netdev - Re: [PATCH] net: dsa: mv88e6060: prevent crash on an unused port

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Message-Id: <166035181383.28473.10389431989705713321.git-patchwork-notify@kernel.org>
Date:   Sat, 13 Aug 2022 00:50:13 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Sergei Antonov <saproj@...il.com>
Cc:     netdev@...r.kernel.org, vivien.didelot@...oirfairelinux.com,
        f.fainelli@...il.com, davem@...emloft.net, olteanv@...il.com
Subject: Re: [PATCH] net: dsa: mv88e6060: prevent crash on an unused port

Hello:

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

On Thu, 11 Aug 2022 10:09:39 +0300 you wrote:
> If the port isn't a CPU port nor a user port, 'cpu_dp'
> is a null pointer and a crash happened on dereferencing
> it in mv88e6060_setup_port():
> 
> [    9.575872] Unable to handle kernel NULL pointer dereference at virtual address 00000014
> ...
> [    9.942216]  mv88e6060_setup from dsa_register_switch+0x814/0xe84
> [    9.948616]  dsa_register_switch from mdio_probe+0x2c/0x54
> [    9.954433]  mdio_probe from really_probe.part.0+0x98/0x2a0
> [    9.960375]  really_probe.part.0 from driver_probe_device+0x30/0x10c
> [    9.967029]  driver_probe_device from __device_attach_driver+0xb8/0x13c
> [    9.973946]  __device_attach_driver from bus_for_each_drv+0x90/0xe0
> [    9.980509]  bus_for_each_drv from __device_attach+0x110/0x184
> [    9.986632]  __device_attach from bus_probe_device+0x8c/0x94
> [    9.992577]  bus_probe_device from deferred_probe_work_func+0x78/0xa8
> [    9.999311]  deferred_probe_work_func from process_one_work+0x290/0x73c
> [   10.006292]  process_one_work from worker_thread+0x30/0x4b8
> [   10.012155]  worker_thread from kthread+0xd4/0x10c
> [   10.017238]  kthread from ret_from_fork+0x14/0x3c
> 
> [...]

Here is the summary with links:
  - net: dsa: mv88e6060: prevent crash on an unused port
    https://git.kernel.org/netdev/net/c/246bbf2f977e

You are awesome, thank you!
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