KASAN: use-after-free Read in corrupted

5 views
Skip to first unread message

syzbot

unread,
Nov 15, 2020, 5:58:17 AM11/15/20
to syzkaller...@googlegroups.com
Hello,

syzbot found the following issue on:

HEAD commit: 27ce4f2a Linux 4.14.206
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16cd29d6500000
kernel config: https://syzkaller.appspot.com/x/.config?x=32258a0e1fac372d
dashboard link: https://syzkaller.appspot.com/bug?extid=3da5492d1fd6b9cb59e7
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16f34fbe500000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3da549...@syzkaller.appspotmail.com

wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x2c57/0x3f20 kernel/locking/lockdep.c:3369
Read of size 8 at addr ffff8880b4a85a68 by task loop4/11598

CPU: 0 PID: 11598 Comm: loop4 Not tainted 4.14.206-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x283 lib/dump_stack.c:58
print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
Reply all
Reply to author
Forward
0 new messages