linux-kernel - Re: [PATCH net 1/2] af_unix: Fix uninit-value in __unix_walk

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Message-Id: 
 <172006143113.17004.7669070239744050939.git-patchwork-notify@kernel.org>
Date: Thu, 04 Jul 2024 02:50:31 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Shigeru Yoshida <syoshida@...hat.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, kuniyu@...zon.com, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, syzkaller@...glegroups.com
Subject: Re: [PATCH net 1/2] af_unix: Fix uninit-value in __unix_walk_scc()

Hello:

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

On Wed,  3 Jul 2024 01:04:27 +0900 you wrote:
> KMSAN reported uninit-value access in __unix_walk_scc() [1].
> 
> In the list_for_each_entry_reverse() loop, when the vertex's index
> equals it's scc_index, the loop uses the variable vertex as a
> temporary variable that points to a vertex in scc. And when the loop
> is finished, the variable vertex points to the list head, in this case
> scc, which is a local variable on the stack (more precisely, it's not
> even scc and might underflow the call stack of __unix_walk_scc():
> container_of(&scc, struct unix_vertex, scc_entry)).
> 
> [...]

Here is the summary with links:
  - [net,1/2] af_unix: Fix uninit-value in __unix_walk_scc()
    https://git.kernel.org/netdev/net/c/927fa5b3e4f5
  - [net,2/2] selftest: af_unix: Add test case for backtrack after finalising SCC.
    https://git.kernel.org/netdev/net/c/2a79651bf2fa

You are awesome, thank you!
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