syzbot


kernel BUG in remove_inode_hugepages
Status: upstream: reported C repro on 2021/08/17 02:07
Reported-by: syzbot+67654e51e54455f1c585@syzkaller.appspotmail.com
Fix commit: c7b1850dfb41 hugetlb: don't pass page cache pages to restore_reserve_on_error
Patched on: [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-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386]
First crash: 63d, last: 31d

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: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2021/08/18 02:36 16m mike.kravetz@oracle.com patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git a2824f19e6065a0d3735acd9fe7155b104e7edf5 OK

Sample crash report:

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/08/17 02:06 upstream a2824f19e606 33c26cb7 .config log report syz C kernel BUG in remove_inode_hugepages
ci-upstream-kasan-gce 2021/08/17 01:48 upstream a2824f19e606 33c26cb7 .config log report info kernel BUG in remove_inode_hugepages
ci-upstream-kasan-gce-selinux-root 2021/07/15 21:31 upstream 8096acd7442e b9a2f64e .config log report info kernel BUG in remove_inode_hugepages