syzbot


BUG: unable to handle kernel paging request in percpu_ref_exit
Status: fixed on 2021/03/10 01:48
Reported-by: syzbot+99ed55100402022a6276@syzkaller.appspotmail.com
Fix commit: 3e2224c5867f io_uring: Fix return value from alloc_fixed_file_ref_node
First crash: 327d, last: 325d

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
Patch testing requests:
Created Duration User Patch Repo Result
2021/01/09 16:44 15m asml.silence@gmail.com git://git.kernel.dk/linux-block d9d05217cb6990b9a56e13b56e7a1b71e2551f6c OK

Sample crash report:

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/01/07 17:23 upstream 71c061d24438 c104d4a3 .config log report syz C
ci-upstream-kasan-gce 2021/01/05 16:36 upstream 36bbbd0e234d a0234d98 .config log report syz C
ci-upstream-kasan-gce 2021/01/05 16:16 upstream 36bbbd0e234d a0234d98 .config log report info