syzbot


INFO: task hung in __generic_file_fsync (2)
Status: fixed on 2020/02/18 10:28
Reported-by: syzbot+44c32606d8669fb0d45c@syzkaller.appspotmail.com
Fix commit: 85a8ce62c2ea block: add bio_truncate to fix guard_bio_eod
First crash: 830d, last: 705d

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 Cause bisect Fix bisect Count Last Reported Patched Status
android-49 INFO: task hung in __generic_file_fsync 1 826d 826d 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 VM info Title
ci-upstream-kasan-gce-selinux-root 2019/12/28 20:27 upstream bf8d1cd43865 af6b8ef8 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2019/12/29 13:29 linux-next 7ddd09fc4b74 af6b8ef8 .config log report syz C
ci-upstream-kasan-gce-root 2020/01/03 02:58 upstream 7ca4ad5ba886 25a0186e .config log report
ci-upstream-kasan-gce-root 2019/12/27 19:44 upstream 46cf053efec6 be5c2c81 .config log report
ci-upstream-kasan-gce-root 2019/12/24 01:33 upstream 46cf053efec6 be5c2c81 .config log report
ci-upstream-kasan-gce-root 2019/12/22 05:25 upstream b8e382a185eb bc586918 .config log report
ci-upstream-kasan-gce-selinux-root 2019/11/30 04:42 upstream 81b6b96475ac 3a75be00 .config log report
ci-upstream-kasan-gce-root 2019/11/29 20:21 upstream 81b6b96475ac d29b9e84 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/29 14:37 upstream 81b6b96475ac d29b9e84 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/29 00:23 upstream 81b6b96475ac 76357d6f .config log report
ci-upstream-kasan-gce-smack-root 2019/11/27 21:23 upstream d76886972823 0d63f89c .config log report
ci-upstream-kasan-gce-smack-root 2019/11/27 07:49 upstream 89d57dddd7d3 1048481f .config log report
ci-upstream-kasan-gce-smack-root 2019/11/27 07:38 upstream 89d57dddd7d3 1048481f .config log report
ci-upstream-kasan-gce-smack-root 2019/11/26 17:57 upstream be2eca94d144 1048481f .config log report
ci-upstream-kasan-gce-smack-root 2019/11/26 13:18 upstream 0be0ee71816b f746151a .config log report
ci-upstream-kasan-gce-smack-root 2019/11/25 00:25 upstream 6b8a79467876 598ca6c8 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/24 11:20 upstream 6b8a79467876 598ca6c8 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/23 19:50 upstream 2027cabe6afe 598ca6c8 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/23 10:56 upstream 2027cabe6afe 598ca6c8 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/22 00:47 upstream 81429eb8d9ca 8098ea0f .config log report
ci-upstream-kasan-gce-root 2019/11/21 04:12 upstream c74386d50fba 8098ea0f .config log report
ci-upstream-kasan-gce-smack-root 2019/11/20 21:13 upstream c74386d50fba 8098ea0f .config log report
ci-upstream-kasan-gce-smack-root 2019/11/20 20:10 upstream c74386d50fba 8098ea0f .config log report
ci-upstream-kasan-gce-smack-root 2019/11/20 18:32 upstream c74386d50fba f4b7ed07 .config log report
ci-upstream-kasan-gce-smack-root 2019/11/20 10:50 upstream c74386d50fba f4b7ed07 .config log report
ci-upstream-kasan-gce-root 2019/09/02 09:47 upstream 9f159ae07f07 db7c31ca .config log report
ci-upstream-kasan-gce-selinux-root 2019/08/31 04:33 upstream 6525771f58cb fd37b39e .config log report
ci-upstream-linux-next-kasan-gce-root 2019/12/26 08:47 linux-next 7ddd09fc4b74 be5c2c81 .config log report