syzbot


general protection fault in unlink_file_vma
Status: upstream: reported C repro on 2020/09/09 00:19
Reported-by: syzbot+c5d5a51dcbb558ca0cb5@syzkaller.appspotmail.com
Fix commit: bc4fe4cd mm: mmap: Fix general protection fault in unlink_file_vma()
Patched 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-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-kmsan-gce ci-upstream-kmsan-gce-386]
First crash: 52d, last: 52d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2020/09/16 06:50 11m linmiaohe@huawei.com https://github.com/Linmiaohe/linux vma_merge_fix report log
2020/09/16 01:48 11m linmiaohe@huawei.com https://github.com/Linmiaohe/linux vma_merge_fix report log
2020/09/14 06:42 11m linmiaohe@huawei.com https://github.com/Linmiaohe/linux/ 796cd8f497d5b62b00667229375326381c32bdb3 report log
2020/09/09 18:46 11m 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 2020/09/05 00:10 upstream 59126901 abf9ba4f .config log report syz C akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org