Re: [PATCH] Bluetooth: prefetch channel before killing sock
From: Marcel Holtmann <marcel@holtmann.org>
Date: 2020-02-05 08:06:05
Also in:
linux-bluetooth, lkml
Hi Hillf,
Prefetch channel before killing sock in order to fix UAF like
BUG: KASAN: use-after-free in l2cap_sock_release+0x24c/0x290 net/bluetooth/l2cap_sock.c:1212
Read of size 8 at addr ffff8880944904a0 by task syz-fuzzer/9751
Reported-by: syzbot+c3c5bdea7863886115dc@syzkaller.appspotmail.com
Fixes: 6c08fc896b60 ("Bluetooth: Fix refcount use-after-free issue")
Cc: Manish Mandlik <redacted>
Signed-off-by: Hillf Danton <redacted>
---patch has been applied to bluetooth-next tree. Regards Marcel