Re: [syzbot] INFO: task can't die in blkdev_common_ioctl

Tetsuo Handa
2022-04-02T11:26:37Z

On 2022/04/02 16:20, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: f81e94e91878 Add linux-next specific files for 20211125
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=168d578db00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=be9183de0824e4d7
> dashboard link: https://syzkaller.appspot.com/bug?extid=4f1a237abaf14719db49
> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
>
> Unfortunately, I don't have any reproducer for this issue yet.

This is a known problem, and Christoph does not like a mitigation patch.
https://lkml.kernel.org/r/YgoQBTzb3b0l1SzP@infradead.org

>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+4f1a237abaf14719db49@syzkaller.appspotmail.com

#syz dup: INFO: task hung in blkdev_fallocate