syzbot


KASAN: null-ptr-deref Write in kthread_use_mm
Status: fixed on 2020/11/20 14:54
Reported-by: syzbot+b57abf7ee60829090495@syzkaller.appspotmail.com
Fix commit: 4b70cf9dea4c io_uring: ensure consistent view of original task ->mm from SQPOLL
First crash: 394d, last: 392d

Cause bisection: introduced by (bisect log) :
commit 4d004099a668c41522242aa146a38cc4eb59cb1e
Author: Peter Zijlstra <peterz@infradead.org>
Date: Fri Oct 2 09:04:21 2020 +0000

  lockdep: Fix lockdep recursion

Crash: BUG: using __this_cpu_read() in preemptible code in trace_hardirqs_on (log)
Repro: C syz .config

Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2020/11/02 05:47 linux-next 4e78c578cb98 8bc4594f .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/10/30 21:47 linux-next 4e78c578cb98 a6e3ac3b .config log report syz C