syzbot


WARNING in mntput_no_expire (2)
Status: upstream: reported C repro on 2021/04/01 09:09
Reported-by: syzbot+c88a7030da47945a3cc3@syzkaller.appspotmail.com
Fix commit: 7d01ef75 Make sure nd->path.mnt and nd->path.dentry are always valid pointers
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-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-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-arm32 ci-qemu2-riscv64 ci-upstream-bpf-next-kasan-gce ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386]
First crash: 22d, last: 12d

Cause bisection: introduced by (bisect log) :
commit 73d90386b559d6f4c3c5db5e6bb1b68aae8fd3e7
Author: Damien Le Moal <damien.lemoal@wdc.com>
Date: Thu Jan 28 04:47:27 2021 +0000

  nvme: cleanup zone information initialization

Crash: KASAN: use-after-free Read in chroot_fs_refs (log)
Repro: C syz .config
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in mntput_no_expire 1 97d 93d 0/22 auto-closed as invalid on 2021/03/16 10:44
Patch testing requests:
Created Duration User Patch Repo Result
2021/04/05 06:54 10m ducheng2@gmail.com upstream report log

Sample crash report:

Crashes (10):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/04/01 07:34 upstream d19cc4bf 6a81331a .config log report syz C WARNING in mntput_no_expire
ci-upstream-kasan-gce 2021/04/05 21:05 upstream 0a50438c 6a81331a .config log report info WARNING in mntput_no_expire
ci-upstream-kasan-gce 2021/04/05 19:33 upstream 0a50438c 6a81331a .config log report info WARNING in mntput_no_expire
ci-upstream-kasan-gce 2021/04/05 13:11 upstream e49d033b 6a81331a .config log report info WARNING in mntput_no_expire
ci-upstream-kasan-gce 2021/04/04 08:07 upstream 2023a53b 6a81331a .config log report info WARNING in mntput_no_expire
ci-upstream-kasan-gce 2021/04/02 12:43 upstream 1678e493 6a81331a .config log report info WARNING in mntput_no_expire
ci-upstream-kasan-gce 2021/04/01 18:53 upstream ffd9fb54 6a81331a .config log report info WARNING in mntput_no_expire
ci-upstream-kasan-gce 2021/04/01 04:22 upstream d19cc4bf 6a81331a .config log report info WARNING in mntput_no_expire
ci-upstream-linux-next-kasan-gce-root 2021/04/10 11:21 linux-next e99d8a84 bfeda1b1 .config log report info WARNING in mntput_no_expire
ci-upstream-linux-next-kasan-gce-root 2021/04/08 13:02 linux-next 6145d80c 6a81331a .config log report info WARNING in mntput_no_expire