syzbot


KASAN: null-ptr-deref Write in blk_mq_map_swqueue
Status: upstream: reported C repro on 2020/03/26 19:33
Reported-by: syzbot+313d95e8a7a49263f88d@syzkaller.appspotmail.com
Fix commit: blk-mq: Fix a recently introduced regression in
Patched on: [], missing on: [ci-qemu-upstream ci-qemu-upstream-386 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]
First crash: 104d, last: 68d

Cause bisection: introduced by (bisect log):

commit 768134d4f48109b90f4248feecbeeb7d684e410c
Author: Jens Axboe <axboe@kernel.dk>
Date: Mon Nov 11 03:30:53 2019 +0000

  io_uring: don't do flush cancel under inflight_lock

Crash: general protection fault in batadv_iv_ogm_queue_add (log)
Repro: C syz .config

Sample crash report:

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci-upstream-kasan-gce-selinux-root 2020/03/26 19:33 upstream 1b649e0b 6d25c5a0 .config log report syz C axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kasan-gce-selinux-root 2020/03/26 18:31 upstream 1b649e0b 6d25c5a0 .config log report axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root 2020/02/19 12:55 linux-next 1d7f85df 135c18aa .config log report axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org