to determine if we were
using adaptive receive interrupt moderation or not. Lastly, fixed a
memory leak by including programming descriptors in the cleaned count.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Thu, 26 Oct 2017 11:27:17 +0000 (19:27 +0800)]
ip6_gre: update dst pmtu if dev mtu has been updated by toobig in __gre6_xmit
When receiving a Toobig icmpv6 packet, ip6gre_err would just set
tunnel dev's mtu, that's not enough. For skb_dst(skb)'s pmtu may
still be using the old value, it has no chance to be updated with
tunnel dev's mtu.
Jianlin found this issue by reducing route's mtu while running
netperf, the performance went to 0.
ip6ip6 and ip4ip6 tunnel can work well with this, as they lookup
the upper dst and update_pmtu it's pmtu or icmpv6_send a Toobig
to upper socket after setting tunnel dev's mtu.
We couldn't do that for ip6_gre, as gre's inner packet could be
any protocol, it's difficult to handle them (like lookup upper
dst) in a good way.
So this patch is to fix it by updating skb_dst(skb)'s pmtu when
dev->mtu < skb_dst(skb)'s pmtu in tx path. It's safe to do this
update there, as usually dev->mtu <= skb_dst(skb)'s pmtu and no
performance regression can be caused by this.
Fixes: c12b395a4664 ("gre: Support GRE over IPv6") Reported-by: Jianlin Shi <jishi@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Thu, 26 Oct 2017 11:23:27 +0000 (19:23 +0800)]
ip6_gre: only increase err_count for some certain type icmpv6 in ip6gre_err
The similar fix in patch 'ipip: only increase err_count for some
certain type icmp in ipip_err' is needed for ip6gre_err.
In Jianlin's case, udp netperf broke even when receiving a TooBig
icmpv6 packet.
Fixes: c12b395a4664 ("gre: Support GRE over IPv6") Reported-by: Jianlin Shi <jishi@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Thu, 26 Oct 2017 11:19:56 +0000 (19:19 +0800)]
ipip: only increase err_count for some certain type icmp in ipip_err
t->err_count is used to count the link failure on tunnel and an err
will be reported to user socket in tx path if t->err_count is not 0.
udp socket could even return EHOSTUNREACH to users.
Since commit fd58156e456d ("IPIP: Use ip-tunneling code.") removed
the 'switch check' for icmp type in ipip_err(), err_count would be
increased by the icmp packet with ICMP_EXC_FRAGTIME code. an link
failure would be reported out due to this.
In Jianlin's case, when receiving ICMP_EXC_FRAGTIME a icmp packet,
udp netperf failed with the err:
send_data: data send error: No route to host (errno 113)
We expect this error reported from tunnel to socket when receiving
some certain type icmp, but not ICMP_EXC_FRAGTIME, ICMP_SR_FAILED
or ICMP_PARAMETERPROB ones.
This patch is to bring 'switch check' for icmp type back to ipip_err
so that it only reports link failure for the right type icmp, just as
in ipgre_err() and ipip6_err().
Fixes: fd58156e456d ("IPIP: Use ip-tunneling code.") Reported-by: Jianlin Shi <jishi@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Jose Abreu [Thu, 26 Oct 2017 09:07:12 +0000 (10:07 +0100)]
net: stmmac: First Queue must always be in DCB mode
According to DWMAC databook the first queue operating mode
must always be in DCB.
As MTL_QUEUE_DCB = 1, we need to always set the first queue
operating mode to DCB otherwise driver will think that queue
is in AVB mode (because MTL_QUEUE_AVB = 0).
Signed-off-by: Jose Abreu <joabreu@synopsys.com> Cc: Joao Pinto <jpinto@synopsys.com> Cc: David S. Miller <davem@davemloft.net> Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com> Cc: Alexandre Torgue <alexandre.torgue@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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