syzbot


general protection fault in madvise_cold_or_pageout_pte_range
Status: upstream: reported C repro on 2020/09/14 09:29
Reported-by: syzbot+ecf80462cb7d5d552bc7@syzkaller.appspotmail.com
Fix commit: mm: validate pmd after splitting
Patched on: [ci-upstream-linux-next-kasan-gce-root], missing on: [ci-qemu-upstream ci-qemu-upstream-386 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb]
First crash: 9d08h, last: 9d08h

Cause bisection: introduced by (bisect log):

commit 1a4e58cce84ee88129d5d49c064bd2852b481357
Author: Minchan Kim <minchan@kernel.org>
Date: Wed Sep 25 23:49:15 2019 +0000

  mm: introduce MADV_PAGEOUT

Crash: general protection fault in madvise_cold_pte_range (log)
Repro: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2020/09/14 12:36 9m anmol.karan123@gmail.com upstream report log

Sample crash report:

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Maintainers
ci-upstream-kasan-gce-smack-root 2020/09/12 20:39 upstream 729e3d09 ce441f06 .config log report syz C akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org