From: syzbot <syzbot+e5e64cdf8e92046dd3e1@syzkaller.appspotmail.com>
To: qianqiang.liu@163.com
Cc: qianqiang.liu@163.com, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in release_sock (2)
Date: Thu, 28 Aug 2025 07:19:04 -0700 [thread overview]
Message-ID: <68b06558.050a0220.3db4df.0022.GAE@google.com> (raw)
In-Reply-To: <aLBlIsFngakFf5vO@Mac.bbrouter>
> #syz test
This crash does not have a reproducer. I cannot test it.
>
> --- a/net/bluetooth/af_bluetooth.c 2025-08-28 22:02:06
> +++ b/net/bluetooth/af_bluetooth.c 2025-08-28 22:13:46
> @@ -292,14 +292,12 @@
> */
> goto restart;
> }
> -
> - /* sk is safely in the parent list so reduce reference count */
> - sock_put(sk);
>
> /* FIXME: Is this check still needed */
> if (sk->sk_state == BT_CLOSED) {
> bt_accept_unlink(sk);
> release_sock(sk);
> + sock_put(sk);
> continue;
> }
>
> @@ -310,10 +308,12 @@
> sock_graft(sk, newsock);
>
> release_sock(sk);
> + sock_put(sk);
> return sk;
> }
>
> release_sock(sk);
> + sock_put(sk);
> }
>
> return NULL;
>
> --
> Best,
> Qianqiang Liu
>
next parent reply other threads:[~2025-08-28 14:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <aLBlIsFngakFf5vO@Mac.bbrouter>
2025-08-28 14:19 ` syzbot [this message]
2025-08-27 20:33 syzbot
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