syzbot


kernel BUG in __tlb_remove_page_size
Status: upstream: reported syz repro on 2021/07/08 04:37
Reported-by: syzbot+2f816ba9b71ca9a8e6b0@syzkaller.appspotmail.com
First crash: 75d, last: 71d

Cause bisection: introduced by (bisect log) [no-op commit]:
commit b9fc8b4a591811546fec2dbef7e9f809362100c9
Author: Grant Seltzer <grantseltzer@gmail.com>
Date: Mon Feb 22 19:58:46 2021 +0000

  bpf: Add kernel/modules BTF presence checks to bpftool feature command

Crash: WARNING in kvm_wait (log)
Repro: syz .config

Fix bisection: fixed by (bisect log) :
commit af0efa050caa66e8f304c42c94c76cb6c480cb7e
Author: Toke Høiland-Jørgensen <toke@redhat.com>
Date: Tue Jul 6 12:23:55 2021 +0000

  libbpf: Restore errno return for functions that were already returning it


Sample crash report:

Crashes (4):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-386 2021/07/04 04:45 upstream 3dbdb38e2869 55aa55c2 .config log report syz kernel BUG in __tlb_remove_page_size
ci-upstream-kasan-gce-selinux-root 2021/07/07 15:54 upstream 3dbdb38e2869 4846d5c1 .config log report info kernel BUG in __tlb_remove_page_size
ci-upstream-kasan-gce-selinux-root 2021/07/05 16:25 upstream 3dbdb38e2869 55aa55c2 .config log report info kernel BUG in __tlb_remove_page_size
ci-upstream-kasan-gce-386 2021/07/04 04:31 upstream 3dbdb38e2869 55aa55c2 .config log report info kernel BUG in __tlb_remove_page_size