Tao Ren [Wed, 24 Apr 2019 01:43:32 +0000 (01:43 +0000)]
net/ncsi: handle overflow when incrementing mac address
Previously BMC's MAC address is calculated by simply adding 1 to the
last byte of network controller's MAC address, and it produces incorrect
result when network controller's MAC address ends with 0xFF.
The problem can be fixed by calling eth_addr_inc() function to increment
MAC address; besides, the MAC address is also validated before assigning
to BMC.
Fixes: 7afc4a939316 ("net/ncsi: Add NCSI Broadcom OEM command") Signed-off-by: Tao Ren <taoren@fb.com> Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
net: socionext: replace napi_alloc_frag with the netdev variant on init
The netdev variant is usable on any context since it disables interrupts.
The napi variant of the call should only be used within softirq context.
Replace napi_alloc_frag on driver init with the correct netdev_alloc_frag
call
Changes since v1:
- Adjusted commit message
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Jassi Brar <jaswinder.singh@linaro.org> Fixes: ac35469234d1 ("net: socionext: different approach on DMA") Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Gomez [Mon, 22 Apr 2019 19:08:04 +0000 (21:08 +0200)]
spi: ST ST95HF NFC: declare missing of table
Add missing <of_device_id> table for SPI driver relying on SPI
device match since compatible is in a DT binding or in a DTS.
Before this patch:
modinfo drivers/nfc/st95hf/st95hf.ko | grep alias
alias: spi:st95hf
After this patch:
modinfo drivers/nfc/st95hf/st95hf.ko | grep alias
alias: spi:st95hf
alias: of:N*T*Cst,st95hfC*
alias: of:N*T*Cst,st95hf
Reported-by: Javier Martinez Canillas <javier@dowhile0.org> Signed-off-by: Daniel Gomez <dagmcr@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Gomez [Mon, 22 Apr 2019 19:08:03 +0000 (21:08 +0200)]
spi: Micrel eth switch: declare missing of table
Add missing <of_device_id> table for SPI driver relying on SPI
device match since compatible is in a DT binding or in a DTS.
Before this patch:
modinfo drivers/net/phy/spi_ks8995.ko | grep alias
alias: spi:ksz8795
alias: spi:ksz8864
alias: spi:ks8995
After this patch:
modinfo drivers/net/phy/spi_ks8995.ko | grep alias
alias: spi:ksz8795
alias: spi:ksz8864
alias: spi:ks8995
alias: of:N*T*Cmicrel,ksz8795C*
alias: of:N*T*Cmicrel,ksz8795
alias: of:N*T*Cmicrel,ksz8864C*
alias: of:N*T*Cmicrel,ksz8864
alias: of:N*T*Cmicrel,ks8995C*
alias: of:N*T*Cmicrel,ks8995
Reported-by: Javier Martinez Canillas <javier@dowhile0.org> Signed-off-by: Daniel Gomez <dagmcr@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
net: stmmac: move stmmac_check_ether_addr() to driver probe
stmmac_check_ether_addr() checks the MAC address and assigns one in
driver open(). In many cases when we create slave netdevice, the dev
addr is inherited from master but the master dev addr maybe NULL at
that time, so move this call to driver probe so that address is
always valid.
Signed-off-by: Xiaofei Shen <xiaofeis@codeaurora.org> Tested-by: Xiaofei Shen <xiaofeis@codeaurora.org> Signed-off-by: Sneh Shah <snehshah@codeaurora.org> Signed-off-by: Vinod Koul <vkoul@kernel.org> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Andrei Vagin [Wed, 17 Apr 2019 16:49:44 +0000 (09:49 -0700)]
netfilter: fix nf_l4proto_log_invalid to log invalid packets
It doesn't log a packet if sysctl_log_invalid isn't equal to protonum
OR sysctl_log_invalid isn't equal to IPPROTO_RAW. This sentence is
always true. I believe we need to replace OR to AND.
Cc: Florian Westphal <fw@strlen.de> Fixes: 7259705df754e ("netfilter: conntrack: add and use nf_l4proto_log_invalid") Signed-off-by: Andrei Vagin <avagin@gmail.com> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
setting net.netfilter.nf_conntrack_timestamp=1 breaks xmit with fq
scheduler. skb->tstamp might be "refreshed" using ktime_get_real(),
but fq expects CLOCK_MONOTONIC.
This patch removes all places in netfilter that check/set skb->tstamp:
1. To fix the bogus "start" time seen with conntrack timestamping for
outgoing packets, never use skb->tstamp and always use current time.
2. In nfqueue and nflog, only use skb->tstamp for incoming packets,
as determined by current hook (prerouting, input, forward).
3. xt_time has to use system clock as well rather than skb->tstamp.
We could still use skb->tstamp for prerouting/input/foward, but
I see no advantage to make this conditional.
Fixes: 8932dea156bd ("tcp/fq: move back to CLOCK_MONOTONIC") Cc: Eric Dumazet <edumazet@google.com> Reported-by: Michal Soltys <soltys@ziu.info> Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Documentation: decnet: remove reference to CONFIG_DECNET_ROUTE_FWMARK
CONFIG_DECNET_ROUTE_FWMARK was removed in commit e613acd6a6b0 ("[NET]: Rethink mark field in struct flowi")
Since nothing replace it (and nothindg need to replace it, simply remove
it from documentation.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com> Signed-off-by: David S. Miller <davem@davemloft.net>
dt-bindings: add an explanation for internal phy-mode
When working on the Allwinner internal PHY, the first work was to use
the "internal" mode, but some answer was made my mail on what are really
internal mean for PHY.
This patch write that in the doc.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Jakub Kicinski [Fri, 19 Apr 2019 23:52:19 +0000 (16:52 -0700)]
net/tls: don't leak IV and record seq when offload fails
When device refuses the offload in tls_set_device_offload_rx()
it calls tls_sw_free_resources_rx() to clean up software context
state.
Unfortunately, tls_sw_free_resources_rx() does not free all
the state tls_set_sw_offload() allocated - it leaks IV and
sequence number buffers. All other code paths which lead to
tls_sw_release_resources_rx() (which tls_sw_free_resources_rx()
calls) free those right before the call.
Avoid the leak by moving freeing of iv and rec_seq into
tls_sw_release_resources_rx().
Fixes: 81b6ef1732a9 ("tls: Add rx inline crypto offload") Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Jakub Kicinski [Fri, 19 Apr 2019 23:51:38 +0000 (16:51 -0700)]
net/tls: avoid potential deadlock in tls_set_device_offload_rx()
If device supports offload, but offload fails tls_set_device_offload_rx()
will call tls_sw_free_resources_rx() which (unhelpfully) releases
and reacquires the socket lock.
For a small fix release and reacquire the device_offload_lock.
Fixes: 81b6ef1732a9 ("tls: Add rx inline crypto offload") Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Po-Hsu Lin [Fri, 19 Apr 2019 11:01:13 +0000 (19:01 +0800)]
selftests/net: correct the return value for run_afpackettests
The run_afpackettests will be marked as passed regardless the return
value of those sub-tests in the script:
--------------------
running psock_tpacket test
--------------------
[FAIL]
selftests: run_afpackettests [PASS]
Fix this by changing the return value for each tests.
Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Hangbin Liu [Fri, 19 Apr 2019 06:31:00 +0000 (14:31 +0800)]
team: fix possible recursive locking when add slaves
If we add a bond device which is already the master of the team interface,
we will hold the team->lock in team_add_slave() first and then request the
lock in team_set_mac_address() again. The functions are called like:
Although team_upper_dev_link() would check the upper devices but it is
called too late. Fix it by adding a checking before processing the slave.
v2: Do not split the string in netdev_err()
Fixes: 88d4fc0ae093 ("net: introduce ethernet teaming device") Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
MLX5E_XDP_MAX_MTU was calculated incorrectly. It didn't account for
NET_IP_ALIGN and MLX5E_HW2SW_MTU, and it also misused MLX5_SKB_FRAG_SZ.
This commit fixes the calculations and adds a brief explanation for the
formula used.
Fixes: 5d6f6b78b8cf7 ("net/mlx5e: Restrict the combination of large MTU and XDP") Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
net/mlx5e: Fix use-after-free after xdp_return_frame
xdp_return_frame releases the frame. It leads to releasing the page, so
it's not allowed to access xdpi.xdpf->len after that, because xdpi.xdpf
is at xdp->data_hard_start after convert_to_xdp_frame. This patch moves
the memory access to precede the return of the frame.
Fixes: a13d5a30f715f ("net/mlx5e: Add support for XDP_REDIRECT in device-out side") Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Petr Štetiar [Wed, 17 Apr 2019 20:09:12 +0000 (22:09 +0200)]
of_net: Fix residues after of_get_nvmem_mac_address removal
I've discovered following discrepancy in the bindings/net/ethernet.txt
documentation, where it states following:
- nvmem-cells: phandle, reference to an nvmem node for the MAC address;
- nvmem-cell-names: string, should be "mac-address" if nvmem is to be..
which is actually misleading and confusing. There are only two ethernet
drivers in the tree, cadence/macb and davinci which supports this
properties.
This nvmem-cell* properties were introduced in commit fb2f710726f1
("of_net: Implement of_get_nvmem_mac_address helper"), but
commit 6d56c5c1cd54 ("of: net: kill of_get_nvmem_mac_address()")
forget to properly clean up this parts.
So this patch fixes the documentation by moving the nvmem-cell*
properties at the appropriate places. While at it, I've removed unused
include as well.
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com> Fixes: 6d56c5c1cd54 ("of: net: kill of_get_nvmem_mac_address()") Signed-off-by: Petr Štetiar <ynezz@true.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
Jakub Kicinski [Wed, 17 Apr 2019 17:51:19 +0000 (10:51 -0700)]
net/tls: fix refcount adjustment in fallback
Unlike atomic_add(), refcount_add() does not deal well
with a negative argument. TLS fallback code reallocates
the skb and is very likely to shrink the truesize, leading to:
Once wmem_allocated count saturates the application can no longer
send data on the socket. This is similar to Eric's fixes for GSO,
TCP:
commit c2385c1dc7a8 ("tcp: gso: avoid refcount_t warning from tcp_gso_segment()")
and UDP:
commit 8804807ca6f3 ("udp: avoid refcount_t saturation in __udp_gso_segment()").
Unlike the GSO case, for TLS fallback it's likely that the skb has
shrunk, so the "likely" annotation is the other way around (likely
branch being "sub").
Fixes: e31ec02c9978 ("net/tls: Add generic NIC offload infrastructure") Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: John Hurley <john.hurley@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Su Bao Cheng [Thu, 18 Apr 2019 09:14:56 +0000 (11:14 +0200)]
stmmac: pci: Adjust IOT2000 matching
Since there are more IOT2040 variants with identical hardware but
different asset tags, the asset tag matching should be adjusted to
support them.
For the board name "SIMATIC IOT2000", currently there are 2 types of
hardware, IOT2020 and IOT2040. The IOT2020 is identified by its unique
asset tag. Match on it first. If we then match on the board name only,
we will catch all IOT2040 variants. In the future there will be no other
devices with the "SIMATIC IOT2000" DMI board name but different
hardware.
Signed-off-by: Su Bao Cheng <baocheng.su@siemens.com> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: David S. Miller <davem@davemloft.net>
There is a spelling mistake in a NL_SET_ERR_MSG_MOD error message,
fix it.
Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Mukesh Ojha <mojha@codeaurora.org> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Thu, 18 Apr 2019 17:37:30 +0000 (10:37 -0700)]
Merge branch 'mlxsw-Few-small-fixes'
Ido Schimmel says:
====================
mlxsw: Few small fixes
Patch #1, from Petr, adjusts mlxsw to provide the same QoS behavior for
both Spectrum-1 and Spectrum-2. The fix is required due to a difference
in the behavior of Spectrum-2 compared to Spectrum-1. The problem and
solution are described in the detail in the changelog.
Patch #2 increases the time period in which the driver waits for the
firmware to signal it has finished its initialization. The issue will be
fixed in future firmware versions and the timeout will be decreased.
Patch #3, from Amit, fixes a display problem where the autoneg status in
ethtool is not updated in case the netdev is not running.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Amit Cohen [Thu, 18 Apr 2019 07:14:16 +0000 (07:14 +0000)]
mlxsw: spectrum: Fix autoneg status in ethtool
If link is down and autoneg is set to on/off, the status in ethtool does
not change.
The reason is when the link is down the function returns with zero
before changing autoneg value.
Move the checking of link state (up/down) to be performed after setting
autoneg value, in order to be sure that autoneg will change in any case.
Fixes: a3f159160767 ("mlxsw: spectrum: Add initial support for Spectrum ASIC") Signed-off-by: Amit Cohen <amitc@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
During driver initialization the driver sends a reset to the device and
waits for the firmware to signal that it is ready to continue.
Commit 56652e672d91 ("mlxsw: pci: Increase PCI SW reset timeout")
increased the timeout to 13 seconds due to longer PHY calibration in
Spectrum-2 compared to Spectrum-1.
Recently it became apparent that this timeout is too short and therefore
this patch increases it again to a safer limit that will be reduced in
the future.
Fixes: 93ea014b72c4 ("mlxsw: spectrum: Extend to support Spectrum-2 ASIC") Fixes: 56652e672d91 ("mlxsw: pci: Increase PCI SW reset timeout") Signed-off-by: Ido Schimmel <idosch@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Petr Machata [Thu, 18 Apr 2019 07:14:13 +0000 (07:14 +0000)]
mlxsw: spectrum: Put MC TCs into DWRR mode
Both Spectrum-1 and Spectrum-2 chips are currently configured such that
pairs of TC n (which is used for UC traffic) and TC n+8 (which is used
for MC traffic) are feeding into the same subgroup. Strict
prioritization is configured between the two TCs, and by enabling
MC-aware mode on the switch, the lower-numbered (UC) TCs are favored
over the higher-numbered (MC) TCs.
On Spectrum-2 however, there is an issue in configuration of the
MC-aware mode. As a result, MC traffic is prioritized over UC traffic.
To work around the issue, configure the MC TCs with DWRR mode (while
keeping the UC TCs in strict mode).
With this patch, the multicast-unicast arbitration results in the same
behavior on both Spectrum-1 and Spectrum-2 chips.
Fixes: 5a5bc736ee39 ("mlxsw: spectrum: Configure MC-aware mode on mlxsw ports") Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
clang points out that the return code from this function is
undefined for one of the error paths:
../drivers/s390/net/ctcm_main.c:1595:7: warning: variable 'result' is used uninitialized whenever 'if' condition is true
[-Wsometimes-uninitialized]
if (priv->channel[direction] == NULL) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../drivers/s390/net/ctcm_main.c:1638:9: note: uninitialized use occurs here
return result;
^~~~~~
../drivers/s390/net/ctcm_main.c:1595:3: note: remove the 'if' if its condition is always false
if (priv->channel[direction] == NULL) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../drivers/s390/net/ctcm_main.c:1539:12: note: initialize the variable 'result' to silence this warning
int result;
^
Make it return -ENODEV here, as in the related failure cases.
gcc has a known bug in underreporting some of these warnings
when it has already eliminated the assignment of the return code
based on some earlier optimization step.
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
There are a couple of spelling mistakes in NL_SET_ERR_MSG_MOD error
messages. Fix these.
Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Mukesh Ojha <mojha@codeaurora.org> Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/stmicro/stmmac/norm_desc.c: In function ndesc_init_rx_desc:
drivers/net/ethernet/stmicro/stmmac/norm_desc.c:138:6: warning: variable 'bfsize1' set but not used [-Wunused-but-set-variable]
Like enh_desc_init_rx_desc, we should use bfsize1
in ndesc_init_rx_desc to calculate 'p->des1'
Fixes: 67dab1e4e90d ("net: stmmac: use correct DMA buffer size in the RX descriptor") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Reviewed-by: Aaro Koskinen <aaro.koskinen@nokia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
ipv4: set the tcp_min_rtt_wlen range from 0 to one day
There is a UBSAN report as below:
UBSAN: Undefined behaviour in net/ipv4/tcp_input.c:2877:56
signed integer overflow: 2147483647 * 1000 cannot be represented in type 'int'
CPU: 3 PID: 0 Comm: swapper/3 Not tainted 5.1.0-rc4-00058-g582549e #1
Call Trace:
<IRQ>
dump_stack+0x8c/0xba
ubsan_epilogue+0x11/0x60
handle_overflow+0x12d/0x170
? ttwu_do_wakeup+0x21/0x320
__ubsan_handle_mul_overflow+0x12/0x20
tcp_ack_update_rtt+0x76c/0x780
tcp_clean_rtx_queue+0x499/0x14d0
tcp_ack+0x69e/0x1240
? __wake_up_sync_key+0x2c/0x50
? update_group_capacity+0x50/0x680
tcp_rcv_established+0x4e2/0xe10
tcp_v4_do_rcv+0x22b/0x420
tcp_v4_rcv+0xfe8/0x1190
ip_protocol_deliver_rcu+0x36/0x180
ip_local_deliver+0x15b/0x1a0
ip_rcv+0xac/0xd0
__netif_receive_skb_one_core+0x7f/0xb0
__netif_receive_skb+0x33/0xc0
netif_receive_skb_internal+0x84/0x1c0
napi_gro_receive+0x2a0/0x300
receive_buf+0x3d4/0x2350
? detach_buf_split+0x159/0x390
virtnet_poll+0x198/0x840
? reweight_entity+0x243/0x4b0
net_rx_action+0x25c/0x770
__do_softirq+0x19b/0x66d
irq_exit+0x1eb/0x230
do_IRQ+0x7a/0x150
common_interrupt+0xf/0xf
</IRQ>
It can be reproduced by:
echo 2147483647 > /proc/sys/net/ipv4/tcp_min_rtt_wlen
Fixes: 50bc59fc34442 ("tcp: track min RTT using windowed min-filter") Signed-off-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Merge tag 'for-linus-5.1-2' of git://github.com/cminyard/linux-ipmi
Pull IPMI fixes from Corey Minyard:
"Fixes for some bugs cause by recent changes. One crash if you feed bad
data to the module parameters, one BUG that sometimes occurs when a
user closes the connection, and one bug that cause the driver to not
work if the configuration information only comes in from SMBIOS"
* tag 'for-linus-5.1-2' of git://github.com/cminyard/linux-ipmi:
ipmi: fix sleep-in-atomic in free_user at cleanup SRCU user->release_barrier
ipmi: ipmi_si_hardcode.c: init si_type array to fix a crash
ipmi: Fix failure on SMBIOS specified devices
It looks like the new socket options only work correctly
for native execution, but in case of compat mode fall back
to the old behavior as we ignore the 'old_timeval' flag.
Rework so we treat SO_RCVTIMEO_NEW/SO_SNDTIMEO_NEW the
same way in compat and native 32-bit mode.
Cc: Deepa Dinamani <deepa.kernel@gmail.com> Fixes: 8c22177fbf47 ("sock: Add SO_RCVTIMEO_NEW and SO_SNDTIMEO_NEW") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Tue, 16 Apr 2019 17:55:20 +0000 (10:55 -0700)]
tcp: tcp_grow_window() needs to respect tcp_space()
For some reason, tcp_grow_window() correctly tests if enough room
is present before attempting to increase tp->rcv_ssthresh,
but does not prevent it to grow past tcp_space()
This is causing hard to debug issues, like failing
the (__tcp_select_window(sk) >= tp->rcv_wnd) test
in __tcp_ack_snd_check(), causing ACK delays and possibly
slow flows.
Depending on tcp_rmem[2], MTU, skb->len/skb->truesize ratio,
we can see the problem happening on "netperf -t TCP_RR -- -r 2000,2000"
after about 60 round trips, when the active side no longer sends
immediate acks.
This bug predates git history.
Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Wei Wang <weiwan@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This is preventive cleanup that may save troubles later.
No need to cancel repeateadly queued work if code is properly
refactored.
Don't let the ethtool -s process interfere with the stat workqueue
scheduling.
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
net: bridge: fix netlink export of vlan_stats_per_port option
Since the introduction of the vlan_stats_per_port option the netlink
export of it has been broken since I made a typo and used the ifla
attribute instead of the bridge option to retrieve its state.
Sysfs export is fine, only netlink export has been affected.
Fixes: d16db5fb04b87 ("net: bridge: add support for per-port vlan stats") Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Colin Ian King [Tue, 16 Apr 2019 11:43:17 +0000 (12:43 +0100)]
qed: fix spelling mistake "faspath" -> "fastpath"
There is a spelling mistake in a DP_INFO message, fix it.
Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Mukesh Ojha <mojha@codeaurora.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Jie Liu [Tue, 16 Apr 2019 05:10:09 +0000 (13:10 +0800)]
tipc: set sysctl_tipc_rmem and named_timeout right range
We find that sysctl_tipc_rmem and named_timeout do not have the right minimum
setting. sysctl_tipc_rmem should be larger than zero, like sysctl_tcp_rmem.
And named_timeout as a timeout setting should be not less than zero.
Fixes: d5892496e769d ("tipc: change socket buffer overflow control to respect sk_rcvbuf") Fixes: d95602310bd59 ("tipc: add name distributor resiliency queue") Signed-off-by: Jie Liu <liujie165@huawei.com> Reported-by: Qiang Ning <ningqiang1@huawei.com> Reviewed-by: Zhiqiang Liu <liuzhiqiang26@huawei.com> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
According to the link FSM, when a link endpoint got RESET_MSG (- a
traditional one without the stopping bit) from its peer, it moves to
PEER_RESET state and raises a LINK_DOWN event which then resets the
link itself. Its state will become ESTABLISHING after the reset event
and the link will be re-established soon after this endpoint starts to
send ACTIVATE_MSG to the peer.
There is no problem with this mechanism, however the link resetting has
cleared the link 'in_session' flag (along with the other important link
data such as: the link 'mtu') that was correctly set up at the 1st step
(i.e. when this endpoint received the peer RESET_MSG). As a result, the
link will become ESTABLISHED, but the 'in_session' flag is not set, and
all STATE_MSG from its peer will be dropped at the link_validate_msg().
It means the link not synced and will sooner or later face a failure.
Since the link reset action is obviously needed for a new link session
(this is also true in the other situations), the problem here is that
the link is re-established a bit too early when the link endpoints are
not really in-sync yet. The commit forces a resync as already done in
the previous commit 2ffee6740a8e ("tipc: fix link session and
re-establish issues") by simply varying the link 'peer_session' value
at the link_reset().
Acked-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
net: Fix missing meta data in skb with vlan packet
skb_reorder_vlan_header() should move XDP meta data with ethernet header
if XDP meta data exists.
Fixes: c422ef92eaf8 ("bpf: add meta pointer for direct access") Signed-off-by: Yuya Kusakabe <yuya.kusakabe@gmail.com> Signed-off-by: Takeru Hayasaka <taketarou2@gmail.com> Co-developed-by: Takeru Hayasaka <taketarou2@gmail.com> Reviewed-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
Fix this by sanitizing arg before using it to index dev_lec.
Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].
net/core: work around section mismatch warning for ptp_classifier
The routine ptp_classifier_init() uses an initializer for an
automatic struct type variable which refers to an __initdata
symbol. This is perfectly legal, but may trigger a section
mismatch warning when running the compiler in -fpic mode, due
to the fact that the initializer may be emitted into an anonymous
.data section thats lack the __init annotation. So work around it
by using assignments instead.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
When the commit below was introduced it changed two visible things:
- the skb was no longer passed through the protocol handlers with the
original device
- the skb was passed up the stack with skb->dev = bridge
The first change broke af_packet sockets on bridge ports. For example we
use them for hostapd which listens for ETH_P_PAE packets on the ports.
We discussed two possible fixes:
- create a clone and pass it through NF_HOOK(), act on the original skb
based on the result
- somehow signal to the caller from the okfn() that it was called,
meaning the skb is ok to be passed, which this patch is trying to
implement via returning 1 from the bridge link-local okfn()
Note that we rely on the fact that NF_QUEUE/STOLEN would return 0 and
drop/error would return < 0 thus the okfn() is called only when the
return was 1, so we signal to the caller that it was called by preserving
the return value from nf_hook().
Fixes: ee08ac34afb6 ("bridge: fix potential use-after-free when hook returns QUEUE or STOLEN verdict") Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Tony Camuso [Tue, 9 Apr 2019 19:20:03 +0000 (15:20 -0400)]
ipmi: ipmi_si_hardcode.c: init si_type array to fix a crash
The intended behavior of function ipmi_hardcode_init_one() is to default
to kcs interface when no type argument is presented when initializing
ipmi with hard coded addresses.
However, the array of char pointers allocated on the stack by function
ipmi_hardcode_init() was not inited to zeroes, so it contained stack
debris.
Consequently, passing the cruft stored in this array to function
ipmi_hardcode_init_one() caused a crash when it was unable to detect
that the char * being passed was nonsense and tried to access the
address specified by the bogus pointer.
The fix is simply to initialize the si_type array to zeroes, so if
there were no type argument given to at the command line, function
ipmi_hardcode_init_one() could properly default to the kcs interface.
Signed-off-by: Tony Camuso <tcamuso@redhat.com>
Message-Id: <1554837603-40299-1-git-send-email-tcamuso@redhat.com> Signed-off-by: Corey Minyard <cminyard@mvista.com>
Merge tag 'riscv-for-linus-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux
Pull RISC-V fixes from Palmer Dabbelt:
"This contains an assortment of RISC-V-related fixups that we found
after rc4. They're all really unrelated:
- The addition of a 32-bit defconfig, to emphasize testing the 32-bit
port.
- A device tree bindings patch, which is pre-work for some patches
that target 5.2.
- A fix to support booting on systems with more physical memory than
the maximum supported by the kernel"
* tag 'riscv-for-linus-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
RISC-V: Fix Maximum Physical Memory 2GiB option for 64bit systems
dt-bindings: clock: sifive: add FU540-C000 PRCI clock constants
RISC-V: Add separate defconfig for 32bit systems
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
"5.1 keeps its reputation as a big bugfix release for KVM x86.
- Fix for a memory leak introduced during the merge window
- Fixes for nested VMX with ept=0
- Fixes for AMD (APIC virtualization, NMI injection)
- Fixes for Hyper-V under KVM and KVM under Hyper-V
- Fixes for 32-bit SMM and tests for SMM virtualization
- More array_index_nospec peppering"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (21 commits)
KVM: x86: avoid misreporting level-triggered irqs as edge-triggered in tracing
KVM: fix spectrev1 gadgets
KVM: x86: fix warning Using plain integer as NULL pointer
selftests: kvm: add a selftest for SMM
selftests: kvm: fix for compilers that do not support -no-pie
selftests: kvm/evmcs_test: complete I/O before migrating guest state
KVM: x86: Always use 32-bit SMRAM save state for 32-bit kernels
KVM: x86: Don't clear EFER during SMM transitions for 32-bit vCPU
KVM: x86: clear SMM flags before loading state while leaving SMM
KVM: x86: Open code kvm_set_hflags
KVM: x86: Load SMRAM in a single shot when leaving SMM
KVM: nVMX: Expose RDPMC-exiting only when guest supports PMU
KVM: x86: Raise #GP when guest vCPU do not support PMU
x86/kvm: move kvm_load/put_guest_xcr0 into atomic context
KVM: x86: svm: make sure NMI is injected after nmi_singlestep
svm/avic: Fix invalidate logical APIC id entry
Revert "svm: Fix AVIC incomplete IPI emulation"
kvm: mmu: Fix overflow on kvm mmu page limit calculation
KVM: nVMX: always use early vmcs check when EPT is disabled
KVM: nVMX: allow tests to use bad virtual-APIC page address
...
Vitaly Kuznetsov [Wed, 27 Mar 2019 14:12:20 +0000 (15:12 +0100)]
KVM: x86: avoid misreporting level-triggered irqs as edge-triggered in tracing
In __apic_accept_irq() interface trig_mode is int and actually on some code
paths it is set above u8:
kvm_apic_set_irq() extracts it from 'struct kvm_lapic_irq' where trig_mode
is u16. This is done on purpose as e.g. kvm_set_msi_irq() sets it to
(1 << 15) & e->msi.data
kvm_apic_local_deliver sets it to reg & (1 << 15).
Fix the immediate issue by making 'tm' into u16. We may also want to adjust
__apic_accept_irq() interface and use proper sizes for vector, level,
trig_mode but this is not urgent.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add a simple test for SMM, based on VMX. The test implements its own
sync between the guest and the host as using our ucall library seems to
be too cumbersome: SMI handler is happening in real-address mode.
This patch also fixes KVM_SET_NESTED_STATE to happen after
KVM_SET_VCPU_EVENTS, in fact it places it last. This is because
KVM needs to know whether the processor is in SMM or not.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 11 Apr 2019 13:51:19 +0000 (15:51 +0200)]
selftests: kvm: fix for compilers that do not support -no-pie
-no-pie was added to GCC at the same time as their configuration option
--enable-default-pie. Compilers that were built before do not have
-no-pie, but they also do not need it. Detect the option at build
time.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 11 Apr 2019 13:57:14 +0000 (15:57 +0200)]
selftests: kvm/evmcs_test: complete I/O before migrating guest state
Starting state migration after an IO exit without first completing IO
may result in test failures. We already have two tests that need this
(this patch in fact fixes evmcs_test, similar to what was fixed for
state_test in commit c03815984d31, "KVM: selftests: complete IO before
migrating guest state", 2019-03-13) and a third is coming. So, move the
code to vcpu_save_state, and while at it do not access register state
until after I/O is complete.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: x86: Always use 32-bit SMRAM save state for 32-bit kernels
Invoking the 64-bit variation on a 32-bit kenrel will crash the guest,
trigger a WARN, and/or lead to a buffer overrun in the host, e.g.
rsm_load_state_64() writes r8-r15 unconditionally, but enum kvm_reg and
thus x86_emulate_ctxt._regs only define r8-r15 for CONFIG_X86_64.
KVM allows userspace to report long mode support via CPUID, even though
the guest is all but guaranteed to crash if it actually tries to enable
long mode. But, a pure 32-bit guest that is ignorant of long mode will
happily plod along.
SMM complicates things as 64-bit CPUs use a different SMRAM save state
area. KVM handles this correctly for 64-bit kernels, e.g. uses the
legacy save state map if userspace has hid long mode from the guest,
but doesn't fare well when userspace reports long mode support on a
32-bit host kernel (32-bit KVM doesn't support 64-bit guests).
Since the alternative is to crash the guest, e.g. by not loading state
or explicitly requesting shutdown, unconditionally use the legacy SMRAM
save state map for 32-bit KVM. If a guest has managed to get far enough
to handle SMIs when running under a weird/buggy userspace hypervisor,
then don't deliberately crash the guest since there are no downsides
(from KVM's perspective) to allow it to continue running.
Fixes: 2b1d512e33b97 ("KVM: x86: save/load state on SMM switch") Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: x86: Don't clear EFER during SMM transitions for 32-bit vCPU
Neither AMD nor Intel CPUs have an EFER field in the legacy SMRAM save
state area, i.e. don't save/restore EFER across SMM transitions. KVM
somewhat models this, e.g. doesn't clear EFER on entry to SMM if the
guest doesn't support long mode. But during RSM, KVM unconditionally
clears EFER so that it can get back to pure 32-bit mode in order to
start loading CRs with their actual non-SMM values.
Clear EFER only when it will be written when loading the non-SMM state
so as to preserve bits that can theoretically be set on 32-bit vCPUs,
e.g. KVM always emulates EFER_SCE.
And because CR4.PAE is cleared only to play nice with EFER, wrap that
code in the long mode check as well. Note, this may result in a
compiler warning about cr4 being consumed uninitialized. Re-read CR4
even though it's technically unnecessary, as doing so allows for more
readable code and RSM emulation is not a performance critical path.
Fixes: 2b1d512e33b97 ("KVM: x86: save/load state on SMM switch") Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: x86: clear SMM flags before loading state while leaving SMM
RSM emulation is currently broken on VMX when the interrupted guest has
CR4.VMXE=1. Stop dancing around the issue of HF_SMM_MASK being set when
loading SMSTATE into architectural state, e.g. by toggling it for
problematic flows, and simply clear HF_SMM_MASK prior to loading
architectural state (from SMRAM save state area).
Reported-by: Jon Doron <arilou@gmail.com> Cc: Jim Mattson <jmattson@google.com> Cc: Liran Alon <liran.alon@oracle.com> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Fixes: 6dc7ba0a3e2e ("KVM: VMX: check nested state and CR4.VMXE against SMM") Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Prepare for clearing HF_SMM_MASK prior to loading state from the SMRAM
save state map, i.e. kvm_smm_changed() needs to be called after state
has been loaded and so cannot be done automatically when setting
hflags from RSM.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: x86: Load SMRAM in a single shot when leaving SMM
RSM emulation is currently broken on VMX when the interrupted guest has
CR4.VMXE=1. Rather than dance around the issue of HF_SMM_MASK being set
when loading SMSTATE into architectural state, ideally RSM emulation
itself would be reworked to clear HF_SMM_MASK prior to loading non-SMM
architectural state.
Ostensibly, the only motivation for having HF_SMM_MASK set throughout
the loading of state from the SMRAM save state area is so that the
memory accesses from GET_SMSTATE() are tagged with role.smm. Load
all of the SMRAM save state area from guest memory at the beginning of
RSM emulation, and load state from the buffer instead of reading guest
memory one-by-one.
This paves the way for clearing HF_SMM_MASK prior to loading state,
and also aligns RSM with the enter_smm() behavior, which fills a
buffer and writes SMRAM save state in a single go.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Liran Alon [Mon, 25 Mar 2019 19:09:17 +0000 (21:09 +0200)]
KVM: nVMX: Expose RDPMC-exiting only when guest supports PMU
Issue was discovered when running kvm-unit-tests on KVM running as L1 on
top of Hyper-V.
When vmx_instruction_intercept unit-test attempts to run RDPMC to test
RDPMC-exiting, it is intercepted by L1 KVM which it's EXIT_REASON_RDPMC
handler raise #GP because vCPU exposed by Hyper-V doesn't support PMU.
Instead of unit-test expectation to be reflected with EXIT_REASON_RDPMC.
The reason vmx_instruction_intercept unit-test attempts to run RDPMC
even though Hyper-V doesn't support PMU is because L1 expose to L2
support for RDPMC-exiting. Which is reasonable to assume that is
supported only in case CPU supports PMU to being with.
Above issue can easily be simulated by modifying
vmx_instruction_intercept config in x86/unittests.cfg to run QEMU with
"-cpu host,+vmx,-pmu" and run unit-test.
To handle issue, change KVM to expose RDPMC-exiting only when guest
supports PMU.
Reported-by: Saar Amar <saaramar@microsoft.com> Reviewed-by: Mihai Carabas <mihai.carabas@oracle.com> Reviewed-by: Jim Mattson <jmattson@google.com> Signed-off-by: Liran Alon <liran.alon@oracle.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Liran Alon [Mon, 25 Mar 2019 19:10:17 +0000 (21:10 +0200)]
KVM: x86: Raise #GP when guest vCPU do not support PMU
Before this change, reading a VMware pseduo PMC will succeed even when
PMU is not supported by guest. This can easily be seen by running
kvm-unit-test vmware_backdoors with "-cpu host,-pmu" option.
Reviewed-by: Mihai Carabas <mihai.carabas@oracle.com> Signed-off-by: Liran Alon <liran.alon@oracle.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
In this case, host_xcr0 is 0x2ff, guest vcpu xcr0 is 0xff. After schedule
out, host cpu has guest xcr0 loaded (0xff).
In __switch_to {
switch_fpu_finish
copy_kernel_to_fpregs
XRSTORS
If any bit i in XSTATE_BV[i] == 1 and xcr0[i] == 0, XRSTORS will
generate #GP (In this case, bit 9). Then ex_handler_fprestore kicks in
and tries to reinitialize fpu by restoring init fpu state. Same story as
last #GP, except we get DOUBLE FAULT this time.
Cc: stable@vger.kernel.org Signed-off-by: WANG Chao <chao.wang@ucloud.cn> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: x86: svm: make sure NMI is injected after nmi_singlestep
I noticed that apic test from kvm-unit-tests always hangs on my EPYC 7401P,
the hanging test nmi-after-sti is trying to deliver 30000 NMIs and tracing
shows that we're sometimes able to deliver a few but never all.
When we're trying to inject an NMI we may fail to do so immediately for
various reasons, however, we still need to inject it so enable_nmi_window()
arms nmi_singlestep mode. #DB occurs as expected, but we're not checking
for pending NMIs before entering the guest and unless there's a different
event to process, the NMI will never get delivered.
Make KVM_REQ_EVENT request on the vCPU from db_interception() to make sure
pending NMIs are checked and possibly injected.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Only clear the valid bit when invalidate logical APIC id entry.
The current logic clear the valid bit, but also set the rest of
the bits (including reserved bits) to 1.
Fixes: 6a283700cb06 ('svm: Fix AVIC DFR and LDR handling') Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
that the change coud potentially cause an extra IPI to be sent to
the destination vcpu because the AVIC hardware already set the IRR bit
before the incomplete IPI #VMEXIT with id=1 (target vcpu is not running).
Since writting to ICR and ICR2 will also set the IRR. If something triggers
the destination vcpu to get scheduled before the emulation finishes, then
this could result in an additional IPI.
Also, the issue mentioned in the commit 1e20ef4a9b4b was misdiagnosed.
Ben Gardon [Mon, 8 Apr 2019 18:07:30 +0000 (11:07 -0700)]
kvm: mmu: Fix overflow on kvm mmu page limit calculation
KVM bases its memory usage limits on the total number of guest pages
across all memslots. However, those limits, and the calculations to
produce them, use 32 bit unsigned integers. This can result in overflow
if a VM has more guest pages that can be represented by a u32. As a
result of this overflow, KVM can use a low limit on the number of MMU
pages it will allocate. This makes KVM unable to map all of guest memory
at once, prompting spurious faults.
Tested: Ran all kvm-unit-tests on an Intel Haswell machine. This patch
introduced no new failures.
Signed-off-by: Ben Gardon <bgardon@google.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 15 Apr 2019 13:57:19 +0000 (15:57 +0200)]
KVM: nVMX: always use early vmcs check when EPT is disabled
The remaining failures of vmx.flat when EPT is disabled are caused by
incorrectly reflecting VMfails to the L1 hypervisor. What happens is
that nested_vmx_restore_host_state corrupts the guest CR3, reloading it
with the host's shadow CR3 instead, because it blindly loads GUEST_CR3
from the vmcs01.
For simplicity let's just always use hardware VMCS checks when EPT is
disabled. This way, nested_vmx_restore_host_state is not reached at
all (or at least shouldn't be reached).
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 15 Apr 2019 13:16:17 +0000 (15:16 +0200)]
KVM: nVMX: allow tests to use bad virtual-APIC page address
As mentioned in the comment, there are some special cases where we can simply
clear the TPR shadow bit from the CPU-based execution controls in the vmcs02.
Handle them so that we can remove some XFAILs from vmx.flat.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Merge tag 'libnvdimm-fixes-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams:
"I debated holding this back for the v5.2 merge window due to the size
of the "zero-key" changes, but affected users would benefit from
having the fixes sooner. It did not make sense to change the zero-key
semantic in isolation for the "secure-erase" command, but instead
include it for all security commands.
The short background on the need for these changes is that some NVDIMM
platforms enable security with a default zero-key rather than let the
OS specify the initial key. This makes the security enabling that
landed in v5.0 unusable for some users.
Summary:
- Compatibility fix for nvdimm-security implementations with a
default zero-key.
- Miscellaneous small fixes for out-of-bound accesses, cleanup after
initialization failures, and missing debug messages"
* tag 'libnvdimm-fixes-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
tools/testing/nvdimm: Retain security state after overwrite
libnvdimm/pmem: fix a possible OOB access when read and write pmem
libnvdimm/security, acpi/nfit: unify zero-key for all security commands
libnvdimm/security: provide fix for secure-erase to use zero-key
libnvdimm/btt: Fix a kmemdup failure check
libnvdimm/namespace: Fix a potential NULL pointer dereference
acpi/nfit: Always dump _DSM output payload
Merge tag 'fsdax-fix-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull fsdax fix from Dan Williams:
"A single filesystem-dax fix. It has been lingering in -next for a long
while and there are no other fsdax fixes on the horizon:
- Avoid a crash scenario with architectures like powerpc that require
'pgtable_deposit' for the zero page"
* tag 'fsdax-fix-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
fs/dax: Deposit pagetable even when installing zero page
Jonathan Lemon [Sun, 14 Apr 2019 21:21:29 +0000 (14:21 -0700)]
route: Avoid crash from dereferencing NULL rt->from
When __ip6_rt_update_pmtu() is called, rt->from is RCU dereferenced, but is
never checked for null - rt6_flush_exceptions() may have removed the entry.
Fixes: ec7b3e64852f ("net/ipv6: Make from in rt6_info rcu protected") Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Reviewed-by: David Ahern <dsahern@gmail.com> Reviewed-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
MAINTAINERS contains a lower-case and upper-case variant of
Woojung Huh' s email address.
Only keep the lower-case variant in MAINTAINERS.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Acked-by: Woojung Huh <woojung.huh@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
When a bond is enslaved to another bond, bond_netdev_event() only
handles the event as if the bond is a master, and skips treating the
bond as a slave.
This leads to a refcount leak on the slave, since we don't remove the
adjacency to its master and the master holds a reference on the slave.
Reproducer:
ip link add bondL type bond
ip link add bondU type bond
ip link set bondL master bondU
ip link del bondL
No "Fixes:" tag, this code is older than git history.
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: David S. Miller <davem@davemloft.net>
The reverted bugfix will cause another issue.
Reported by syzbot+6024817a931b2830bc93@syzkaller.appspotmail.com.
See https://syzkaller.appspot.com/x/log.txt?x=1737671b200000 for
details.
Signed-off-by: Wang Hai <wanghai26@huawei.com> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
KVM: x86/mmu: Fix an inverted list_empty() check when zapping sptes
A recently introduced helper for handling zap vs. remote flush
incorrectly bails early, effectively leaking defunct shadow pages.
Manifests as a slab BUG when exiting KVM due to the shadow pages
being alive when their associated cache is destroyed.
==========================================================================
BUG kvm_mmu_page_header: Objects remaining in kvm_mmu_page_header on ...
--------------------------------------------------------------------------
Disabling lock debugging due to kernel taint
INFO: Slab 0x00000000fc436387 objects=26 used=23 fp=0x00000000d023caee ...
CPU: 6 PID: 4315 Comm: rmmod Tainted: G B 5.1.0-rc2+ #19
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
Call Trace:
dump_stack+0x46/0x5b
slab_err+0xad/0xd0
? on_each_cpu_mask+0x3c/0x50
? ksm_migrate_page+0x60/0x60
? on_each_cpu_cond_mask+0x7c/0xa0
? __kmalloc+0x1ca/0x1e0
__kmem_cache_shutdown+0x13a/0x310
shutdown_cache+0xf/0x130
kmem_cache_destroy+0x1d5/0x200
kvm_mmu_module_exit+0xa/0x30 [kvm]
kvm_arch_exit+0x45/0x60 [kvm]
kvm_exit+0x6f/0x80 [kvm]
vmx_exit+0x1a/0x50 [kvm_intel]
__x64_sys_delete_module+0x153/0x1f0
? exit_to_usermode_loop+0x88/0xc0
do_syscall_64+0x4f/0x100
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Fixes: b155023405d8b ("KVM: x86/mmu: Split remote_flush+zap case out of kvm_mmu_flush_or_zap()") Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sven Auhagen reported that a 2nd ping request will fail if 'fully-random'
mode is used.
Reason is that if no proto information is given, min/max are both 0,
so we set the icmp id to 0 instead of chosing a random value between
0 and 65535.
Update test case as well to catch this, without fix this yields:
[..]
ERROR: cannot ping ns1 from ns2 with ip masquerade fully-random (attempt 2)
ERROR: cannot ping ns1 from ns2 with ipv6 masquerade fully-random (attempt 2)
... becaus 2nd ping clashes with existing 'id 0' icmp conntrack and gets
dropped.
Fixes: a1d410ee1275dcf ("netfilter: nat: remove l4proto->unique_tuple") Reported-by: Sven Auhagen <sven.auhagen@voleatech.de> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Dan Carpenter [Sat, 6 Apr 2019 05:26:52 +0000 (08:26 +0300)]
netfilter: nf_tables: prevent shift wrap in nft_chain_parse_hook()
I believe that "hook->num" can be up to UINT_MAX. Shifting more than
31 bits would is undefined in C but in practice it would lead to shift
wrapping. That would lead to an array overflow in nf_tables_addchain():
ops->hook = hook.type->hooks[ops->hooknum];
Fixes: 38cbd526debe ("netfilter: nf_tables: remove nhooks field from struct nft_af_info") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
netfilter: ctnetlink: don't use conntrack/expect object addresses as id
else, we leak the addresses to userspace via ctnetlink events
and dumps.
Compute an ID on demand based on the immutable parts of nf_conn struct.
Another advantage compared to using an address is that there is no
immediate re-use of the same ID in case the conntrack entry is freed and
reallocated again immediately.
Jann Horn reported that he can overflow the page ref count with
sufficient memory (and a filesystem that is intentionally extremely
slow).
Admittedly it's not exactly easy. To have more than four billion
references to a page requires a minimum of 32GB of kernel memory just
for the pointers to the pages, much less any metadata to keep track of
those pointers. Jann needed a total of 140GB of memory and a specially
crafted filesystem that leaves all reads pending (in order to not ever
free the page references and just keep adding more).
Still, we have a fairly straightforward way to limit the two obvious
user-controllable sources of page references: direct-IO like page
references gotten through get_user_pages(), and the splice pipe page
duplication. So let's just do that.
* branch page-refs:
fs: prevent page refcount overflow in pipe_buf_get
mm: prevent get_user_pages() from overflowing page refcount
mm: add 'try_get_page()' helper function
mm: make page ref count overflow check tighter and more explicit
I've cc'ed some of the checksum fixes to Eric Dumazet and i would like to get
his feedback before you pull.
For -stable v4.19
('net/mlx5: FPGA, tls, idr remove on flow delete')
('net/mlx5: FPGA, tls, hold rcu read lock a bit longer')
For -stable v4.20
('net/mlx5e: Rx, Check ip headers sanity')
('Revert "net/mlx5e: Enable reporting checksum unnecessary also for L3 packets"')
('net/mlx5e: Rx, Fixup skb checksum for packets with tail padding')
For -stable v5.0
('net/mlx5e: Switch to Toeplitz RSS hash by default')
('net/mlx5e: Protect against non-uplink representor for encap')
('net/mlx5e: XDP, Avoid checksum complete when XDP prog is loaded')
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Fixes: 32aac1be4ff6 ("rtnetlink: stats: validate attributes in get as well as dumps") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Cc: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 14 Apr 2019 20:59:49 +0000 (13:59 -0700)]
Merge branch 'qed-doorbell-overflow-recovery'
Denis Bolotin says:
====================
qed: Fix the Doorbell Overflow Recovery mechanism
This patch series fixes and improves the doorbell recovery mechanism.
The main goals of this series are to fix missing attentions from the
doorbells block (DORQ) or not handling them properly, and execute the
recovery from periodic handler instead of the attention handler.
Please consider applying the series to net.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Separate the overflow handling from the hardware interrupt status analysis.
The interrupt status is a single register and is common for all PFs. The
first PF reading the register is not necessarily the one who overflowed.
All PFs must check their overflow status on every attention.
In this change we clear the sticky indication in the attention handler to
allow doorbells to be processed again as soon as possible, but running
the doorbell recovery is scheduled for the periodic handler to reduce the
time spent in the attention handler.
Checking the need for DORQ flush was changed to "db_bar_no_edpm" because
qed_edpm_enabled()'s result could change dynamically and might have
prevented a needed flush.
Signed-off-by: Denis Bolotin <dbolotin@marvell.com> Signed-off-by: Michal Kalderon <mkalderon@marvell.com> Signed-off-by: Ariel Elior <aelior@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
When the DORQ (doorbell block) is overflowed, all PFs get attentions at the
same time. If one PF finished handling the attention before another PF even
started, the second PF might miss the DORQ's attention bit and not handle
the attention at all.
If the DORQ attention is missed and the issue is not resolved, another
attention will not be sent, therefore each attention is treated as a
potential DORQ attention.
As a result, the attention callback is called more frequently so the debug
print was moved to reduce its quantity.
The number of periodic doorbell recovery handler schedules was reduced
because it was the previous way to mitigating the missed attention issue.
Signed-off-by: Denis Bolotin <dbolotin@marvell.com> Signed-off-by: Michal Kalderon <mkalderon@marvell.com> Signed-off-by: Ariel Elior <aelior@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Fix the condition which verifies that doorbell address is inside the
doorbell bar by checking that the end of the address is within range
as well.
Signed-off-by: Denis Bolotin <dbolotin@marvell.com> Signed-off-by: Michal Kalderon <mkalderon@marvell.com> Signed-off-by: Ariel Elior <aelior@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
DB_REC_DRY_RUN (running doorbell recovery without sending doorbells) is
never used. DB_REC_ONCE (send a single doorbell from the doorbell recovery)
is not needed anymore because by running the periodic handler we make sure
we check the overflow status later instead.
This patch is needed because in the next patches, the only doorbell
recovery type being used is DB_REC_REAL_DEAL, and the fixes are much
cleaner without this enum.
Signed-off-by: Denis Bolotin <dbolotin@marvell.com> Signed-off-by: Michal Kalderon <mkalderon@marvell.com> Signed-off-by: Ariel Elior <aelior@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Fixes: 3dbd19f3ed38 ("ipv4: recompile ip options in ipv4_link_failure") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Cc: Stephen Suryaputra <ssuryaextr@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Matthew Wilcox [Fri, 5 Apr 2019 21:02:10 +0000 (14:02 -0700)]
fs: prevent page refcount overflow in pipe_buf_get
Change pipe_buf_get() to return a bool indicating whether it succeeded
in raising the refcount of the page (if the thing in the pipe is a page).
This removes another mechanism for overflowing the page refcount. All
callers converted to handle a failure.
mm: prevent get_user_pages() from overflowing page refcount
If the page refcount wraps around past zero, it will be freed while
there are still four billion references to it. One of the possible
avenues for an attacker to try to make this happen is by doing direct IO
on a page multiple times. This patch makes get_user_pages() refuse to
take a new page reference if there are already more than two billion
references to the page.
This is the same as the traditional 'get_page()' function, but instead
of unconditionally incrementing the reference count of the page, it only
does so if the count was "safe". It returns whether the reference count
was incremented (and is marked __must_check, since the caller obviously
has to be aware of it).
Also like 'get_page()', you can't use this function unless you already
had a reference to the page. The intent is that you can use this
exactly like get_page(), but in situations where you want to limit the
maximum reference count.
The code currently does an unconditional WARN_ON_ONCE() if we ever hit
the reference count issues (either zero or negative), as a notification
that the conditional non-increment actually happened.
NOTE! The count access for the "safety" check is inherently racy, but
that doesn't matter since the buffer we use is basically half the range
of the reference count (ie we look at the sign of the count).
mm: make page ref count overflow check tighter and more explicit
We have a VM_BUG_ON() to check that the page reference count doesn't
underflow (or get close to overflow) by checking the sign of the count.
That's all fine, but we actually want to allow people to use a "get page
ref unless it's already very high" helper function, and we want that one
to use the sign of the page ref (without triggering this VM_BUG_ON).
Change the VM_BUG_ON to only check for small underflows (or _very_ close
to overflowing), and ignore overflows which have strayed into negative
territory.
projects / kernel.git / log