linux-kernel - Re: [PATCH net v1] mlxbf_gige: stop interface during shutdown

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Date: Fri, 29 Mar 2024 15:50:29 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: David Thompson <davthompson@...dia.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, u.kleine-koenig@...gutronix.de, leon@...nel.org,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v1] mlxbf_gige: stop interface during shutdown

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Mon, 25 Mar 2024 17:09:29 -0400 you wrote:
> The mlxbf_gige driver intermittantly encounters a NULL pointer
> exception while the system is shutting down via "reboot" command.
> The mlxbf_driver will experience an exception right after executing
> its shutdown() method.  One example of this exception is:
> 
> Unable to handle kernel NULL pointer dereference at virtual address 0000000000000070
> Mem abort info:
>   ESR = 0x0000000096000004
>   EC = 0x25: DABT (current EL), IL = 32 bits
>   SET = 0, FnV = 0
>   EA = 0, S1PTW = 0
>   FSC = 0x04: level 0 translation fault
> Data abort info:
>   ISV = 0, ISS = 0x00000004
>   CM = 0, WnR = 0
> user pgtable: 4k pages, 48-bit VAs, pgdp=000000011d373000
> [0000000000000070] pgd=0000000000000000, p4d=0000000000000000
> Internal error: Oops: 96000004 [#1] SMP
> CPU: 0 PID: 13 Comm: ksoftirqd/0 Tainted: G S         OE     5.15.0-bf.6.gef6992a #1
> Hardware name: https://www.mellanox.com BlueField SoC/BlueField SoC, BIOS 4.0.2.12669 Apr 21 2023
> pstate: 20400009 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> pc : mlxbf_gige_handle_tx_complete+0xc8/0x170 [mlxbf_gige]
> lr : mlxbf_gige_poll+0x54/0x160 [mlxbf_gige]
> sp : ffff8000080d3c10
> x29: ffff8000080d3c10 x28: ffffcce72cbb7000 x27: ffff8000080d3d58
> x26: ffff0000814e7340 x25: ffff331cd1a05000 x24: ffffcce72c4ea008
> x23: ffff0000814e4b40 x22: ffff0000814e4d10 x21: ffff0000814e4128
> x20: 0000000000000000 x19: ffff0000814e4a80 x18: ffffffffffffffff
> x17: 000000000000001c x16: ffffcce72b4553f4 x15: ffff80008805b8a7
> x14: 0000000000000000 x13: 0000000000000030 x12: 0101010101010101
> x11: 7f7f7f7f7f7f7f7f x10: c2ac898b17576267 x9 : ffffcce720fa5404
> x8 : ffff000080812138 x7 : 0000000000002e9a x6 : 0000000000000080
> x5 : ffff00008de3b000 x4 : 0000000000000000 x3 : 0000000000000001
> x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
> Call trace:
>  mlxbf_gige_handle_tx_complete+0xc8/0x170 [mlxbf_gige]
>  mlxbf_gige_poll+0x54/0x160 [mlxbf_gige]
>  __napi_poll+0x40/0x1c8
>  net_rx_action+0x314/0x3a0
>  __do_softirq+0x128/0x334
>  run_ksoftirqd+0x54/0x6c
>  smpboot_thread_fn+0x14c/0x190
>  kthread+0x10c/0x110
>  ret_from_fork+0x10/0x20
> Code: 8b070000 f9000ea0 f95056c0 f86178a1 (b9407002)
> 
> [...]

Here is the summary with links:
  - [net,v1] mlxbf_gige: stop interface during shutdown
    https://git.kernel.org/netdev/net/c/09ba28e1cd3c

You are awesome, thank you!
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