syzbot


BUG: unable to handle kernel NULL pointer dereference in __lookup_slow
Status: fixed on 2021/03/10 01:48
Reported-by: syzbot+3db80bbf66b88d68af9d@syzkaller.appspotmail.com
Fix commit: d24396c5290b reiserfs: add check for an invalid ih_entry_count
First crash: 436d, last: 294d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log) :
commit d24396c5290ba8ab04ba505176874c4e04a2d53c
Author: Rustam Kovhaev <rkovhaev@gmail.com>
Date: Sun Nov 1 14:09:58 2020 +0000

  reiserfs: add check for an invalid ih_entry_count

similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 BUG: unable to handle kernel NULL pointer dereference in __lookup_slow (2) C done 15 116d 239d 1/1 fixed on 2021/09/13 16:54
upstream BUG: unable to handle kernel NULL pointer dereference in __lookup_slow (2) C inconclusive 4 154d 237d 0/22 upstream: reported C repro on 2021/04/13 05:55
linux-4.19 BUG: unable to handle kernel NULL pointer dereference in __lookup_slow C done 23 273d 431d 1/1 fixed on 2021/04/10 11:48

Sample crash report:

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-smack-root 2020/12/10 04:33 upstream a68a0262abda c090b4da .config log report syz C
ci-upstream-kasan-gce-selinux-root 2021/02/15 16:12 upstream f40ddce88593 98682e5e .config log report info BUG: unable to handle kernel NULL pointer dereference in __lookup_slow
ci-upstream-kasan-gce-selinux-root 2020/09/26 18:15 upstream 7c7ec3226f5f 2d5ea0cb .config log report info