syzbot


general protection fault in ext4_fill_super
Status: upstream: reported C repro on 2022/01/17 08:23
Reported-by: syzbot+138c9e58e3cb22eae3b4@syzkaller.appspotmail.com
Fix commit: 7c268d4ce2d3 ext4: fix potential NULL pointer dereference in ext4_fill_super()
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte 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-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-riscv64]
First crash: 128d, last: 103d

Cause bisection: introduced by (bisect log) :
commit cebe85d570cf84804e848332d6721bc9e5300e07
Author: Lukas Czerner <lczerner@redhat.com>
Date: Wed Oct 27 14:18:56 2021 +0000

  ext4: switch to the new mount api

Crash: general protection fault in ext4_fill_super (log)
Repro: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2022/02/06 06:56 13m phind.uet@gmail.com linux-next OK

Sample crash report:

Crashes (4):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-smack-root 2022/02/05 19:50 upstream 0457e5153e0e a7dab638 .config log report syz C general protection fault in ext4_fill_super
ci-upstream-kasan-gce-smack-root 2022/02/05 19:32 upstream 0457e5153e0e a7dab638 .config log report info general protection fault in ext4_fill_super
ci-upstream-kasan-gce-smack-root 2022/01/12 15:05 upstream daadb3bd0e8d 44d1319a .config log report info general protection fault in ext4_fill_super
ci-qemu-upstream-386 2022/01/19 17:28 upstream 1d1df41c5a33 0620189b .config log report info general protection fault in ext4_fill_super