syzbot


KASAN: user-memory-access Read in put_page
Status: upstream: reported C repro on 2020/04/06 18:16
Reported-by: syzbot+b4501d3e966ff59f6090@syzkaller.appspotmail.com
First crash: 60d, last: 60d

Cause bisection: introduced by (bisect log):

commit 4426e945df588f2878affddf88a51259200f7e29
Author: Peter Xu <peterx@redhat.com>
Date: Thu Apr 2 04:08:49 2020 +0000

  mm/gup: allow VM_FAULT_RETRY for multiple times

Crash: general protection fault in kernel_get_mempolicy (log)
Repro: C syz .config

Fix bisection: failed (bisect log)

Sample crash report:

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro
ci-upstream-kasan-gce-smack-root 2020/04/03 15:27 upstream bef7b2a7 5ed396e6 .config log report syz C
ci-upstream-kasan-gce-smack-root 2020/04/03 12:40 upstream bef7b2a7 5ed396e6 .config log report
ci-upstream-kasan-gce-smack-root 2020/04/03 12:09 upstream bef7b2a7 5ed396e6 .config log report