| Age | Commit message (Collapse) | Author | Files | Lines |
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Bounds check hw_head index provided by NIC to verify it lies
within the TX buffer ring.
Reported-by: Aashay Shringarpure <aashay@google.com>
Reported-by: Yi Chou <yich@google.com>
Reported-by: Shervin Oloumi <enlightened@google.com>
Signed-off-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Enforce that the CPU can not get stuck in an infinite loop.
Reported-by: Aashay Shringarpure <aashay@google.com>
Reported-by: Yi Chou <yich@google.com>
Reported-by: Shervin Oloumi <enlightened@google.com>
Signed-off-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Don't defer handling the err case outside the loop. That's pointless.
And since is_rsc_complete is only used inside this loop, declare
it inside the loop to reduce it's scope.
Signed-off-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In aq_ring_rx_clean(), if buff->is_eop is not set AND
buff->len < AQ_CFG_RX_HDR_SIZE, then hdr_len remains equal to
buff->len and skb_add_rx_frag(xxx, *0*, ...) is not called.
The loop following this code starts calling skb_add_rx_frag() starting
with i=1 and thus frag[0] is never initialized. Since i is initialized
to zero at the top of the primary loop, we can just reference and
post-increment i instead of hardcoding the 0 when calling
skb_add_rx_frag() the first time.
Reported-by: Aashay Shringarpure <aashay@google.com>
Reported-by: Yi Chou <yich@google.com>
Reported-by: Shervin Oloumi <enlightened@google.com>
Signed-off-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Switch to using pcim_enable_device() to avoid missing pci_disable_device().
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220510031316.1780409-1-yangyingliang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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In lanphy_read_page_reg, calling __phy_read() might return a negative
error code. Use 'int' to check the error code.
Fixes: 7c2dcfa295b1 ("net: phy: micrel: Add support for LAN8804 PHY")
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220509144519.2343399-1-wanjiabing@vivo.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The impact of this regression is the same for resume that I saw on
thaw: the kernel hangs and nothing except SysRq rebooting can be done.
Fixes regression in commit cbe6c3a8f8f4 ("net: atlantic: invert deep
par in pm functions, preventing null derefs"), where I disabled deep
pm resets in suspend and resume, trying to make sense of the
atl_resume_common() deep parameter in the first place.
It turns out, that atlantic always has to deep reset on pm
operations. Even though I expected that and tested resume, I screwed
up by kexec-rebooting into an unpatched kernel, thus missing the
breakage.
This fixup obsoletes the deep parameter of atl_resume_common, but I
leave the cleanup for the maintainers to post to mainline.
Suspend and hibernation were successfully tested by the reporters.
Fixes: cbe6c3a8f8f4 ("net: atlantic: invert deep par in pm functions, preventing null derefs")
Link: https://lore.kernel.org/regressions/9-Ehc_xXSwdXcvZqKD5aSqsqeNj5Izco4MYEwnx5cySXVEc9-x_WC4C3kAoCqNTi-H38frroUK17iobNVnkLtW36V6VWGSQEOHXhmVMm5iQ=@protonmail.com/
Reported-by: Jordan Leppert <jordanleppert@protonmail.com>
Reported-by: Holger Hoffstaette <holger@applied-asynchrony.com>
Tested-by: Jordan Leppert <jordanleppert@protonmail.com>
Tested-by: Holger Hoffstaette <holger@applied-asynchrony.com>
CC: <stable@vger.kernel.org> # 5.10+
Signed-off-by: Manuel Ullmann <labre@posteo.de>
Link: https://lore.kernel.org/r/87bkw8dfmp.fsf@posteo.de
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue
Tony Nguyen says:
====================
Intel Wired LAN Driver Updates 2022-05-06
This series contains updates to ice driver only.
Ivan Vecera fixes a race with aux plug/unplug by delaying setting adev
until initialization is complete and adding locking.
Anatolii ensures VF queues are completely disabled before attempting to
reconfigure them.
Michal ensures stale Tx timestamps are cleared from hardware.
* '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue:
ice: fix PTP stale Tx timestamps cleanup
ice: clear stale Tx queue settings before configuring
ice: Fix race during aux device (un)plugging
====================
Link: https://lore.kernel.org/r/20220506174129.4976-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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This fixes the following error caused by a race condition between
phydev->adjust_link() and a MDIO transaction in the phy interrupt
handler. The issue was reproduced with the ethernet FEC driver and a
micrel KSZ9031 phy.
[ 146.195696] fec 2188000.ethernet eth0: MDIO read timeout
[ 146.201779] ------------[ cut here ]------------
[ 146.206671] WARNING: CPU: 0 PID: 571 at drivers/net/phy/phy.c:942 phy_error+0x24/0x6c
[ 146.214744] Modules linked in: bnep imx_vdoa imx_sdma evbug
[ 146.220640] CPU: 0 PID: 571 Comm: irq/128-2188000 Not tainted 5.18.0-rc3-00080-gd569e86915b7 #9
[ 146.229563] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 146.236257] unwind_backtrace from show_stack+0x10/0x14
[ 146.241640] show_stack from dump_stack_lvl+0x58/0x70
[ 146.246841] dump_stack_lvl from __warn+0xb4/0x24c
[ 146.251772] __warn from warn_slowpath_fmt+0x5c/0xd4
[ 146.256873] warn_slowpath_fmt from phy_error+0x24/0x6c
[ 146.262249] phy_error from kszphy_handle_interrupt+0x40/0x48
[ 146.268159] kszphy_handle_interrupt from irq_thread_fn+0x1c/0x78
[ 146.274417] irq_thread_fn from irq_thread+0xf0/0x1dc
[ 146.279605] irq_thread from kthread+0xe4/0x104
[ 146.284267] kthread from ret_from_fork+0x14/0x28
[ 146.289164] Exception stack(0xe6fa1fb0 to 0xe6fa1ff8)
[ 146.294448] 1fa0: 00000000 00000000 00000000 00000000
[ 146.302842] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 146.311281] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 146.318262] irq event stamp: 12325
[ 146.321780] hardirqs last enabled at (12333): [<c01984c4>] __up_console_sem+0x50/0x60
[ 146.330013] hardirqs last disabled at (12342): [<c01984b0>] __up_console_sem+0x3c/0x60
[ 146.338259] softirqs last enabled at (12324): [<c01017f0>] __do_softirq+0x2c0/0x624
[ 146.346311] softirqs last disabled at (12319): [<c01300ac>] __irq_exit_rcu+0x138/0x178
[ 146.354447] ---[ end trace 0000000000000000 ]---
With the FEC driver phydev->adjust_link() calls fec_enet_adjust_link()
calls fec_stop()/fec_restart() and both these function reset and
temporary disable the FEC disrupting any MII transaction that
could be happening at the same time.
fec_enet_adjust_link() and phy_read() can be running at the same time
when we have one additional interrupt before the phy_state_machine() is
able to terminate.
Thread 1 (phylib WQ) | Thread 2 (phy interrupt)
|
| phy_interrupt() <-- PHY IRQ
| handle_interrupt()
| phy_read()
| phy_trigger_machine()
| --> schedule phylib WQ
|
|
phy_state_machine() |
phy_check_link_status() |
phy_link_change() |
phydev->adjust_link() |
fec_enet_adjust_link() |
--> FEC reset | phy_interrupt() <-- PHY IRQ
| phy_read()
|
Fix this by acquiring the phydev lock in phy_interrupt().
Link: https://lore.kernel.org/all/20220422152612.GA510015@francesco-nb.int.toradex.com/
Fixes: c974bdbc3e77 ("net: phy: Use threaded IRQ, to allow IRQ from sleeping devices")
cc: <stable@vger.kernel.org>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220506060815.327382-1-francesco.dolcini@toradex.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Fix the missing pci_disable_device() before return
from tulip_init_one() in the error handling case.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220506094250.3630615-1-yangyingliang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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If ionic_map_bars() fails, pci_release_regions() need be called.
Fixes: fbfb8031533c ("ionic: Add hardware init and device commands")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220506034040.2614129-1-yangyingliang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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It fixes memory leak in ring buffer change logic.
When ring buffer size is changed(ethtool -G eth0 rx 4096), sfc driver
works like below.
1. stop all channels and remove ring buffers.
2. allocates new buffer array.
3. allocates rx buffers.
4. start channels.
While the above steps are working, it skips some steps if the channel
doesn't have a ->copy callback function.
Due to ptp channel doesn't have ->copy callback, these above steps are
skipped for ptp channel.
It eventually makes some problems.
a. ptp channel's ring buffer size is not changed, it works only
1024(default).
b. memory leak.
The reason for memory leak is to use the wrong ring buffer values.
There are some values, which is related to ring buffer size.
a. efx->rxq_entries
- This is global value of rx queue size.
b. rx_queue->ptr_mask
- used for access ring buffer as circular ring.
- roundup_pow_of_two(efx->rxq_entries) - 1
c. rx_queue->max_fill
- efx->rxq_entries - EFX_RXD_HEAD_ROOM
These all values should be based on ring buffer size consistently.
But ptp channel's values are not.
a. efx->rxq_entries
- This is global(for sfc) value, always new ring buffer size.
b. rx_queue->ptr_mask
- This is always 1023(default).
c. rx_queue->max_fill
- This is new ring buffer size - EFX_RXD_HEAD_ROOM.
Let's assume we set 4096 for rx ring buffer,
normal channel ptp channel
efx->rxq_entries 4096 4096
rx_queue->ptr_mask 4095 1023
rx_queue->max_fill 4086 4086
sfc driver allocates rx ring buffers based on these values.
When it allocates ptp channel's ring buffer, 4086 ring buffers are
allocated then, these buffers are attached to the allocated array.
But ptp channel's ring buffer array size is still 1024(default)
and ptr_mask is still 1023 too.
So, 3062 ring buffers will be overwritten to the array.
This is the reason for memory leak.
Test commands:
ethtool -G <interface name> rx 4096
while :
do
ip link set <interface name> up
ip link set <interface name> down
done
In order to avoid this problem, it adds ->copy callback to ptp channel
type.
So that rx_queue->ptr_mask value will be updated correctly.
Fixes: 7c236c43b838 ("sfc: Add support for IEEE-1588 PTP")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Using min_t(int, ...) as a potential array index implies to the compiler
that negative offsets should be allowed. This is not the case, though.
Replace "int" with "unsigned int". Fixes the following warning exposed
under future CONFIG_FORTIFY_SOURCE improvements:
In file included from include/linux/string.h:253,
from include/linux/bitmap.h:11,
from include/linux/cpumask.h:12,
from include/linux/smp.h:13,
from include/linux/lockdep.h:14,
from include/linux/rcupdate.h:29,
from include/linux/rculist.h:11,
from include/linux/pid.h:5,
from include/linux/sched.h:14,
from include/linux/delay.h:23,
from drivers/net/ethernet/chelsio/cxgb4/t4_hw.c:35:
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c: In function 't4_get_raw_vpd_params':
include/linux/fortify-string.h:46:33: warning: '__builtin_memcpy' pointer overflow between offset 29 and size [2147483648, 4294967295] [-Warray-bounds]
46 | #define __underlying_memcpy __builtin_memcpy
| ^
include/linux/fortify-string.h:388:9: note: in expansion of macro '__underlying_memcpy'
388 | __underlying_##op(p, q, __fortify_size); \
| ^~~~~~~~~~~~~
include/linux/fortify-string.h:433:26: note: in expansion of macro '__fortify_memcpy_chk'
433 | #define memcpy(p, q, s) __fortify_memcpy_chk(p, q, s, \
| ^~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c:2796:9: note: in expansion of macro 'memcpy'
2796 | memcpy(p->id, vpd + id, min_t(int, id_len, ID_LEN));
| ^~~~~~
include/linux/fortify-string.h:46:33: warning: '__builtin_memcpy' pointer overflow between offset 0 and size [2147483648, 4294967295] [-Warray-bounds]
46 | #define __underlying_memcpy __builtin_memcpy
| ^
include/linux/fortify-string.h:388:9: note: in expansion of macro '__underlying_memcpy'
388 | __underlying_##op(p, q, __fortify_size); \
| ^~~~~~~~~~~~~
include/linux/fortify-string.h:433:26: note: in expansion of macro '__fortify_memcpy_chk'
433 | #define memcpy(p, q, s) __fortify_memcpy_chk(p, q, s, \
| ^~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c:2798:9: note: in expansion of macro 'memcpy'
2798 | memcpy(p->sn, vpd + sn, min_t(int, sn_len, SERNUM_LEN));
| ^~~~~~
Additionally remove needless cast from u8[] to char * in last strim()
call.
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/lkml/202205031926.FVP7epJM-lkp@intel.com
Fixes: fc9279298e3a ("cxgb4: Search VPD with pci_vpd_find_ro_info_keyword()")
Fixes: 24c521f81c30 ("cxgb4: Use pci_vpd_find_id_string() to find VPD ID string")
Cc: Raju Rangoju <rajur@chelsio.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220505233101.1224230-1-keescook@chromium.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Read stale PTP Tx timestamps from PHY on cleanup.
After running out of Tx timestamps request handlers, hardware (HW) stops
reporting finished requests. Function ice_ptp_tx_tstamp_cleanup() used
to only clean up stale handlers in driver and was leaving the hardware
registers not read. Not reading stale PTP Tx timestamps prevents next
interrupts from arriving and makes timestamping unusable.
Fixes: ea9b847cda64 ("ice: enable transmit timestamps for E810 devices")
Signed-off-by: Michal Michalik <michal.michalik@intel.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Tested-by: Gurucharan <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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The iAVF driver uses 3 virtchnl op codes to communicate with the PF
regarding the VF Tx queues:
* VIRTCHNL_OP_CONFIG_VSI_QUEUES configures the hardware and firmware
logic for the Tx queues
* VIRTCHNL_OP_ENABLE_QUEUES configures the queue interrupts
* VIRTCHNL_OP_DISABLE_QUEUES disables the queue interrupts and Tx rings.
There is a bug in the iAVF driver due to the race condition between VF
reset request and shutdown being executed in parallel. This leads to a
break in logic and VIRTCHNL_OP_DISABLE_QUEUES is not being sent.
If this occurs, the PF driver never cleans up the Tx queues. This results
in leaving behind stale Tx queue settings in the hardware and firmware.
The most obvious outcome is that upon the next
VIRTCHNL_OP_CONFIG_VSI_QUEUES, the PF will fail to program the Tx
scheduler node due to a lack of space.
We need to protect ICE driver against such situation.
To fix this, make sure we clear existing stale settings out when
handling VIRTCHNL_OP_CONFIG_VSI_QUEUES. This ensures we remove the
previous settings.
Calling ice_vf_vsi_dis_single_txq should be safe as it will do nothing if
the queue is not configured. The function already handles the case when the
Tx queue is not currently configured and exits with a 0 return in that
case.
Fixes: 7ad15440acf8 ("ice: Refactor VIRTCHNL_OP_CONFIG_VSI_QUEUES handling")
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Anatolii Gerasymenko <anatolii.gerasymenko@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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Function ice_plug_aux_dev() assigns pf->adev field too early prior
aux device initialization and on other side ice_unplug_aux_dev()
starts aux device deinit and at the end assigns NULL to pf->adev.
This is wrong because pf->adev should always be non-NULL only when
aux device is fully initialized and ready. This wrong order causes
a crash when ice_send_event_to_aux() call occurs because that function
depends on non-NULL value of pf->adev and does not assume that
aux device is half-initialized or half-destroyed.
After order correction the race window is tiny but it is still there,
as Leon mentioned and manipulation with pf->adev needs to be protected
by mutex.
Fix (un-)plugging functions so pf->adev field is set after aux device
init and prior aux device destroy and protect pf->adev assignment by
new mutex. This mutex is also held during ice_send_event_to_aux()
call to ensure that aux device is valid during that call.
Note that device lock used ice_send_event_to_aux() needs to be kept
to avoid race with aux drv unload.
Reproducer:
cycle=1
while :;do
echo "#### Cycle: $cycle"
ip link set ens7f0 mtu 9000
ip link add bond0 type bond mode 1 miimon 100
ip link set bond0 up
ifenslave bond0 ens7f0
ip link set bond0 mtu 9000
ethtool -L ens7f0 combined 1
ip link del bond0
ip link set ens7f0 mtu 1500
sleep 1
let cycle++
done
In short when the device is added/removed to/from bond the aux device
is unplugged/plugged. When MTU of the device is changed an event is
sent to aux device asynchronously. This can race with (un)plugging
operation and because pf->adev is set too early (plug) or too late
(unplug) the function ice_send_event_to_aux() can touch uninitialized
or destroyed fields. In the case of crash below pf->adev->dev.mutex.
Crash:
[ 53.372066] bond0: (slave ens7f0): making interface the new active one
[ 53.378622] bond0: (slave ens7f0): Enslaving as an active interface with an u
p link
[ 53.386294] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 53.549104] bond0: (slave ens7f1): Enslaving as a backup interface with an up
link
[ 54.118906] ice 0000:ca:00.0 ens7f0: Number of in use tx queues changed inval
idating tc mappings. Priority traffic classification disabled!
[ 54.233374] ice 0000:ca:00.1 ens7f1: Number of in use tx queues changed inval
idating tc mappings. Priority traffic classification disabled!
[ 54.248204] bond0: (slave ens7f0): Releasing backup interface
[ 54.253955] bond0: (slave ens7f1): making interface the new active one
[ 54.274875] bond0: (slave ens7f1): Releasing backup interface
[ 54.289153] bond0 (unregistering): Released all slaves
[ 55.383179] MII link monitoring set to 100 ms
[ 55.398696] bond0: (slave ens7f0): making interface the new active one
[ 55.405241] BUG: kernel NULL pointer dereference, address: 0000000000000080
[ 55.405289] bond0: (slave ens7f0): Enslaving as an active interface with an u
p link
[ 55.412198] #PF: supervisor write access in kernel mode
[ 55.412200] #PF: error_code(0x0002) - not-present page
[ 55.412201] PGD 25d2ad067 P4D 0
[ 55.412204] Oops: 0002 [#1] PREEMPT SMP NOPTI
[ 55.412207] CPU: 0 PID: 403 Comm: kworker/0:2 Kdump: loaded Tainted: G S
5.17.0-13579-g57f2d6540f03 #1
[ 55.429094] bond0: (slave ens7f1): Enslaving as a backup interface with an up
link
[ 55.430224] Hardware name: Dell Inc. PowerEdge R750/06V45N, BIOS 1.4.4 10/07/
2021
[ 55.430226] Workqueue: ice ice_service_task [ice]
[ 55.468169] RIP: 0010:mutex_unlock+0x10/0x20
[ 55.472439] Code: 0f b1 13 74 96 eb e0 4c 89 ee eb d8 e8 79 54 ff ff 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 65 48 8b 04 25 40 ef 01 00 31 d2 <f0> 48 0f b1 17 75 01 c3 e9 e3 fe ff ff 0f 1f 00 0f 1f 44 00 00 48
[ 55.491186] RSP: 0018:ff4454230d7d7e28 EFLAGS: 00010246
[ 55.496413] RAX: ff1a79b208b08000 RBX: ff1a79b2182e8880 RCX: 0000000000000001
[ 55.503545] RDX: 0000000000000000 RSI: ff4454230d7d7db0 RDI: 0000000000000080
[ 55.510678] RBP: ff1a79d1c7e48b68 R08: ff4454230d7d7db0 R09: 0000000000000041
[ 55.517812] R10: 00000000000000a5 R11: 00000000000006e6 R12: ff1a79d1c7e48bc0
[ 55.524945] R13: 0000000000000000 R14: ff1a79d0ffc305c0 R15: 0000000000000000
[ 55.532076] FS: 0000000000000000(0000) GS:ff1a79d0ffc00000(0000) knlGS:0000000000000000
[ 55.540163] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 55.545908] CR2: 0000000000000080 CR3: 00000003487ae003 CR4: 0000000000771ef0
[ 55.553041] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 55.560173] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 55.567305] PKRU: 55555554
[ 55.570018] Call Trace:
[ 55.572474] <TASK>
[ 55.574579] ice_service_task+0xaab/0xef0 [ice]
[ 55.579130] process_one_work+0x1c5/0x390
[ 55.583141] ? process_one_work+0x390/0x390
[ 55.587326] worker_thread+0x30/0x360
[ 55.590994] ? process_one_work+0x390/0x390
[ 55.595180] kthread+0xe6/0x110
[ 55.598325] ? kthread_complete_and_exit+0x20/0x20
[ 55.603116] ret_from_fork+0x1f/0x30
[ 55.606698] </TASK>
Fixes: f9f5301e7e2d ("ice: Register auxiliary device to provide RDMA")
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Reviewed-by: Dave Ertman <david.m.ertman@intel.com>
Tested-by: Gurucharan <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
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Given the following order of operations:
(1) we add filter A using tc-flower
(2) we send a packet that matches it
(3) we read the filter's statistics to find a hit count of 1
(4) we add a second filter B with a higher preference than A, and A
moves one position to the right to make room in the TCAM for it
(5) we send another packet, and this matches the second filter B
(6) we read the filter statistics again.
When this happens, the hit count of filter A is 2 and of filter B is 1,
despite a single packet having matched each filter.
Furthermore, in an alternate history, reading the filter stats a second
time between steps (3) and (4) makes the hit count of filter A remain at
1 after step (6), as expected.
The reason why this happens has to do with the filter->stats.pkts field,
which is written to hardware through the call path below:
vcap_entry_set
/ | \
/ | \
/ | \
/ | \
es0_entry_set is1_entry_set is2_entry_set
\ | /
\ | /
\ | /
vcap_data_set(data.counter, ...)
The primary role of filter->stats.pkts is to transport the filter hit
counters from the last readout all the way from vcap_entry_get() ->
ocelot_vcap_filter_stats_update() -> ocelot_cls_flower_stats().
The reason why vcap_entry_set() writes it to hardware is so that the
counters (saturating and having a limited bit width) are cleared
after each user space readout.
The writing of filter->stats.pkts to hardware during the TCAM entry
movement procedure is an unintentional consequence of the code design,
because the hit count isn't up to date at this point.
So at step (4), when filter A is moved by ocelot_vcap_filter_add() to
make room for filter B, the hardware hit count is 0 (no packet matched
on it in the meantime), but filter->stats.pkts is 1, because the last
readout saw the earlier packet. The movement procedure programs the old
hit count back to hardware, so this creates the impression to user space
that more packets have been matched than they really were.
The bug can be seen when running the gact_drop_and_ok_test() from the
tc_actions.sh selftest.
Fix the issue by reading back the hit count to tmp->stats.pkts before
migrating the VCAP filter. Sure, this is a best-effort technique, since
the packets that hit the rule between vcap_entry_get() and
vcap_entry_set() won't be counted, but at least it allows the counters
to be reliably used for selftests where the traffic is under control.
The vcap_entry_get() name is a bit unintuitive, but it only reads back
the counter portion of the TCAM entry, not the entire entry.
The index from which we retrieve the counter is also a bit unintuitive
(i - 1 during add, i + 1 during del), but this is the way in which TCAM
entry movement works. The "entry index" isn't a stored integer for a
TCAM filter, instead it is dynamically computed by
ocelot_vcap_block_get_filter_index() based on the entry's position in
the &block->rules list. That position (as well as block->count) is
automatically updated by ocelot_vcap_filter_add_to_block() on add, and
by ocelot_vcap_block_remove_filter() on del. So "i" is the new filter
index, and "i - 1" or "i + 1" respectively are the old addresses of that
TCAM entry (we only support installing/deleting one filter at a time).
Fixes: b596229448dd ("net: mscc: ocelot: Add support for tcam")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Once the CPU port was added to the destination port mask of a packet, it
can never be cleared, so even packets marked as dropped by the MASK_MODE
of a VCAP IS2 filter will still reach it. This is why we need the
OCELOT_POLICER_DISCARD to "kill dropped packets dead" and make software
stop seeing them.
We disallow policer rules from being put on any other chain than the one
for the first lookup, but we don't do this for "drop" rules, although we
should. This change is merely ascertaining that the rules dont't
(completely) work and letting the user know.
The blamed commit is the one that introduced the multi-chain architecture
in ocelot. Prior to that, we should have always offloaded the filters to
VCAP IS2 lookup 0, where they did work.
Fixes: 1397a2eb52e2 ("net: mscc: ocelot: create TCAM skeleton from tc filter chains")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
The VCAP IS2 TCAM is looked up twice per packet, and each filter can be
configured to only match during the first, second lookup, or both, or
none.
The blamed commit wrote the code for making VCAP IS2 filters match only
on the given lookup. But right below that code, there was another line
that explicitly made the lookup a "don't care", and this is overwriting
the lookup we've selected. So the code had no effect.
Some of the more noticeable effects of having filters match on both
lookups:
- in "tc -s filter show dev swp0 ingress", we see each packet matching a
VCAP IS2 filter counted twice. This throws off scripts such as
tools/testing/selftests/net/forwarding/tc_actions.sh and makes them
fail.
- a "tc-drop" action offloaded to VCAP IS2 needs a policer as well,
because once the CPU port becomes a member of the destination port
mask of a packet, nothing removes it, not even a PERMIT/DENY mask mode
with a port mask of 0. But VCAP IS2 rules with the POLICE_ENA bit in
the action vector can only appear in the first lookup. What happens
when a filter matches both lookups is that the action vector is
combined, and this makes the POLICE_ENA bit ineffective, since the
last lookup in which it has appeared is the second one. In other
words, "tc-drop" actions do not drop packets for the CPU port, dropped
packets are still seen by software unless there was an FDB entry that
directed those packets to some other place different from the CPU.
The last bit used to work, because in the initial commit b596229448dd
("net: mscc: ocelot: Add support for tcam"), we were writing the FIRST
field of the VCAP IS2 half key with a 1, not with a "don't care".
The change to "don't care" was made inadvertently by me in commit
c1c3993edb7c ("net: mscc: ocelot: generalize existing code for VCAP"),
which I just realized, and which needs a separate fix from this one,
for "stable" kernels that lack the commit blamed below.
Fixes: 226e9cd82a96 ("net: mscc: ocelot: only install TCAM entries into a specific lookup and PAG")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
deleted
ocelot_vcap_filter_del() works by moving the next filters over the
current one, and then deleting the last filter by calling vcap_entry_set()
with a del_filter which was specially created by memsetting its memory
to zeroes. vcap_entry_set() then programs this to the TCAM and action
RAM via the cache registers.
The problem is that vcap_entry_set() is a dispatch function which looks
at del_filter->block_id. But since del_filter is zeroized memory, the
block_id is 0, or otherwise said, VCAP_ES0. So practically, what we do
is delete the entry at the same TCAM index from VCAP ES0 instead of IS1
or IS2.
The code was not always like this. vcap_entry_set() used to simply be
is2_entry_set(), and then, the logic used to work.
Restore the functionality by populating the block_id of the del_filter
based on the VCAP block of the filter that we're deleting. This makes
vcap_entry_set() know what to do.
Fixes: 1397a2eb52e2 ("net: mscc: ocelot: create TCAM skeleton from tc filter chains")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Since the blamed commit, VCAP filters can appear on more than one list.
If their action is "trap", they are chained on ocelot->traps via
filter->trap_list. This is in addition to their normal placement on the
VCAP block->rules list head.
Therefore, when we free a VCAP filter, we must remove it from all lists
it is a member of, including ocelot->traps.
There are at least 2 bugs which are direct consequences of this design
decision.
First is the incorrect usage of list_empty(), meant to denote whether
"filter" is chained into ocelot->traps via filter->trap_list.
This does not do the correct thing, because list_empty() checks whether
"head->next == head", but in our case, head->next == head->prev == NULL.
So we dereference NULL pointers and die when we call list_del().
Second is the fact that not all places that should remove the filter
from ocelot->traps do so. One example is ocelot_vcap_block_remove_filter(),
which is where we have the main kfree(filter). By keeping freed filters
in ocelot->traps we end up in a use-after-free in
felix_update_trapping_destinations().
Attempting to fix all the buggy patterns is a whack-a-mole game which
makes the driver unmaintainable. Actually this is what the previous
patch version attempted to do:
https://patchwork.kernel.org/project/netdevbpf/patch/20220503115728.834457-3-vladimir.oltean@nxp.com/
but it introduced another set of bugs, because there are other places in
which create VCAP filters, not just ocelot_vcap_filter_create():
- ocelot_trap_add()
- felix_tag_8021q_vlan_add_rx()
- felix_tag_8021q_vlan_add_tx()
Relying on the convention that all those code paths must call
INIT_LIST_HEAD(&filter->trap_list) is not going to scale.
So let's do what should have been done in the first place and keep a
bool in struct ocelot_vcap_filter which denotes whether we are looking
at a trapping rule or not. Iterating now happens over the main VCAP IS2
block->rules. The advantage is that we no longer risk having stale
references to a freed filter, since it is only present in that list.
Fixes: e42bd4ed09aa ("net: mscc: ocelot: keep traps in a list")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Since commit f1131b9c23fb ("net: phy: micrel: use
kszphy_suspend()/kszphy_resume for irq aware devices") the kszphy_suspend/
resume hooks are used.
These functions require the probe function to be called so that
priv can be allocated.
Otherwise, a NULL pointer dereference happens inside
kszphy_config_reset().
Cc: stable@vger.kernel.org
Fixes: f1131b9c23fb ("net: phy: micrel: use kszphy_suspend()/kszphy_resume for irq aware devices")
Reported-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220504143104.1286960-2-festevam@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Since commit f1131b9c23fb ("net: phy: micrel: use
kszphy_suspend()/kszphy_resume for irq aware devices") the following
NULL pointer dereference is observed on a board with KSZ8061:
# udhcpc -i eth0
udhcpc: started, v1.35.0
8<--- cut here ---
Unable to handle kernel NULL pointer dereference at virtual address 00000008
pgd = f73cef4e
[00000008] *pgd=00000000
Internal error: Oops: 5 [#1] SMP ARM
Modules linked in:
CPU: 0 PID: 196 Comm: ifconfig Not tainted 5.15.37-dirty #94
Hardware name: Freescale i.MX6 SoloX (Device Tree)
PC is at kszphy_config_reset+0x10/0x114
LR is at kszphy_resume+0x24/0x64
...
The KSZ8061 phy_driver structure does not have the .probe/..driver_data
fields, which means that priv is not allocated.
This causes the NULL pointer dereference inside kszphy_config_reset().
Fix the problem by using the generic suspend/resume functions as before.
Another alternative would be to provide the .probe and .driver_data
information into the structure, but to be on the safe side, let's
just restore Ethernet functionality by using the generic suspend/resume.
Cc: stable@vger.kernel.org
Fixes: f1131b9c23fb ("net: phy: micrel: use kszphy_suspend()/kszphy_resume for irq aware devices")
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220504143104.1286960-1-festevam@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
The cited commits didn't use proper matching on inner TTC
as a result distribution of encapsulated packets wasn't symmetric
between the physical ports.
Fixes: 4c71ce50d2fe ("net/mlx5: Support partial TTC rules")
Fixes: 8e25a2bc6687 ("net/mlx5: Lag, add support to create TTC tables for LAG port selection")
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
|
|
Double clear of reset requested state can lead to NULL pointer as it
will try to delete the timer twice. This can happen for example on a
race between abort from FW and pci error or reset. Avoid such case using
test_and_clear_bit() to verify only one time reset requested state clear
flow. Similarly use test_and_set_bit() to verify only one time reset
requested state set flow.
Fixes: 7dd6df329d4c ("net/mlx5: Handle sync reset abort event")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Maher Sanalla <msanalla@nvidia.com>
Reviewed-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
|
|
The sync reset flow can lead to the following deadlock when
poll_sync_reset() is called by timer softirq and waiting on
del_timer_sync() for the same timer. Fix that by moving the part of the
flow that waits for the timer to reset_reload_work.
It fixes the following kernel Trace:
RIP: 0010:del_timer_sync+0x32/0x40
...
Call Trace:
<IRQ>
mlx5_sync_reset_clear_reset_requested+0x26/0x50 [mlx5_core]
poll_sync_reset.cold+0x36/0x52 [mlx5_core]
call_timer_fn+0x32/0x130
__run_timers.part.0+0x180/0x280
? tick_sched_handle+0x33/0x60
? tick_sched_timer+0x3d/0x80
? ktime_get+0x3e/0xa0
run_timer_softirq+0x2a/0x50
__do_softirq+0xe1/0x2d6
? hrtimer_interrupt+0x136/0x220
irq_exit+0xae/0xb0
smp_apic_timer_interrupt+0x7b/0x140
apic_timer_interrupt+0xf/0x20
</IRQ>
Fixes: 3c5193a87b0f ("net/mlx5: Use del_timer_sync in fw reset flow of halting poll")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Maher Sanalla <msanalla@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
|
|
Setting dscp2prio during the driver reload can cause dcb ieee app list to
be not empty after the reload finish and as a result to a conflict between
the priority trust state reported by the app and the state in the device
register.
Reset the dcb ieee app list on initialization in case this is
conflicting with the register status.
Fixes: 2a5e7a1344f4 ("net/mlx5e: Add dcbnl dscp to priority support")
Signed-off-by: Moshe Tal <moshet@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
|
|
During TC action parsing, the can_offload callback is called
before calling the action's main parsing callback.
Later on, the can_offload callback is called again before handling
the action's post_parse callback if exists.
Since the main parsing callback might have changed and set parsing
params for the rule, following can_offload checks might fail because
some parsing params were already set.
Specifically, the ct action main parsing sets the ct param in the
parsing status structure and when the second can_offload for ct action
is called, before handling the ct post parsing, it will return an error
since it checks this ct param to indicate multiple ct actions which are
not supported.
Therefore, the can_offload call is removed from the post parsing
handling to prevent such cases.
This is allowed since the first can_offload call will ensure that the
action can be offloaded and the fact the code reached the post parsing
handling already means that the action can be offloaded.
Fixes: 8300f225268b ("net/mlx5e: Create new flow attr for multi table actions")
Signed-off-by: Ariel Levkovich <lariel@nvidia.com>
Reviewed-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
|
|
__mlx5_tc_ct_entry_put() queues release of tuple related to some ct FT,
if that is the last reference to that tuple, the actual deletion of
the tuple can happen after the FT is already destroyed and freed.
Flush the used workqueue before destroying the ct FT.
Fixes: a2173131526d ("net/mlx5e: CT: manage the lifetime of the ct entry object")
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
|
|
When resolving the decap route device for a tunnel decap rule,
the result may be an OVS internal port device.
Prior to adding the support for internal port offload, such case
would result in using the uplink as the default decap route device
which allowed devices that can't support internal port offload
to offload this decap rule.
This behavior got broken by adding the internal port offload which
will fail in case the device can't support internal port offload.
To restore the old behavior, use the uplink device as the decap
route as before when internal port offload is not supported.
Fixes: b16eb3c81fe2 ("net/mlx5: Support internal port as decap route device")
Signed-off-by: Ariel Levkovich <lariel@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
|
|
ct_clear action is translated to clearing reg_c metadata
which holds ct state and zone information using mod header
actions.
These actions are allocated during the actions parsing, as
part of the flow attributes main mod header action list.
If ct action exists in the rule, the flow's main mod header
is used only in the post action table rule, after the ct tables
which set the ct info in the reg_c as part of the ct actions.
Therefore, if the original rule has a ct_clear action followed
by a ct action, the ct action reg_c setting will be done first and
will be followed by the ct_clear resetting reg_c and overwriting
the ct info.
Fix this by moving the ct_clear mod header actions allocation from
the ct action parsing stage to the ct action post parsing stage where
it is already known if ct_clear is followed by a ct action.
In such case, we skip the mod header actions allocation for the ct
clear since the ct action will write to reg_c anyway after clearing it.
Fixes: 806401c20a0f ("net/mlx5e: CT, Fix multiple allocations and memleak of mod acts")
Signed-off-by: Ariel Levkovich <lariel@nvidia.com>
Reviewed-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
|
|
Referenced change added check to skip updating fib when new fib instance
has same or lower priority. However, new fib instance can be an update on
same dst address as existing one even though the structure is another
instance that has different address. Ignoring events on such instances
causes multipath LAG state to not be correctly updated.
Track 'dst' and 'dst_len' fields of fib event fib_entry_notifier_info
structure and don't skip events that have the same value of that fields.
Fixes: ad11c4f1d8fd ("net/mlx5e: Lag, Only handle events from highest priority multipath entry")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
|
|
Referenced change incorrectly sets single path fib_info even when LAG is
not active. Fix it by moving call to mlx5_lag_fib_set() into conditional
that verifies LAG state.
Fixes: ad11c4f1d8fd ("net/mlx5e: Lag, Only handle events from highest priority multipath entry")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
|
|
Recent commit that modified fib route event handler to handle events
according to their priority introduced use-after-free[0] in mp->mfi pointer
usage. The pointer now is not just cached in order to be compared to
following fib_info instances, but is also dereferenced to obtain
fib_priority. However, since mlx5 lag code doesn't hold the reference to
fin_info during whole mp->mfi lifetime, it could be used after fib_info
instance has already been freed be kernel infrastructure code.
Don't ever dereference mp->mfi pointer. Refactor it to be 'const void*'
type and cache fib_info priority in dedicated integer. Group
fib_info-related data into dedicated 'fib' structure that will be further
extended by following patches in the series.
[0]:
[ 203.588029] ==================================================================
[ 203.590161] BUG: KASAN: use-after-free in mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[ 203.592386] Read of size 4 at addr ffff888144df2050 by task kworker/u20:4/138
[ 203.594766] CPU: 3 PID: 138 Comm: kworker/u20:4 Tainted: G B 5.17.0-rc7+ #6
[ 203.596751] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
[ 203.598813] Workqueue: mlx5_lag_mp mlx5_lag_fib_update [mlx5_core]
[ 203.600053] Call Trace:
[ 203.600608] <TASK>
[ 203.601110] dump_stack_lvl+0x48/0x5e
[ 203.601860] print_address_description.constprop.0+0x1f/0x160
[ 203.602950] ? mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[ 203.604073] ? mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[ 203.605177] kasan_report.cold+0x83/0xdf
[ 203.605969] ? mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[ 203.607102] mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[ 203.608199] ? mlx5_lag_init_fib_work+0x1c0/0x1c0 [mlx5_core]
[ 203.609382] ? read_word_at_a_time+0xe/0x20
[ 203.610463] ? strscpy+0xa0/0x2a0
[ 203.611463] process_one_work+0x722/0x1270
[ 203.612344] worker_thread+0x540/0x11e0
[ 203.613136] ? rescuer_thread+0xd50/0xd50
[ 203.613949] kthread+0x26e/0x300
[ 203.614627] ? kthread_complete_and_exit+0x20/0x20
[ 203.615542] ret_from_fork+0x1f/0x30
[ 203.616273] </TASK>
[ 203.617174] Allocated by task 3746:
[ 203.617874] kasan_save_stack+0x1e/0x40
[ 203.618644] __kasan_kmalloc+0x81/0xa0
[ 203.619394] fib_create_info+0xb41/0x3c50
[ 203.620213] fib_table_insert+0x190/0x1ff0
[ 203.621020] fib_magic.isra.0+0x246/0x2e0
[ 203.621803] fib_add_ifaddr+0x19f/0x670
[ 203.622563] fib_inetaddr_event+0x13f/0x270
[ 203.623377] blocking_notifier_call_chain+0xd4/0x130
[ 203.624355] __inet_insert_ifa+0x641/0xb20
[ 203.625185] inet_rtm_newaddr+0xc3d/0x16a0
[ 203.626009] rtnetlink_rcv_msg+0x309/0x880
[ 203.626826] netlink_rcv_skb+0x11d/0x340
[ 203.627626] netlink_unicast+0x4cc/0x790
[ 203.628430] netlink_sendmsg+0x762/0xc00
[ 203.629230] sock_sendmsg+0xb2/0xe0
[ 203.629955] ____sys_sendmsg+0x58a/0x770
[ 203.630756] ___sys_sendmsg+0xd8/0x160
[ 203.631523] __sys_sendmsg+0xb7/0x140
[ 203.632294] do_syscall_64+0x35/0x80
[ 203.633045] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 203.634427] Freed by task 0:
[ 203.635063] kasan_save_stack+0x1e/0x40
[ 203.635844] kasan_set_track+0x21/0x30
[ 203.636618] kasan_set_free_info+0x20/0x30
[ 203.637450] __kasan_slab_free+0xfc/0x140
[ 203.638271] kfree+0x94/0x3b0
[ 203.638903] rcu_core+0x5e4/0x1990
[ 203.639640] __do_softirq+0x1ba/0x5d3
[ 203.640828] Last potentially related work creation:
[ 203.641785] kasan_save_stack+0x1e/0x40
[ 203.642571] __kasan_record_aux_stack+0x9f/0xb0
[ 203.643478] call_rcu+0x88/0x9c0
[ 203.644178] fib_release_info+0x539/0x750
[ 203.644997] fib_table_delete+0x659/0xb80
[ 203.645809] fib_magic.isra.0+0x1a3/0x2e0
[ 203.646617] fib_del_ifaddr+0x93f/0x1300
[ 203.647415] fib_inetaddr_event+0x9f/0x270
[ 203.648251] blocking_notifier_call_chain+0xd4/0x130
[ 203.649225] __inet_del_ifa+0x474/0xc10
[ 203.650016] devinet_ioctl+0x781/0x17f0
[ 203.650788] inet_ioctl+0x1ad/0x290
[ 203.651533] sock_do_ioctl+0xce/0x1c0
[ 203.652315] sock_ioctl+0x27b/0x4f0
[ 203.653058] __x64_sys_ioctl+0x124/0x190
[ 203.653850] do_syscall_64+0x35/0x80
[ 203.654608] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 203.666952] The buggy address belongs to the object at ffff888144df2000
which belongs to the cache kmalloc-256 of size 256
[ 203.669250] The buggy address is located 80 bytes inside of
256-byte region [ffff888144df2000, ffff888144df2100)
[ 203.671332] The buggy address belongs to the page:
[ 203.672273] page:00000000bf6c9314 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144df0
[ 203.674009] head:00000000bf6c9314 order:2 compound_mapcount:0 compound_pincount:0
[ 203.675422] flags: 0x2ffff800010200(slab|head|node=0|zone=2|lastcpupid=0x1ffff)
[ 203.676819] raw: 002ffff800010200 0000000000000000 dead000000000122 ffff888100042b40
[ 203.678384] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000
[ 203.679928] page dumped because: kasan: bad access detected
[ 203.681455] Memory state around the buggy address:
[ 203.682421] ffff888144df1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 203.683863] ffff888144df1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 203.685310] >ffff888144df2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 203.686701] ^
[ 203.687820] ffff888144df2080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 203.689226] ffff888144df2100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 203.690620] ==================================================================
Fixes: ad11c4f1d8fd ("net/mlx5e: Lag, Only handle events from highest priority multipath entry")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
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The arguments of update_buffer_lossy() is in a wrong order. Fix it.
Fixes: 88b3d5c90e96 ("net/mlx5e: Fix port buffers cell size value")
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
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Currently, match VLAN rule also matches packets that have multiple VLAN
headers. This behavior is similar to buggy flower classifier behavior that
has recently been fixed. Fix the issue by matching on
outer_second_cvlan_tag with value 0 which will cause the HW to verify the
packet doesn't contain second vlan header.
Fixes: 699e96ddf47f ("net/mlx5e: Support offloading tc double vlan headers match")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
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Resource dump menu may span over more than a single page, support it.
Otherwise, menu read may result in a memory access violation: reading
outside of the allocated page.
Note that page format of the first menu page contains menu headers while
the proceeding menu pages contain only records.
The KASAN logs are as follows:
BUG: KASAN: slab-out-of-bounds in strcmp+0x9b/0xb0
Read of size 1 at addr ffff88812b2e1fd0 by task systemd-udevd/496
CPU: 5 PID: 496 Comm: systemd-udevd Tainted: G B 5.16.0_for_upstream_debug_2022_01_10_23_12 #1
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x57/0x7d
print_address_description.constprop.0+0x1f/0x140
? strcmp+0x9b/0xb0
? strcmp+0x9b/0xb0
kasan_report.cold+0x83/0xdf
? strcmp+0x9b/0xb0
strcmp+0x9b/0xb0
mlx5_rsc_dump_init+0x4ab/0x780 [mlx5_core]
? mlx5_rsc_dump_destroy+0x80/0x80 [mlx5_core]
? lockdep_hardirqs_on_prepare+0x286/0x400
? raw_spin_unlock_irqrestore+0x47/0x50
? aomic_notifier_chain_register+0x32/0x40
mlx5_load+0x104/0x2e0 [mlx5_core]
mlx5_init_one+0x41b/0x610 [mlx5_core]
....
The buggy address belongs to the object at ffff88812b2e0000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 4048 bytes to the right of
4096-byte region [ffff88812b2e0000, ffff88812b2e1000)
The buggy address belongs to the page:
page:000000009d69807a refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88812b2e6000 pfn:0x12b2e0
head:000000009d69807a order:3 compound_mapcount:0 compound_pincount:0
flags: 0x8000000000010200(slab|head|zone=2)
raw: 8000000000010200 0000000000000000 dead000000000001 ffff888100043040
raw: ffff88812b2e6000 0000000080040000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88812b2e1e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88812b2e1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88812b2e1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88812b2e2000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88812b2e2080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Fixes: 12206b17235a ("net/mlx5: Add support for resource dump")
Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
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When OVS internal port is the vtep device, the first decap
rule is matching on the internal port's vport metadata value
and then changes the metadata to be the uplink's value.
Therefore, following rules on the tunnel, in chain > 0, should
avoid matching on internal port metadata and use the uplink
vport metadata instead.
Select the uplink's metadata value for the source vport match
in case the rule is in chain greater than zero, even if the tunnel
route device is internal port.
Fixes: 166f431ec6be ("net/mlx5e: Add indirect tc offload of ovs internal port")
Signed-off-by: Ariel Levkovich <lariel@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
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In bnxt_poll_p5(), we first check cpr->has_more_work. If it is true,
we are in NAPI polling mode and we will call __bnxt_poll_cqs() to
continue polling. It is possible to exhanust the budget again when
__bnxt_poll_cqs() returns.
We then enter the main while loop to check for new entries in the NQ.
If we had previously exhausted the NAPI budget, we may call
__bnxt_poll_work() to process an RX entry with zero budget. This will
cause packets to be dropped unnecessarily, thinking that we are in the
netpoll path. Fix it by breaking out of the while loop if we need
to process an RX NQ entry with no budget left. We will then exit
NAPI and stay in polling mode.
Fixes: 389a877a3b20 ("bnxt_en: Process the NQ under NAPI continuous polling.")
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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bnxt_ptp_init() calls bnxt_ptp_init_rtc() which will acquire the ptp_lock
spinlock. The spinlock is not initialized until later. Move the
bnxt_ptp_init_rtc() call after the spinlock is initialized.
Fixes: 24ac1ecd5240 ("bnxt_en: Add driver support to use Real Time Counter for PTP")
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Saravanan Vajravel <saravanan.vajravel@broadcom.com>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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bnxt_open() can fail in this code path, especially on a VF when
it fails to reserve default rings:
bnxt_open()
__bnxt_open_nic()
bnxt_clear_int_mode()
bnxt_init_dflt_ring_mode()
RX rings would be set to 0 when we hit this error path.
It is possible for a subsequent bnxt_open() call to potentially succeed
with a code path like this:
bnxt_open()
bnxt_hwrm_if_change()
bnxt_fw_init_one()
bnxt_fw_init_one_p3()
bnxt_set_dflt_rfs()
bnxt_rfs_capable()
bnxt_hwrm_reserve_rings()
On older chips, RFS is capable if we can reserve the number of vnics that
is equal to RX rings + 1. But since RX rings is still set to 0 in this
code path, we may mistakenly think that RFS is supported for 0 RX rings.
Later, when the default RX rings are reserved and we try to enable
RFS, it would fail and cause bnxt_open() to fail unnecessarily.
We fix this in 2 places. bnxt_rfs_capable() will always return false if
RX rings is not yet set. bnxt_init_dflt_ring_mode() will call
bnxt_set_dflt_rfs() which will always clear the RFS flags if RFS is not
supported.
Fixes: 20d7d1c5c9b1 ("bnxt_en: reliably allocate IRQ table on reset to avoid crash")
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The AlphaProject AP-SH4A-3A/AP-SH4AD-0A SH boards use IRQ0 for their SMSC
LAN911x Ethernet chip, so the networking on them must have been broken by
commit 965b2aa78fbc ("net/smsc911x: fix irq resource allocation failure")
which filtered out 0 as well as the negative error codes -- it was kinda
correct at the time, as platform_get_irq() could return 0 on of_irq_get()
failure and on the actual 0 in an IRQ resource. This issue was fixed by
me (back in 2016!), so we should be able to fix this driver to allow IRQ0
usage again...
When merging this to the stable kernels, make sure you also merge commit
e330b9a6bb35 ("platform: don't return 0 from platform_get_irq[_byname]()
on error") -- that's my fix to platform_get_irq() for the DT platforms...
Fixes: 965b2aa78fbc ("net/smsc911x: fix irq resource allocation failure")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/656036e4-6387-38df-b8a7-6ba683b16e63@omp.ru
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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As noted elsewhere, various GPON SFP modules exhibit non-standard
TX-fault behaviour. In the tested case, the Huawei MA5671A, when used
in combination with a Marvell mv88e6085 switch, was found to
persistently assert TX-fault, resulting in the module being disabled.
This patch adds a quirk to ignore the SFP_F_TX_FAULT state, allowing the
module to function.
Change from v1: removal of erroneous return statment (Andrew Lunn)
Signed-off-by: Matthew Hagan <mnhagan88@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220502223315.1973376-1-mnhagan88@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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check the return value of of_address_to_resource() and also add
missing of_node_put() for np and npp nodes.
Fixes: e0a3bc65448c ("net: emaclite: Support multiple phys connected to one MDIO bus")
Addresses-Coverity: Event check_return value.
Signed-off-by: Shravya Kumbham <shravya.kumbham@xilinx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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In xemaclite_open() function we are setting the max speed of
emaclite to 100Mb using phy_set_max_speed() function so,
there is no need to write the advertising registers to stop
giga-bit speed and the phy_start() function starts the
auto-negotiation so, there is no need to handle it separately
using advertising registers. Remove the phy_read and phy_write
of advertising registers in xemaclite_open() function.
Signed-off-by: Shravya Kumbham <shravya.kumbham@xilinx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Convert B53 to use phylink_pcs for the serdes rather than hooking it
into the MAC-layer callbacks.
Fixes: 81c1681cbb9f ("net: dsa: b53: mark as non-legacy")
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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with the usage of this function in nic_mbx_intr_handler().
Cache the Linux interrupt numbers in struct nicpf and use that cache in the
interrupt handler to select the mailbox.
Fixes: 495c66aca3da ("genirq/msi: Convert to new functions")
Reported-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sunil Goutham <sgoutham@marvell.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org
Cc: stable@vger.kernel.org
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2041772
Signed-off-by: David S. Miller <davem@davemloft.net>
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Based on DesignWare Ethernet QoS datasheet, we are seeing the limitation
of Split Header (SPH) feature is not supported for Ipv4 fragmented packet.
This SPH limitation will cause ping failure when the packets size exceed
the MTU size. For example, the issue happens once the basic ping packet
size is larger than the configured MTU size and the data is lost inside
the fragmented packet, replaced by zeros/corrupted values, and leads to
ping fail.
So, disable the Split Header for Intel platforms.
v2: Add fixes tag in commit message.
Fixes: 67afd6d1cfdf("net: stmmac: Add Split Header support and enable it in XGMAC cores")
Cc: <stable@vger.kernel.org> # 5.10.x
Suggested-by: Ong, Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: Mohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com>
Signed-off-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Signed-off-by: Tan Tee Min <tee.min.tan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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'tmp_node' need be put before returning from cpsw_probe_dt(),
so add missing of_node_put() in error path.
Fixes: ed3525eda4c4 ("net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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sun8i_dwmac_register_mdio_mux()
The node pointer returned by of_get_child_by_name() with refcount incremented,
so add of_node_put() after using it.
Fixes: 634db83b8265 ("net: stmmac: dwmac-sun8i: Handle integrated/external MDIOs")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220428095716.540452-1-yangyingliang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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