Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | Hillf Danton <> | Subject | Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in hci_conn_drop (2) | Date | Sun, 18 Feb 2024 16:44:14 +0800 |
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On Fri, 16 Feb 2024 18:09:19 -0800 > syzbot has found a reproducer for the following issue on: > > HEAD commit: 2c3b09aac00d Add linux-next specific files for 20240214 > git tree: linux-next > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16c27a58180000
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 2c3b09aac00d
--- x/net/bluetooth/sco.c +++ y/net/bluetooth/sco.c @@ -297,6 +297,7 @@ static int sco_connect(struct sock *sk) sco_sock_set_timer(sk, sk->sk_sndtimeo); } + hci_conn_get(hcon); release_sock(sk); unlock: @@ -439,12 +440,15 @@ static void __sco_sock_close(struct sock case BT_CONNECTED: case BT_CONFIG: if (sco_pi(sk)->conn->hcon) { + struct hci_conn *hcon = sco_pi(sk)->conn->hcon; + sk->sk_state = BT_DISCONN; sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); sco_conn_lock(sco_pi(sk)->conn); - hci_conn_drop(sco_pi(sk)->conn->hcon); sco_pi(sk)->conn->hcon = NULL; sco_conn_unlock(sco_pi(sk)->conn); + + hci_conn_put(hcon); } else sco_chan_del(sk, ECONNRESET); break; --
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