syzbot


general protection fault in try_grab_compound_head
Status: upstream: reported C repro on 2021/07/03 15:41
Reported-by: syzbot+a3fcd59df1b372066f5a@syzkaller.appspotmail.com
Fix commit: d08af0a59684 mm/hugetlb: fix refs calculation from unaligned @vaddr
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 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-qemu2-arm32 ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386]
First crash: 93d, last: 47d

Cause bisection: introduced by (bisect log) :
commit 997acaf6b4b59c6a9c259740312a69ea549cc684
Author: Mark Rutland <mark.rutland@arm.com>
Date: Mon Jan 11 15:37:07 2021 +0000

  lockdep: report broken irq restoration

Crash: WARNING in kvm_wait (log)
Repro: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2021/07/03 21:38 17m ayush@disroot.org patch upstream error

Sample crash report:

Crashes (5):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/07/03 15:40 upstream 3dbdb38e2869 55aa55c2 .config log report syz C general protection fault in try_grab_compound_head
ci-upstream-kasan-gce 2021/07/03 15:24 upstream 3dbdb38e2869 55aa55c2 .config log report info general protection fault in try_grab_compound_head
ci-upstream-kasan-gce 2021/06/15 14:12 upstream 009c9aa5be65 58636922 .config log report info general protection fault in try_grab_compound_head
ci-upstream-kmsan-gce 2021/07/31 16:39 https://github.com/google/kmsan.git master dfab4dc3af38 6c236867 .config log report info KMSAN: uninit-value in try_grab_compound_head
ci-upstream-kmsan-gce-386 2021/07/31 16:40 https://github.com/google/kmsan.git master dfab4dc3af38 6c236867 .config log report info KMSAN: uninit-value in try_grab_compound_head