syzbot


kernel BUG in mpage_prepare_extent_to_map
Status: upstream: reported C repro on 2021/05/31 07:15
Reported-by: syzbot+99043e2052d9c50c81fc@syzkaller.appspotmail.com
First crash: 65d, last: 19d

Cause bisection: introduced by (bisect log) :
commit 68e9dc29f8f42c79d2a3755223ed910ce36b4ae2
Author: Yuyang Du <duyuyang@gmail.com>
Date: Mon May 6 08:19:36 2019 +0000

  locking/lockdep: Check redundant dependency only when CONFIG_LOCKDEP_SMALL

Crash: BUG: MAX_STACK_TRACE_ENTRIES too low! (log)
Repro: C syz .config
similar bugs (7):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-54 kernel BUG at fs/ext4/inode.c:LINE! C 42 70d 564d 0/1 upstream: reported C repro on 2020/01/14 12:13
linux-4.19 kernel BUG at fs/ext4/inode.c:LINE! C 1 9d00h 290d 0/1 upstream: reported C repro on 2020/10/14 01:19
upstream kernel BUG at fs/ext4/inode.c:LINE! C done 9 213d 338d 21/22 fixed on 2021/03/10 01:48
android-49 kernel BUG at fs/ext4/inode.c:LINE! C 280 913d 842d 0/3 public: reported C repro on 2019/04/11 08:44
linux-4.14 kernel BUG at fs/ext4/inode.c:LINE! C 2 21d 218d 0/1 upstream: reported C repro on 2020/12/25 03:51
android-414 kernel BUG at fs/ext4/inode.c:LINE! 1 988d 840d 0/1 auto-closed as invalid on 2019/05/15 13:37
android-44 kernel BUG at fs/ext4/inode.c:LINE! C 110 930d 842d 0/2 public: reported C repro on 2019/04/11 08:44

Sample crash report:

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2021/07/12 22:17 upstream 7fef2edf7cc7 1ba81399 .config log report syz C
Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2021/06/12 21:55 upstream ad347abe4a98 1ba81399 .config log report syz C kernel BUG in ext4_writepages
ci-qemu-upstream 2021/05/27 04:59 upstream 7ac3a1c1ae51 858ea628 .config log report info kernel BUG in mpage_prepare_extent_to_map