netdev - Re: [PATCH net] xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL

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Date: Sat, 06 Apr 2024 06:10:29 +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, syzkaller@...glegroups.com,
 bjorn@...nel.org, magnus.karlsson@...el.com, maciej.fijalkowski@...el.com,
 jonathan.lemon@...il.com, bpf@...r.kernel.org
Subject: Re: [PATCH net] xsk: validate user input for
 XDP_{UMEM|COMPLETION}_FILL_RING

Hello:

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

On Thu,  4 Apr 2024 20:27:38 +0000 you wrote:
> syzbot reported an illegal copy in xsk_setsockopt() [1]
> 
> Make sure to validate setsockopt() @optlen parameter.
> 
> [1]
> 
>  BUG: KASAN: slab-out-of-bounds in copy_from_sockptr_offset include/linux/sockptr.h:49 [inline]
>  BUG: KASAN: slab-out-of-bounds in copy_from_sockptr include/linux/sockptr.h:55 [inline]
>  BUG: KASAN: slab-out-of-bounds in xsk_setsockopt+0x909/0xa40 net/xdp/xsk.c:1420
> Read of size 4 at addr ffff888028c6cde3 by task syz-executor.0/7549
> 
> [...]

Here is the summary with links:
  - [net] xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING
    https://git.kernel.org/netdev/net/c/237f3cf13b20

You are awesome, thank you!
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