From: Jakub Kicinski <jakub.kicinski@netronome.com>
To: Eric Biggers <ebiggers@kernel.org>
Cc: Steffen Klassert <steffen.klassert@secunet.com>,
syzbot <syzbot+6a9ff159672dfbb41c95@syzkaller.appspotmail.com>,
ast@kernel.org, aviadye@mellanox.com, borisp@mellanox.com,
bpf@vger.kernel.org, daniel@iogearbox.net, davejwatson@fb.com,
davem@davemloft.net, hdanton@sina.com, john.fastabend@gmail.com,
netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com,
herbert@gondor.apana.org.au, linux-crypto@vger.kernel.org
Subject: Re: INFO: task hung in tls_sw_release_resources_tx
Date: Mon, 19 Aug 2019 14:12:55 -0700 [thread overview]
Message-ID: <20190819141255.010a323a@cakuba.netronome.com> (raw)
In-Reply-To: <20190817054743.GE8209@sol.localdomain>
On Fri, 16 Aug 2019 22:47:43 -0700, Eric Biggers wrote:
> [+Steffen, who is the maintainer of pcrypt]
>
> On Fri, Aug 16, 2019 at 07:02:34PM -0700, Jakub Kicinski wrote:
> > On Thu, 15 Aug 2019 11:06:00 -0700, syzbot wrote:
> > > syzbot has bisected this bug to:
> > >
> > > commit 130b392c6cd6b2aed1b7eb32253d4920babb4891
> > > Author: Dave Watson <davejwatson@fb.com>
> > > Date: Wed Jan 30 21:58:31 2019 +0000
> > >
> > > net: tls: Add tls 1.3 support
> > >
> > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=118e8dee600000
> > > start commit: 6d5afe20 sctp: fix memleak in sctp_send_reset_streams
> > > git tree: net
> > > final crash: https://syzkaller.appspot.com/x/report.txt?x=138e8dee600000
> > > console output: https://syzkaller.appspot.com/x/log.txt?x=158e8dee600000
> > > kernel config: https://syzkaller.appspot.com/x/.config?x=a4c9e9f08e9e8960
> > > dashboard link: https://syzkaller.appspot.com/bug?extid=6a9ff159672dfbb41c95
> > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17cb0502600000
> > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14d5dc22600000
> > >
> > > Reported-by: syzbot+6a9ff159672dfbb41c95@syzkaller.appspotmail.com
> > > Fixes: 130b392c6cd6 ("net: tls: Add tls 1.3 support")
> > >
> > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection
> >
> > CC Herbert, linux-crypto
> >
> > This is got to be something in the crypto code :S
> >
> > The test case opens a ktls socket and back log writes to it.
> > Then it opens a AF_ALG socket, binds "pcrypt(gcm(aes))" and dies.
> >
> > The ktls socket upon close waits for async crypto callbacks, but they
> > never come. If I unset CRYPTO_USER_API_AEAD or change the alg to bind
> > to "gcm(aes)" the bug does not trigger.
> >
> > Any suggestions?
>
> Seeing as pcrypt is involved and this is a "task hung" bug, this is probably
> caused by the recursive pcrypt deadlock, which is yet to be fixed.
>
> See the original thread for more info:
>
> https://groups.google.com/forum/#!msg/syzkaller-bugs/1_CXUd3gBcg/BvsRLH0lAgAJ
>
> And the syzbot dashboard link:
>
> https://syzkaller.appspot.com/bug?id=178f2528d10720d563091fb51dceb4cb20f75525
>
> Let's tell syzbot this is a duplicate:
>
> #syz dup: INFO: task hung in aead_recvmsg
Thanks for the suggestion Eric!
Looks like the dup didn't tickle syzbot the right way. Let me retry
sending this directly to the original report.
next prev parent reply other threads:[~2019-08-19 21:13 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-15 10:54 INFO: task hung in tls_sw_release_resources_tx syzbot
2019-08-15 18:06 ` syzbot
2019-08-17 2:02 ` Jakub Kicinski
2019-08-17 5:47 ` Eric Biggers
2019-08-19 21:12 ` Jakub Kicinski [this message]
2019-08-19 21:35 ` Jakub Kicinski
2019-08-21 6:37 ` Steffen Klassert
[not found] <20190815141419.15036-1-hdanton@sina.com>
2019-08-16 1:11 ` Jakub Kicinski
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