Re: INFO: rcu detected stall in ext4_file_write_iter

To: syzbot <syzbot+7d19c5fe6a3f1161abb7@xxxxxxxxxxxxxxxxxxxxxxxxx>, acme@xxxxxxxxxx, adilger.kernel@xxxxxxxxx, dvyukov@xxxxxxxxxx, fweisbec@xxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, ming.lei@xxxxxxxxxx, mingo@xxxxxxxxxx, mingo@xxxxxxxxxx, penguin-kernel@xxxxxxxxxxxxxxxxxxx, peterz@xxxxxxxxxxxxx, syzkaller-bugs@xxxxxxxxxxxxxxxx, tglx@xxxxxxxxxxxxx, tytso@xxxxxxx
Subject: Re: INFO: rcu detected stall in ext4_file_write_iter
From: Jens Axboe <axboe@xxxxxxxxx>
Date: Fri, 11 Sep 2020 14:03:33 -0600
In-reply-to: <00000000000029b48f05af0ec14f@google.com>
References: <00000000000029b48f05af0ec14f@google.com>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

#syz fix: block: allow for_each_bvec to support zero len bvec


-- 
Jens Axboe

References:
- Re: INFO: rcu detected stall in ext4_file_write_iter
  - From: syzbot