Re: INFO: rcu detected stall in sys_creat
From: Tetsuo Handa
Date: Sat Jan 19 2019 - 20:52:46 EST
On 2019/01/20 4:00, Dmitry Vyukov wrote:
> "On Sun, Oct 21, 2018 at 7:15 PM syzbot
> <syzbot+3155335ece2c94bead44@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>> syzbot found the following crash on:
>> HEAD commit: 8c60c36d0b8c Add linux-next specific files for 20181019
>> git tree: linux-next
>> console output: https://syzkaller.appspot.com/x/log.txt?x=160c9245400000
>> kernel config: https://syzkaller.appspot.com/x/.config?x=8b6d7c4c81535e89
>> dashboard link: https://syzkaller.appspot.com/bug?extid=3155335ece2c94bead44
>> compiler: gcc (GCC) 8.0.1 20180413 (experimental)
>> Unfortunately, I don't have any reproducer for this crash yet.
> +Tetsuo, Jan, Jens
> This is a stall, but it involves __getblk_gfp. Is it the same bug as
> "INFO: task hung in generic_file_write_iter":
> which will be fixed with "blockdev: Fix livelocks on loop device".
> This bug also has 10 other duplicates:
Yes, I think so.
#syz dup: INFO: task hung in generic_file_write_iter