syzbot


INFO: rcu detected stall in do_swap_page
Status: upstream: reported syz repro on 2019/07/24 19:18
Reported-by: syzbot+2a89b1fb6539ff150c16@syzkaller.appspotmail.com
First crash: 380d, last: 380d

Cause bisection: introduced by (bisect log):

commit 575088f60021e69a9ee8292ddc33b3196c53c239
Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Fri Jan 18 08:32:26 2019 +0000

  Merge tag 'fixes-for-v5.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus

Crash: INFO: rcu detected stall in mem_cgroup_from_task (log)
Repro: syz .config

Fix bisection: fixed by (bisect log):

commit 32aaf0553df99cc4314f6e9f43216cd83afc6c20
Author: Pengfei Li <lpf.vector@gmail.com>
Date: Mon Sep 23 22:36:58 2019 +0000

  mm/compaction.c: remove unnecessary zone parameter in isolate_migratepages()


Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro
ci-upstream-kasan-gce-root 2019/07/22 12:09 upstream c6dd78fc b3c615f5 .config log report syz
ci-upstream-kasan-gce-root 2019/07/22 06:12 upstream c6dd78fc b3c615f5 .config log report