Re: INFO: rcu detected stall in pfkey_sendmsg
From: Florian Westphal
Date: Wed Dec 19 2018 - 14:49:30 EST
Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote:
> On Wed, Dec 19, 2018 at 7:37 PM syzbot
> <syzbot+e1d3a7522b4d05aeede4@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> > Hello,
> > syzbot found the following crash on:
> > HEAD commit: a26d94bff4d5 net: bridge: remove unneeded variable 'err'
> > git tree: net-next
> > console output: https://syzkaller.appspot.com/x/log.txt?x=14c7a4cd400000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=d9655b05acfc97ff
> > dashboard link: https://syzkaller.appspot.com/bug?extid=e1d3a7522b4d05aeede4
> > compiler: gcc (GCC) 8.0.1 20180413 (experimental)
> > Unfortunately, I don't have any reproducer for this crash yet.
> +Florian, this looks related to:
> INFO: rcu detected stall in xfrm_hash_rebuild
> Should we dup them?
No, not yet anyway. First report triggers rcu stall during hash
rebuild, this looks like stall is directly on insertion.
(Could obviously still be same bug).