syzbot


UBSAN: shift-out-of-bounds in sfq_init
Status: fixed on 2021/03/10 01:48
Reported-by: syzbot+97c5bd9cc81eca63d36e@syzkaller.appspotmail.com
Fix commit: bd1248f1 net: sched: prevent invalid Scell_log shift count
First crash: 113d, last: 95d

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 sfq_init (log)
Repro: C syz .config
duplicates (1):
Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
UBSAN: shift-out-of-bounds in choke_change C inconclusive 15 44d 102d 0/22 closed as dup on 2020/12/29 20:08

Sample crash report:

Crashes (8):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2020/12/19 01:25 upstream a409ed15 04201c06 .config log report syz C
ci-upstream-net-this-kasan-gce 2020/12/19 01:49 net d64c6f96 04201c06 .config log report syz C
ci-upstream-kasan-gce 2020/12/19 01:07 upstream a409ed15 04201c06 .config log report info
ci-upstream-net-this-kasan-gce 2020/12/25 15:54 net 1f45dc22 b982b3ea .config log report info
ci-upstream-net-kasan-gce 2021/01/05 22:18 net-next 3db1a3fa a0234d98 .config log report info
ci-upstream-net-kasan-gce 2021/01/02 12:05 net-next 3db1a3fa 79264ae3 .config log report info
ci-upstream-net-kasan-gce 2020/12/30 08:53 net-next 3db1a3fa 0fa352f2 .config log report info
ci-upstream-net-kasan-gce 2020/12/29 01:15 net-next 3db1a3fa 8259d56c .config log report info