linux-kernel - Re: [PATCH v2] Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_ready

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Date:   Wed, 31 May 2023 19:00:21 +0000
From:   patchwork-bot+bluetooth@...nel.org
To:     Sungwoo Kim <iam@...g-woo.kim>
Cc:     wuruoyu@...com, benquike@...il.com, daveti@...due.edu,
        marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] Bluetooth: L2CAP: Fix use-after-free in
 l2cap_sock_ready_cb

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@...el.com>:

On Wed, 31 May 2023 01:39:56 -0400 you wrote:
> l2cap_sock_release(sk) frees sk. However, sk's children are still alive
> and point to the already free'd sk's address.
> To fix this, l2cap_sock_release(sk) also cleans sk's children.
> 
> ==================================================================
> BUG: KASAN: use-after-free in l2cap_sock_ready_cb+0xb7/0x100 net/bluetooth/l2cap_sock.c:1650
> Read of size 8 at addr ffff888104617aa8 by task kworker/u3:0/276
> 
> [...]

Here is the summary with links:
  - [v2] Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_ready_cb
    https://git.kernel.org/bluetooth/bluetooth-next/c/8f514cf70050

You are awesome, thank you!
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