syzbot


WARNING in blk_rq_append_bio
Status: upstream: reported C repro on 2021/05/17 11:27
Reported-by: syzbot+1c24e3484e48799b2333@syzkaller.appspotmail.com
Fix commit: cbb749cf377a block: remove an incorrect check from blk_rq_append_bio
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-kmsan-gce ci-upstream-kmsan-gce-386 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]
First crash: 108d, last: 103d

Cause bisection: introduced by (bisect log) :
commit 393bb12e00580aaa23356504eed38d8f5571153a
Author: Christoph Hellwig <hch@lst.de>
Date: Wed Mar 31 07:30:01 2021 +0000

  block: stop calling blk_queue_bounce for passthrough requests

Crash: WARNING in blk_rq_append_bio (log)
Repro: C syz .config

Sample crash report:

Crashes (6):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2021/04/07 22:36 linux-next 5103a5be098c 6a81331a .config log report syz C WARNING in blk_rq_append_bio
ci-upstream-linux-next-kasan-gce-root 2021/04/12 15:57 linux-next 5df924d19629 bfeda1b1 .config log report info WARNING in blk_rq_append_bio
ci-upstream-linux-next-kasan-gce-root 2021/04/12 09:09 linux-next e99d8a849517 bfeda1b1 .config log report info WARNING in blk_rq_append_bio
ci-upstream-linux-next-kasan-gce-root 2021/04/10 15:12 linux-next e99d8a849517 bfeda1b1 .config log report info WARNING in blk_rq_append_bio
ci-upstream-linux-next-kasan-gce-root 2021/04/08 22:39 linux-next 6145d80cfc62 6a81331a .config log report info WARNING in blk_rq_append_bio
ci-upstream-linux-next-kasan-gce-root 2021/04/07 13:26 linux-next 5103a5be098c 6a81331a .config log report info WARNING in blk_rq_append_bio