KASAN: slab-out-of-bounds Write in gfs2_fill_super
Status: upstream: reported C repro on 2020/09/30 12:39
Fix commit: 0ddc5154 gfs2: add validation checks for size of superblock
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 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-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386]
First crash: 26d, last: 26d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: C syz .config
duplicates (1):
Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
UBSAN: array-index-out-of-bounds in init_sb C done 2 15d 13d 0/17 closed as dup on 2020/10/14 19:24
Patch testing requests:
Created Duration User Patch Repo Result
2020/10/14 15:36 16m patch upstream OK
2020/10/14 15:30 16m patch upstream OK
2020/10/14 14:16 16m patch upstream OK
2020/10/14 11:26 16m patch upstream OK
2020/10/14 11:25 10m patch upstream report log
2020/10/03 05:44 0m patch git:// fb0155a0 error
2020/10/02 12:59 9m 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 2020/09/29 14:14 upstream fb0155a0 1b88c6d5 .config log report syz C,,,