Re: [PATCH net-next v3 2/9] Bluetooth: L2CAP: do not leave dangling sk pointer on error in l2cap_sock_create()

[Kuniyuki Iwashima]

From: Ignat Korchagin <ignat@xxxxxxxxxxxxxx>
Date: Mon, 14 Oct 2024 16:38:01 +0100
> bt_sock_alloc() allocates the sk object and attaches it to the provided
> sock object. On error l2cap_sock_alloc() frees the sk object, but the
> dangling pointer is still attached to the sock object, which may create
> use-after-free in other code.
> 
> Signed-off-by: Ignat Korchagin <ignat@xxxxxxxxxxxxxx>

Reviewed-by: Kuniyuki Iwashima <kuniyu@xxxxxxxxxx>

Checked all bt_sock_alloc() paths and confirmed only rfcomm and l2cap
need changes.