syzbot


INFO: rcu detected stall in ext4_file_write_iter
Status: fixed on 2020/09/25 01:17
Reported-by: syzbot+7d19c5fe6a3f1161abb7@syzkaller.appspotmail.com
Fix commit: 7e249690 block: allow for_each_bvec to support zero len bvec
First crash: 640d, last: 70d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: INFO: rcu detected stall in ext4_file_write_iter (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log):

commit 7e24969022cbd61ddc586f14824fc205661bb124
Author: Ming Lei <ming.lei@redhat.com>
Date: Mon Aug 17 10:00:55 2020 +0000

  block: allow for_each_bvec to support zero len bvec

similar bugs (3):
Kernel Title Repro Bisected Count Last Reported Patched Status
android-49 INFO: rcu detected stall in ext4_file_write_iter syz 2 504d 546d 0/3 public: reported syz repro on 2019/04/23 08:58
linux-4.14 INFO: rcu detected stall in ext4_file_write_iter C 7 24d 556d 0/1 upstream: reported C repro on 2019/04/12 16:30
linux-4.19 INFO: rcu detected stall in ext4_file_write_iter C 7 8d14h 548d 0/1 upstream: reported C repro on 2019/04/20 13:09

Sample crash report:

Crashes (93):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Maintainers
ci-upstream-kasan-gce-root 2020/07/28 11:24 upstream 92ed3019 cb93dc6a .config log report syz C fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-selinux-root 2020/07/27 20:57 upstream 92ed3019 cb93dc6a .config log report syz C fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce 2020/07/25 15:41 upstream 68845a55 1f7cc1ca .config log report syz C fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce 2020/07/24 04:54 upstream d15be546 70c104a1 .config log report syz C fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root 2019/06/22 20:00 upstream abf02e29 34bf9440 .config log report syz C linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-root 2019/05/03 16:28 upstream ea986679 1bfa09b9 .config log report syz C akpm@linux-foundation.org, amir73il@gmail.com, darrick.wong@oracle.com, hannes@cmpxchg.org, hughd@google.com, josef@toxicpanda.com, jrdr.linux@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, rppt@linux.ibm.com, willy@infradead.org
ci-upstream-kasan-gce-root 2019/04/12 03:29 upstream 2d06b235 13030ef8 .config log report syz C christian@brauner.io, ebiederm@xmission.com, jannh@google.com, keescook@chromium.org, linux-kernel@vger.kernel.org, serge@hallyn.com
ci-upstream-kasan-gce-selinux-root 2019/02/22 06:00 upstream 8a61716f 7ff74a98 .config log report syz C adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-linux-next-kasan-gce-root 2020/07/30 16:29 linux-next 04b45717 233283a1 .config log report syz C fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-linux-next-kasan-gce-root 2019/06/30 05:07 linux-next 48568d8c 7509bf36 .config log report syz C adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-kasan-gce-root 2020/07/28 01:23 upstream 92ed3019 cb93dc6a .config log report syz fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-selinux-root 2020/07/27 09:43 upstream 92ed3019 51265195 .config log report syz fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root 2020/07/25 11:27 upstream 68845a55 1f7cc1ca .config log report syz fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-linux-next-kasan-gce-root 2020/07/27 05:47 linux-next 26027945 51265195 .config log report syz fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-selinux-root 2020/08/11 10:29 upstream 00e4db51 bacaf5fa .config log report fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root 2020/07/29 09:26 upstream 6ba1b005 19a8de55 .config log report linux-kernel@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-selinux-root 2020/05/23 21:45 upstream 423b8baf 9682898d .config log report linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-root 2020/04/21 02:39 upstream ae83d0b4 98a9f9e6 .config log report adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-kasan-gce-root 2020/04/18 08:08 upstream 95988fbc 435c6d53 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-root 2020/04/02 21:11 upstream 7be97138 a34e2c33 .config log report adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-kasan-gce-root 2020/03/26 03:05 upstream 1b649e0b e8e6c7d2 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-selinux-root 2020/03/19 18:23 upstream cd607737 2c31c529 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-root 2020/03/11 09:50 upstream e9414845 35f53e45 .config log report linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-selinux-root 2020/03/04 15:44 upstream 63623fd4 c88c7b75 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-selinux-root 2020/02/28 07:43 upstream f8788d86 59b57593 .config log report adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-kasan-gce-root 2020/02/17 15:26 upstream 11a48a5a 2b411596 .config log report adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-kasan-gce-selinux-root 2020/02/17 12:56 upstream 11a48a5a 2b411596 .config log report adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-kasan-gce-selinux-root 2020/02/15 22:49 upstream 829e6944 5d7b90f1 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2020/02/12 14:36 upstream 359c92c0 84f4fc8a .config log report adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-kasan-gce-selinux-root 2020/02/12 03:58 upstream 359c92c0 a75b198c .config log report adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-kasan-gce-selinux-root 2020/02/11 15:39 upstream 0a679e13 4d1ab643 .config log report linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-root 2020/02/03 23:16 upstream 754beeec 93e5e335 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-root 2020/01/12 22:47 upstream 6327edce 31290a45 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2020/01/08 02:23 upstream ae608821 6738e0b3 .config log report akpm@linux-foundation.org, cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@kernel.org, vdavydov.dev@gmail.com
ci-upstream-kasan-gce-smack-root 2020/01/08 01:13 upstream ae608821 6738e0b3 .config log report akpm@linux-foundation.org, christian@brauner.io, keescook@chromium.org, linux-kernel@vger.kernel.org, luto@amacapital.net, mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de, wad@chromium.org
ci-upstream-kasan-gce-root 2019/12/25 18:45 upstream 46cf053e be5c2c81 .config log report linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-selinux-root 2019/12/21 11:32 upstream 6398b9fc bc586918 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-kasan-gce-smack-root 2019/12/03 09:47 upstream 596cf45c ab342da3 .config log report akpm@linux-foundation.org, cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@kernel.org, vdavydov.dev@gmail.com
ci-upstream-kasan-gce-smack-root 2019/12/02 23:38 upstream 596cf45c ab342da3 .config log report aarcange@redhat.com, akpm@linux-foundation.org, christian@brauner.io, christian@kellner.me, cyphar@cyphar.com, elena.reshetova@intel.com, jgg@ziepe.ca, keescook@chromium.org, ldv@altlinux.org, linux-kernel@vger.kernel.org, luto@amacapital.net, mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de, viro@zeniv.linux.org.uk, wad@chromium.org
ci-upstream-kasan-gce-root 2019/07/20 15:14 upstream abdfd52a 1656845f .config log report
ci-upstream-kasan-gce-smack-root 2019/06/20 07:02 upstream abf02e29 34bf9440 .config log report linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-selinux-root 2019/06/14 09:21 upstream c11fb13a 998ccc76 .config log report adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-kasan-gce-smack-root 2019/06/14 09:19 upstream c11fb13a 998ccc76 .config log report adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-kasan-gce-root 2019/06/14 09:19 upstream c11fb13a 998ccc76 .config log report linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-root 2019/06/13 12:05 upstream b076173a 3f4e812b .config log report linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-smack-root 2019/01/19 05:29 upstream 2339e91d 2103a236 .config log report akpm@linux-foundation.org, amir73il@gmail.com, darrick.wong@oracle.com, david@fromorbit.com, hannes@cmpxchg.org, hughd@google.com, jrdr.linux@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, willy@infradead.org
ci-upstream-linux-next-kasan-gce-root 2020/06/13 19:36 linux-next e7b08814 dbce178a .config log report fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-linux-next-kasan-gce-root 2020/06/13 06:12 linux-next e7b08814 f4724dd3 .config log report fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-linux-next-kasan-gce-root 2020/04/14 14:59 linux-next f19bb13a 3f3c5574 .config log report adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-linux-next-kasan-gce-root 2020/03/09 22:00 linux-next 770fbb32 35f53e45 .config log report linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/02/18 07:04 linux-next c25a951c 1ce142dc .config log report linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/02/16 03:06 linux-next 9f01828e 5d7b90f1 .config log report akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org
ci-upstream-linux-next-kasan-gce-root 2020/02/06 18:46 linux-next a0c61bf1 c91cbc9d .config log report linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2019/07/20 01:36 linux-next 6d21a41b 1656845f .config log report
ci-upstream-linux-next-kasan-gce-root 2019/07/02 08:57 linux-next 48a8a5f9 cccc4302 .config log report akpm@linux-foundation.org, amir73il@gmail.com, darrick.wong@oracle.com, hannes@cmpxchg.org, hughd@google.com, josef@toxicpanda.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, willy@infradead.org
ci-upstream-linux-next-kasan-gce-root 2019/06/23 05:58 linux-next dc636f5d 34bf9440 .config log report adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu
ci-upstream-linux-next-kasan-gce-root 2019/06/17 14:26 linux-next a125097c 442206d7 .config log report akpm@linux-foundation.org, bfoster@redhat.com, dchinner@redhat.com, gthelen@google.com, jack@suse.cz, laoar.shao@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mojha@codeaurora.org, rppt@linux.ibm.com, tglx@linutronix.de, tj@kernel.org, willy@infradead.org