syzbot


INFO: task hung in __generic_file_fsync (2)
Status: upstream: reported C repro on 2020/01/01 20:45
Reported-by: syzbot+44c32606d8669fb0d45c@syzkaller.appspotmail.com
Fix commit: 85a8ce62 block: add bio_truncate to fix guard_bio_eod
Patched on: [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-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]
First crash: 170d, last: 45d

Cause bisection: introduced by (bisect log):

commit 6dc4f100c175dd0511ae8674786e7c9006cdfbfa
Author: Ming Lei <ming.lei@redhat.com>
Date: Fri Feb 15 11:13:19 2019 +0000

  block: allow bio_for_each_segment_all() to iterate over multi-page bvec

Crash: kernel BUG at mm/filemap.c:LINE! (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log):

commit 85a8ce62c2eabe28b9d76ca4eecf37922402df93
Author: Ming Lei <ming.lei@redhat.com>
Date: Fri Dec 27 23:05:48 2019 +0000

  block: add bio_truncate to fix guard_bio_eod

similar bugs (1):
Kernel Title Repro Bisected Count Last Reported Patched Status
android-49 INFO: task hung in __generic_file_fsync 1 165d 165d 0/3 auto-closed as invalid on 2020/01/02 10:29

Sample crash report:

Crashes (28):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci-upstream-kasan-gce-selinux-root 2019/12/28 20:27 upstream bf8d1cd4 af6b8ef8 .config log report syz C akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-linux-next-kasan-gce-root 2019/12/29 13:29 linux-next 7ddd09fc af6b8ef8 .config log report syz C akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-root 2020/01/03 02:58 upstream 7ca4ad5b 25a0186e .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-root 2019/12/27 19:44 upstream 46cf053e be5c2c81 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-root 2019/12/24 01:33 upstream 46cf053e be5c2c81 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-root 2019/12/22 05:25 upstream b8e382a1 bc586918 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-selinux-root 2019/11/30 04:42 upstream 81b6b964 3a75be00 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-root 2019/11/29 20:21 upstream 81b6b964 d29b9e84 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/29 14:37 upstream 81b6b964 d29b9e84 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/29 00:23 upstream 81b6b964 76357d6f .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/27 21:23 upstream d7688697 0d63f89c .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/27 07:49 upstream 89d57ddd 1048481f .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/27 07:38 upstream 89d57ddd 1048481f .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/26 17:57 upstream be2eca94 1048481f .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/26 13:18 upstream 0be0ee71 f746151a .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/25 00:25 upstream 6b8a7946 598ca6c8 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/24 11:20 upstream 6b8a7946 598ca6c8 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/23 19:50 upstream 2027cabe 598ca6c8 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/23 10:56 upstream 2027cabe 598ca6c8 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/22 00:47 upstream 81429eb8 8098ea0f .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-root 2019/11/21 04:12 upstream c74386d5 8098ea0f .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/20 21:13 upstream c74386d5 8098ea0f .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/20 20:10 upstream c74386d5 8098ea0f .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/20 18:32 upstream c74386d5 f4b7ed07 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/11/20 10:50 upstream c74386d5 f4b7ed07 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-root 2019/09/02 09:47 upstream 9f159ae0 db7c31ca .config log report akpm@linux-foundation.org, amir73il@gmail.com, darrick.wong@oracle.com, hannes@cmpxchg.org, josef@toxicpanda.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, willy@infradead.org
ci-upstream-kasan-gce-selinux-root 2019/08/31 04:33 upstream 6525771f fd37b39e .config log report akpm@linux-foundation.org, amir73il@gmail.com, darrick.wong@oracle.com, hannes@cmpxchg.org, jack@suse.cz, josef@toxicpanda.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, willy@infradead.org
ci-upstream-linux-next-kasan-gce-root 2019/12/26 08:47 linux-next 7ddd09fc be5c2c81 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org