syzbot


KASAN: use-after-free Write in release_tty
Status: fixed on 2020/05/01 20:49
Reported-by: syzbot+699321b983dd2b7bfbcc@syzkaller.appspotmail.com
Fix commit: b9eb60a0ef39 vt: vt_ioctl: fix VT_DISALLOCATE freeing in-use virtual console
First crash: 896d, last: 777d

Fix bisection: fixed by (bisect log) :
commit b9eb60a0ef3971101c94f9cddb09708c2f900b35
Author: Eric Biggers <ebiggers@google.com>
Date: Sun Mar 22 03:43:04 2020 +0000

  vt: vt_ioctl: fix VT_DISALLOCATE freeing in-use virtual console

similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 KASAN: use-after-free Write in release_tty C done 148 780d 897d 1/1 fixed on 2020/04/28 10:48
upstream KASAN: use-after-free Write in release_tty C done 591 774d 896d 17/22 fixed on 2020/05/10 10:41

Sample crash report:

Crashes (124):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2020/03/29 08:46 linux-4.14.y 01364dad1d45 05736b29 .config log report syz C
ci2-linux-4-14 2020/03/24 08:29 linux-4.14.y 01364dad1d45 33e14df3 .config log report syz C
ci2-linux-4-14 2020/03/24 06:58 linux-4.14.y 01364dad1d45 33e14df3 .config log report syz C
ci2-linux-4-14 2020/03/22 19:08 linux-4.14.y 01364dad1d45 78267cec .config log report syz C
ci2-linux-4-14 2020/03/21 11:14 linux-4.14.y 01364dad1d45 aa6c6a55 .config log report syz C
ci2-linux-4-14 2020/03/20 21:55 linux-4.14.y 01364dad1d45 2c31c529 .config log report syz C
ci2-linux-4-14 2020/03/20 15:36 linux-4.14.y 01364dad1d45 2c31c529 .config log report syz C
ci2-linux-4-14 2020/03/18 13:55 linux-4.14.y 12cd844a39ed 0a96a13c .config log report syz C
ci2-linux-4-14 2020/03/14 23:47 linux-4.14.y 12cd844a39ed 749688d2 .config log report syz C
ci2-linux-4-14 2020/03/11 06:45 linux-4.14.y 78d697fc93f9 35f53e45 .config log report syz C
ci2-linux-4-14 2020/03/10 17:40 linux-4.14.y 78d697fc93f9 35f53e45 .config log report syz C
ci2-linux-4-14 2020/03/10 17:00 linux-4.14.y 78d697fc93f9 35f53e45 .config log report syz C
ci2-linux-4-14 2020/03/10 12:54 linux-4.14.y 78d697fc93f9 35f53e45 .config log report syz C
ci2-linux-4-14 2020/03/09 22:04 linux-4.14.y 78d697fc93f9 35f53e45 .config log report syz C
ci2-linux-4-14 2020/03/08 05:50 linux-4.14.y 78d697fc93f9 2e9971bb .config log report syz C
ci2-linux-4-14 2020/03/08 04:28 linux-4.14.y 78d697fc93f9 2e9971bb .config log report syz C
ci2-linux-4-14 2020/03/04 14:25 linux-4.14.y 78d697fc93f9 712198ac .config log report syz C
ci2-linux-4-14 2020/03/02 06:52 linux-4.14.y 78d697fc93f9 4a4e0509 .config log report syz C
ci2-linux-4-14 2020/02/29 23:38 linux-4.14.y 78d697fc93f9 c88c7b75 .config log report syz C
ci2-linux-4-14 2020/02/29 18:03 linux-4.14.y 78d697fc93f9 c88c7b75 .config log report syz C
ci2-linux-4-14 2020/02/28 20:23 linux-4.14.y 78d697fc93f9 c88c7b75 .config log report syz C
ci2-linux-4-14 2020/02/26 07:51 linux-4.14.y 98db2bf27b9e 4f588111 .config log report syz C
ci2-linux-4-14 2020/02/25 09:46 linux-4.14.y 98db2bf27b9e 59b57593 .config log report syz C
ci2-linux-4-14 2020/02/22 06:53 linux-4.14.y 98db2bf27b9e 2ffa6679 .config log report syz C
ci2-linux-4-14 2020/02/22 05:51 linux-4.14.y 98db2bf27b9e 2ffa6679 .config log report syz C
ci2-linux-4-14 2020/02/21 08:05 linux-4.14.y 98db2bf27b9e bd2a74a3 .config log report syz C
ci2-linux-4-14 2020/02/18 12:16 linux-4.14.y 98db2bf27b9e 1ce142dc .config log report syz C
ci2-linux-4-14 2020/02/17 17:52 linux-4.14.y 98db2bf27b9e 72bfa6f2 .config log report syz C
ci2-linux-4-14 2020/02/15 11:35 linux-4.14.y 98db2bf27b9e 5d7b90f1 .config log report syz C
ci2-linux-4-14 2020/02/14 16:13 linux-4.14.y e0f8b8a65a47 5d7b90f1 .config log report syz C
ci2-linux-4-14 2020/02/11 05:28 linux-4.14.y e0f8b8a65a47 d9e55b05 .config log report syz C
ci2-linux-4-14 2020/02/10 12:03 linux-4.14.y e0f8b8a65a47 35f5e45e .config log report syz C
ci2-linux-4-14 2020/02/10 01:50 linux-4.14.y e0f8b8a65a47 35f5e45e .config log report syz C
ci2-linux-4-14 2020/02/09 13:45 linux-4.14.y e0f8b8a65a47 6ece2ea5 .config log report syz C
ci2-linux-4-14 2020/02/08 05:41 linux-4.14.y e0f8b8a65a47 06150bf1 .config log report syz C
ci2-linux-4-14 2020/02/03 22:01 linux-4.14.y 9fa690a2a016 93e5e335 .config log report syz C
ci2-linux-4-14 2020/02/02 16:56 linux-4.14.y 9fa690a2a016 93e5e335 .config log report syz C
ci2-linux-4-14 2020/01/25 08:41 linux-4.14.y 8bac50406cca 2e95ab33 .config log report syz C
ci2-linux-4-14 2020/01/24 12:10 linux-4.14.y 8bac50406cca 2e95ab33 .config log report syz C
ci2-linux-4-14 2020/01/23 04:19 linux-4.14.y c1141b3aab36 3334d684 .config log report syz C
ci2-linux-4-14 2020/01/23 00:46 linux-4.14.y c1141b3aab36 3334d684 .config log report syz C
ci2-linux-4-14 2019/12/04 05:15 linux-4.14.y fbc5fe7a54d0 0ecb9746 .config log report syz C
ci2-linux-4-14 2020/04/01 11:25 linux-4.14.y 01364dad1d45 a34e2c33 .config log report
ci2-linux-4-14 2020/03/27 11:07 linux-4.14.y 01364dad1d45 9af8b4b3 .config log report
ci2-linux-4-14 2020/03/26 16:51 linux-4.14.y 01364dad1d45 6d25c5a0 .config log report
ci2-linux-4-14 2020/03/26 16:35 linux-4.14.y 01364dad1d45 6d25c5a0 .config log report
ci2-linux-4-14 2020/03/26 14:32 linux-4.14.y 01364dad1d45 6d25c5a0 .config log report
ci2-linux-4-14 2020/03/24 19:39 linux-4.14.y 01364dad1d45 68660b21 .config log report
ci2-linux-4-14 2020/03/21 18:26 linux-4.14.y 01364dad1d45 78267cec .config log report
ci2-linux-4-14 2020/03/08 14:01 linux-4.14.y 78d697fc93f9 2e9971bb .config log report
ci2-linux-4-14 2020/03/03 15:30 linux-4.14.y 78d697fc93f9 350a7a26 .config log report
ci2-linux-4-14 2020/02/26 05:13 linux-4.14.y 98db2bf27b9e 4f588111 .config log report
ci2-linux-4-14 2020/02/25 02:19 linux-4.14.y 98db2bf27b9e 59b57593 .config log report
ci2-linux-4-14 2020/02/19 05:50 linux-4.14.y 98db2bf27b9e 135c18aa .config log report
ci2-linux-4-14 2020/02/12 08:59 linux-4.14.y e0f8b8a65a47 a75b198c .config log report
ci2-linux-4-14 2020/02/10 10:45 linux-4.14.y e0f8b8a65a47 35f5e45e .config log report
ci2-linux-4-14 2020/02/06 22:07 linux-4.14.y e0f8b8a65a47 5be3a391 .config log report
ci2-linux-4-14 2020/02/06 14:27 linux-4.14.y e0f8b8a65a47 5be3a391 .config log report
ci2-linux-4-14 2020/02/02 03:00 linux-4.14.y 9fa690a2a016 2274ad39 .config log report
ci2-linux-4-14 2020/01/31 20:50 linux-4.14.y 9fa690a2a016 0eb59c27 .config log report
ci2-linux-4-14 2020/01/15 02:39 linux-4.14.y c04fc6fa5c96 fa12bd3c .config log report
ci2-linux-4-14 2020/01/13 18:21 linux-4.14.y 6d0c334a400d 99565c1a .config log report
ci2-linux-4-14 2020/01/13 00:41 linux-4.14.y 6d0c334a400d 53faa9fe .config log report
ci2-linux-4-14 2020/01/07 11:10 linux-4.14.y 84f5ad468100 1bcd407e .config log report
ci2-linux-4-14 2019/12/31 22:24 linux-4.14.y 4c5bf01e16a7 25a0186e .config log report
ci2-linux-4-14 2019/12/31 13:18 linux-4.14.y 4c5bf01e16a7 7f117e28 .config log report
ci2-linux-4-14 2019/12/28 20:47 linux-4.14.y e1f7d50ae3a3 af6b8ef8 .config log report
ci2-linux-4-14 2019/12/19 03:47 linux-4.14.y bfb9e5c03076 79b211f7 .config log report
ci2-linux-4-14 2019/12/15 00:08 linux-4.14.y a844dc4c5442 eef6e580 .config log report
ci2-linux-4-14 2019/12/09 17:47 linux-4.14.y a844dc4c5442 b31eda3d .config log report
ci2-linux-4-14 2019/12/07 21:55 linux-4.14.y a844dc4c5442 1508f453 .config log report
ci2-linux-4-14 2019/12/06 23:43 linux-4.14.y a844dc4c5442 85f26751 .config log report
ci2-linux-4-14 2019/12/06 04:41 linux-4.14.y a844dc4c5442 98b4ef2d .config log report
ci2-linux-4-14 2019/12/04 17:38 linux-4.14.y fbc5fe7a54d0 b2088328 .config log report
ci2-linux-4-14 2019/12/04 16:40 linux-4.14.y fbc5fe7a54d0 b2088328 .config log report
ci2-linux-4-14 2019/12/04 04:54 linux-4.14.y fbc5fe7a54d0 0ecb9746 .config log report