syzbot


kernel BUG in split_huge_page_to_list
Status: upstream: reported C repro on 2021/01/24 12:01
Reported-by: syzbot+9b83ff893245a25c320e@syzkaller.appspotmail.com
First crash: 109d, last: 109d

Cause bisection: introduced by (bisect log) :
commit fbdbae3da30a149a55a5f1883bbbe17a27660e05
Author: Li Xinhai <lixinhai.lxh@gmail.com>
Date: Tue Jan 19 21:54:00 2021 +0000

  mm: mremap: unlink anon_vmas when mremap with MREMAP_DONTUNMAP success

Crash: kernel BUG in split_huge_page_to_list (log)
Repro: C syz .config
similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG at mm/huge_memory.c:LINE! (2) 1 247d 243d 0/22 auto-closed as invalid on 2021/01/02 13:21
upstream kernel BUG at mm/huge_memory.c:LINE! 27 687d 857d 13/22 fixed on 2019/09/06 20:45
linux-4.14 kernel BUG at mm/huge_memory.c:LINE! 1 135d 135d 0/1 auto-closed as invalid on 2021/04/24 02:20
Patch testing requests:
Created Duration User Patch Repo Result
2021/02/03 14:32 15m lixinhai.lxh@gmail.com git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 95f0ca46d8041d6a1ffe5e1162210a2050c053b8 OK

Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2021/01/20 16:37 linux-next 647060f3 d4f4eca5 .config log report syz C kernel BUG in split_huge_page_to_list
ci-upstream-linux-next-kasan-gce-root 2021/01/20 11:59 linux-next 647060f3 d4f4eca5 .config log report info kernel BUG in split_huge_page_to_list