INFO: task can't die in submit_bio_wait

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 52c7b727581f Add linux-next specific files for 20210831
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13385659300000
kernel config: https://syzkaller.appspot.com/x/.config?x=c643ef5289990dd1
dashboard link: https://syzkaller.appspot.com/bug?extid=4a3e6acc53d47f048291
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1
CC: [ax...@kernel.dk linux...@vger.kernel.org linux-...@vger.kernel.org]

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4a3e6a...@syzkaller.appspotmail.com

INFO: task syz-executor.5:22740 can't die for more than 143 seconds.
task:syz-executor.5 state:D stack:24568 pid:22740 ppid: 7049 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4955 [inline]
__schedule+0x940/0x26f0 kernel/sched/core.c:6302
schedule+0xd3/0x270 kernel/sched/core.c:6381
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
io_schedule_timeout+0xcb/0x140 kernel/sched/core.c:8392
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common_io kernel/sched/completion.c:123 [inline]
wait_for_completion_io_timeout+0x171/0x280 kernel/sched/completion.c:191
submit_bio_wait+0x158/0x230 block/bio.c:1253
blkdev_issue_flush+0xd6/0x130 block/blk-flush.c:458


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.