syzbot


UBSAN: shift-out-of-bounds in erofs_fc_fill_super
Status: fixed on 2021/04/09 19:46
Reported-by: syzbot+c68f467cd7c45860e8d4@syzkaller.appspotmail.com
Fix commit: bde545295b71 erofs: fix shift-out-of-bounds of blkszbits
First crash: 323d, last: 289d

Cause bisection: introduced by (bisect log) [release commit]:
commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun Sep 15 21:19:32 2019 +0000

  Linux 5.3

Crash: UBSAN: undefined-behaviour in erofs_fill_super (log)
Repro: C syz .config

Sample crash report:

Crashes (11):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2021/01/15 23:53 linux-next b3a3cbdec55b 65a7a854 .config log report syz C
ci-upstream-kasan-gce-root 2021/02/18 19:22 upstream f40ddce88593 14052202 .config log report info UBSAN: shift-out-of-bounds in erofs_fc_fill_super
ci-upstream-kasan-gce-root 2021/02/18 02:51 upstream f40ddce88593 14052202 .config log report info UBSAN: shift-out-of-bounds in erofs_fc_fill_super
ci-upstream-kasan-gce-root 2021/02/17 15:39 upstream f40ddce88593 052f8d9f .config log report info UBSAN: shift-out-of-bounds in erofs_fc_fill_super
ci-upstream-kasan-gce-selinux-root 2021/02/15 20:46 upstream f40ddce88593 98682e5e .config log report info UBSAN: shift-out-of-bounds in erofs_fc_fill_super
ci-upstream-kasan-gce-smack-root 2021/02/15 20:13 upstream f40ddce88593 98682e5e .config log report info UBSAN: shift-out-of-bounds in erofs_fc_fill_super
ci-upstream-kasan-gce-selinux-root 2021/02/15 12:39 upstream f40ddce88593 98682e5e .config log report info UBSAN: shift-out-of-bounds in erofs_fc_fill_super
ci-upstream-kasan-gce-smack-root 2021/01/29 03:05 upstream e5ff2cb9cf67 7df34f59 .config log report info UBSAN: shift-out-of-bounds in erofs_fc_fill_super
ci-upstream-kasan-gce-smack-root 2021/01/29 03:05 upstream e5ff2cb9cf67 7df34f59 .config log report info UBSAN: shift-out-of-bounds in erofs_fc_fill_super
ci-upstream-kasan-gce-root 2021/01/29 02:43 upstream e5ff2cb9cf67 7df34f59 .config log report info UBSAN: shift-out-of-bounds in erofs_fc_fill_super
ci-upstream-linux-next-kasan-gce-root 2021/01/15 17:59 linux-next b3a3cbdec55b 65a7a854 .config log report info