netdev - Re: [PATCH net-next] net: phylink: fix NULL pointer deref in phylink_major

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: 
 <176974143385.3149010.11826632323269107863.git-patchwork-notify@kernel.org>
Date: Fri, 30 Jan 2026 02:50:33 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
Cc: andrew@...n.ch, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 netdev@...r.kernel.org, pabeni@...hat.com
Subject: Re: [PATCH net-next] net: phylink: fix NULL pointer deref in
 phylink_major_config()

Hello:

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

On Wed, 28 Jan 2026 10:51:56 +0000 you wrote:
> When a MAC driver returns a PCS for an interface mode, and then we
> attempt to switch to a different mode that doesn't require a PCS,
> this causes phylink to oops:
> 
> Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010
> Mem abort info:
>   ESR = 0x0000000096000044
>   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 = 0x00000044, ISS2 = 0x00000000
>   CM = 0, WnR = 1, TnD = 0, TagAccess = 0
>   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
> user pgtable: 4k pages, 48-bit VAs, pgdp=0000000137f96000
> [0000000000000010] pgd=0000000000000000, p4d=0000000000000000
> Internal error: Oops: 0000000096000044 [#1]  SMP
> Modules linked in: --
> CPU: 1 UID: 0 PID: 55 Comm: kworker/u33:0 Not tainted 6.19.0-rc5-00581-g73cb8467a63e #1 PREEMPT
> Hardware name: Qualcomm Technologies, Inc. Lemans Ride Rev3 (DT)
> Workqueue: events_power_efficient phylink_resolve
> pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS    +BTYPE=--)
> pc : phylink_major_config+0x408/0x948
> lr : phylink_major_config+0x3fc/0x948
> sp : ffff800080353c60
> x29: ffff800080353cb0 x28: ffffb305068a8a00 x27: ffffb305068a8000
> x26: ffff000080092100 x25: 0000000000000000 x24: 0000000000000000
> x23: 0000000000000001 x22: 0000000000000000 x21: ffffb3050555b3d0
> x20: ffff800080353d10 x19: ffff0000b6059400 x18: 00000000ffffffff
> x17: 74756f2f79687020 x16: ffffb305045e4f18 x15: 6769666e6f632072
> x14: 6f6a616d203a3168 x13: 782d657361623030 x12: ffffb305068c6a98
> x11: 0000000000000583 x10: 0000000000000018 x9 : ffffb305068c6a98
> x8 : 0000000100006583 x7 : 0000000000000000 x6 : ffff00008083cc40
> x5 : ffff00008083cc40 x4 : 0000000000000001 x3 : 0000000000000001
> x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000b269e5a8
> Call trace:
>  phylink_major_config+0x408/0x948 (P)
>  phylink_resolve+0x294/0x6e4
>  process_one_work+0x148/0x28c
>  worker_thread+0x2d8/0x3d8
>  kthread+0x134/0x208
>  ret_from_fork+0x10/0x20
> Code: d63f0020 f9400e60 b4000040 f900081f (f9000ad3)
> 
> [...]

Here is the summary with links:
  - [net-next] net: phylink: fix NULL pointer deref in phylink_major_config()
    https://git.kernel.org/netdev/net-next/c/0e4d7df2f3b2

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html