From: Eric Biggers <ebiggers3@gmail.com>
To: syzbot
<bot+428944d1a848e9d7464aa96da32ba353cc812457@syzkaller.appspotmail.com>
Cc: davem@davemloft.net, herbert@gondor.apana.org.au,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: BUG: unable to handle kernel paging request in hmac_init_tfm
Date: Tue, 30 Jan 2018 13:41:41 -0800 [thread overview]
Message-ID: <20180130214141.hape34mekd54yedw@gmail.com> (raw)
In-Reply-To: <94eb2c0d010ad8f1660560a275fd@google.com>
On Mon, Dec 18, 2017 at 11:36:01AM -0800, syzbot wrote:
> Hello,
>
> syzkaller hit the following crash on
> 6084b576dca2e898f5c101baef151f7bfdbb606d
> git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
> compiler: gcc (GCC) 7.1.1 20170620
> .config is attached
> Raw console output is attached.
>
> Unfortunately, I don't have any reproducer for this bug yet.
>
>
> BUG: unable to handle kernel paging request at ffff8802dca4f748
> IP: hmac_init_tfm+0x5d/0x90 crypto/hmac.c:169
> PGD 404e067 P4D 404e067 PUD 0
> Oops: 0002 [#1] SMP
> Dumping ftrace buffer:
> (ftrace buffer empty)
> Modules linked in:
> CPU: 1 PID: 6418 Comm: syz-executor5 Not tainted 4.15.0-rc3-next-20171214+
> #67
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> RIP: 0010:hmac_init_tfm+0x5d/0x90 crypto/hmac.c:169
> RSP: 0018:ffffc90000f77df8 EFLAGS: 00010202
> RAX: 0000000000000068 RBX: ffff8801dca52308 RCX: ffffffff816847d3
> RDX: 00000000000005d6 RSI: ffffc90004d7e000 RDI: ffff8802143cc708
> RBP: ffffc90000f77e10 R08: 000000000002bcf8 R09: ffff8802143cc700
> R10: 0000000000000000 R11: 0000000000000000 R12: ffff8802143cc700
> R13: ffff8802dca4f748 R14: ffff8801e0a96c50 R15: ffffc90000f77ed0
> FS: 00007fecf7c1a700(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffff8802dca4f748 CR3: 00000001e47f4000 CR4: 00000000001406e0
> DR0: 0000000020000008 DR1: 0000000020000008 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
> Call Trace:
> crypto_create_tfm+0xb4/0x120 crypto/api.c:466
> crypto_alloc_tfm+0x82/0x180 crypto/api.c:540
> crypto_alloc_shash+0x2c/0x40 crypto/shash.c:436
> sctp_listen_start net/sctp/socket.c:7496 [inline]
> sctp_inet_listen+0x1c1/0x240 net/sctp/socket.c:7584
> SYSC_listen net/socket.c:1483 [inline]
> SyS_listen+0x71/0xb0 net/socket.c:1469
> entry_SYSCALL_64_fastpath+0x1f/0x96
> RIP: 0033:0x452a39
> RSP: 002b:00007fecf7c19c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000032
> RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452a39
> RDX: 0000000000000000 RSI: 0000000000000ae0 RDI: 000000000000001b
> RBP: 00000000000000e8 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ef660
> R13: 00000000ffffffff R14: 00007fecf7c1a6d4 R15: 0000000000000000
> Code: ff 01 c0 4c 8d 6c 02 07 e8 a1 22 ff ff 49 83 e5 f8 48 3d 00 f0 ff ff
> 49 89 c4 77 25 e8 6d 5b c3 ff 41 8b 04 24 83 c0 10 89 43 f8 <4d> 89 65 00 45
> 31 e4 e8 57 5b c3 ff 44 89 e0 5b 41 5c 41 5d 5d
> RIP: hmac_init_tfm+0x5d/0x90 crypto/hmac.c:169 RSP: ffffc90000f77df8
> CR2: ffff8802dca4f748
> ---[ end trace ec6d3df7509d0a3b ]---
> Kernel panic - not syncing: Fatal exception
> Dumping ftrace buffer:
> (ftrace buffer empty)
> Kernel Offset: disabled
> Rebooting in 86400 seconds..
Invalidating this bug since it hasn't been seen again, and it was reported while
KASAN was accidentally disabled in the syzbot config due to a change to the
kconfig menus in linux-next (so this crash was probably caused by slab
corruption elsewhere).
#syz invalid
prev parent reply other threads:[~2018-01-30 21:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <94eb2c0d010ad8f1660560a275fd@google.com>
2017-12-20 23:09 ` BUG: unable to handle kernel paging request in hmac_init_tfm Eric Biggers
2017-12-21 7:44 ` Dmitry Vyukov
2017-12-22 2:27 ` Eric Biggers
2017-12-22 9:01 ` Dmitry Vyukov
2017-12-20 23:42 ` Eric Biggers
2018-01-30 21:41 ` Eric Biggers [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180130214141.hape34mekd54yedw@gmail.com \
--to=ebiggers3@gmail.com \
--cc=bot+428944d1a848e9d7464aa96da32ba353cc812457@syzkaller.appspotmail.com \
--cc=davem@davemloft.net \
--cc=herbert@gondor.apana.org.au \
--cc=linux-crypto@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.