Re: INFO: task hung in iterate_supers

On 2018/07/10 19:34, Tetsuo Handa wrote: > It turned out that, although the reason of stalling v9fs_mount() is currently > unknown, the reason of many processes stuck at iterate_supers() is that > they are unable to take s->s_umount object due to down_write_nested() below. > > /* >*

Re: INFO: task hung in iterate_supers

Since syzbot found a C reproducer, I reproduced locally with below change applied. diff --git a/kernel/hung_task.c b/kernel/hung_task.c index 32b4794..aca1cca 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -115,13 +115,6 @@ static void check_h

INFO: task hung in iterate_supers

Hello, syzbot found the following crash on: HEAD commit:d00d6d9a339d Add linux-next specific files for 20180709 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=79b240 kernel config: https://syzkaller.appspot.com/x/.config?x=94fe2b586beccacd dashb