syzbot


KASAN: null-ptr-deref Write in start_transaction
Status: fixed on 2021/03/10 01:48
Reported-by: syzbot+6700bca07dff187809c4@syzkaller.appspotmail.com
Fix commit: ecfdc08b8cc6 btrfs: remove dio iomap DSYNC workaround
First crash: 387d, last: 357d

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

Fix bisection: fixed by (bisect log) :
commit f30bed83426c5cb9fce6cabb3f7cc5a9d5428fcc
Author: Filipe Manana <fdmanana@suse.com>
Date: Fri Nov 13 11:24:17 2020 +0000

  btrfs: remove unnecessary attempt to drop extent maps after adding inline extent


Sample crash report:

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2020/11/06 18:47 upstream 521b619acdc8 64069d48 .config log report syz C