netdev - Re: [PATCH net] net/smc: do not leave a dangling sk pointer in __smc

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Message-Id: 
 <173100843274.2072933.7772314537199195964.git-patchwork-notify@kernel.org>
Date: Thu, 07 Nov 2024 19:40:32 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Eric Dumazet <edumazet@...gle.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
 netdev@...r.kernel.org, eric.dumazet@...il.com, kuniyu@...zon.com,
 ignat@...udflare.com, alibuda@...ux.alibaba.com, wenjia@...ux.ibm.com,
 dust.li@...ux.alibaba.com
Subject: Re: [PATCH net] net/smc: do not leave a dangling sk pointer in
 __smc_create()

Hello:

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

On Wed,  6 Nov 2024 22:19:22 +0000 you wrote:
> Thanks to commit 4bbd360a5084 ("socket: Print pf->create() when
> it does not clear sock->sk on failure."), syzbot found an issue with AF_SMC:
> 
> smc_create must clear sock->sk on failure, family: 43, type: 1, protocol: 0
>  WARNING: CPU: 0 PID: 5827 at net/socket.c:1565 __sock_create+0x96f/0xa30 net/socket.c:1563
> Modules linked in:
> CPU: 0 UID: 0 PID: 5827 Comm: syz-executor259 Not tainted 6.12.0-rc6-next-20241106-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
>  RIP: 0010:__sock_create+0x96f/0xa30 net/socket.c:1563
> Code: 03 00 74 08 4c 89 e7 e8 4f 3b 85 f8 49 8b 34 24 48 c7 c7 40 89 0c 8d 8b 54 24 04 8b 4c 24 0c 44 8b 44 24 08 e8 32 78 db f7 90 <0f> 0b 90 90 e9 d3 fd ff ff 89 e9 80 e1 07 fe c1 38 c1 0f 8c ee f7
> RSP: 0018:ffffc90003e4fda0 EFLAGS: 00010246
> RAX: 099c6f938c7f4700 RBX: 1ffffffff1a595fd RCX: ffff888034823c00
> RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> RBP: 00000000ffffffe9 R08: ffffffff81567052 R09: 1ffff920007c9f50
> R10: dffffc0000000000 R11: fffff520007c9f51 R12: ffffffff8d2cafe8
> R13: 1ffffffff1a595fe R14: ffffffff9a789c40 R15: ffff8880764298c0
> FS:  000055557b518380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007fa62ff43225 CR3: 0000000031628000 CR4: 00000000003526f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
>  <TASK>
>   sock_create net/socket.c:1616 [inline]
>   __sys_socket_create net/socket.c:1653 [inline]
>   __sys_socket+0x150/0x3c0 net/socket.c:1700
>   __do_sys_socket net/socket.c:1714 [inline]
>   __se_sys_socket net/socket.c:1712 [inline]
> 
> [...]

Here is the summary with links:
  - [net] net/smc: do not leave a dangling sk pointer in __smc_create()
    https://git.kernel.org/netdev/net/c/d293958a8595

You are awesome, thank you!
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