From: Eric Biggers <ebiggers@kernel.org>
To: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Jakub Kicinski <jakub.kicinski@netronome.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: Fri, 16 Aug 2019 22:47:43 -0700 [thread overview]
Message-ID: <20190817054743.GE8209@sol.localdomain> (raw)
In-Reply-To: <20190816190234.2aaab5b6@cakuba.netronome.com>
[+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
Steffen, do you have any plan to fix this?
- Eric
next prev parent reply other threads:[~2019-08-17 5:49 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 [this message]
2019-08-19 21:12 ` Jakub Kicinski
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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