linux-kernel - Re: WARNING: kernel stack frame pointer has bad value

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CACT4Y+ZX0mkUx4bKJGH2+TDmL0JSbgLCYhZX2nNqkeyBEx3bXQ@mail.gmail.com>
Date:   Thu, 19 Apr 2018 19:28:52 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+37035ccfa9a0a017ffcf@...kaller.appspotmail.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        David Miller <davem@...emloft.net>,
        linux-crypto@...r.kernel.org, Eric Biggers <ebiggers3@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: WARNING: kernel stack frame pointer has bad value

On Thu, Apr 19, 2018 at 5:57 PM, syzbot
<syzbot+37035ccfa9a0a017ffcf@...kaller.appspotmail.com> wrote:
> Hello,
>
> syzbot hit the following crash on upstream commit
> 48023102b7078a6674516b1fe0d639669336049d (Fri Apr 13 23:55:41 2018 +0000)
> Merge branch 'overlayfs-linus' of
> git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
> syzbot dashboard link:
> https://syzkaller.appspot.com/bug?extid=37035ccfa9a0a017ffcf
>
> So far this crash happened 141 times on net-next, upstream.
> C reproducer: https://syzkaller.appspot.com/x/repro.c?id=5871698234572800
> syzkaller reproducer:
> https://syzkaller.appspot.com/x/repro.syz?id=5086177975599104
> Raw console output:
> https://syzkaller.appspot.com/x/log.txt?id=5110926181138432
> Kernel config:
> https://syzkaller.appspot.com/x/.config?id=-8852471259444315113
> compiler: gcc (GCC) 8.0.1 20180413 (experimental)

This seems to be related to keccakf_rndc, please see the "Raw console
output" link.
+crypto maintainers

> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+37035ccfa9a0a017ffcf@...kaller.appspotmail.com
> It will help syzbot understand when the bug is fixed. See footer for
> details.
> If you forward the report, please keep this part and the footer.
>
> 00000000ed8ccbe7: 0000000000440169 (0x440169)
> 00000000469f2a79: 0000000000000033 (0x33)
> 000000004636639d: 0000000000000246 (0x246)
> 00000000aa65aef8: 00007ffead676158 (0x7ffead676158)
> 00000000e3ef297c: 000000000000002b (0x2b)
> WARNING: kernel stack frame pointer at 000000004832711f in
> syzkaller561281:4479 has bad value 000000006b4f8502
> WARNING: kernel stack regs at 0000000089e11b3b in syzkaller561281:4479 has
> bad 'bp' value 00000000f19a2a3b
> random: crng init done
>
>
> ---
> This bug is generated by a dumb bot. It may contain errors.
> See https://goo.gl/tpsmEJ for details.
> Direct all questions to syzkaller@...glegroups.com.
>
> syzbot will keep track of this bug report.
> If you forgot to add the Reported-by tag, once the fix for this bug is
> merged
> into any tree, please reply to this email with:
> #syz fix: exact-commit-title
> If you want to test a patch for this bug, please reply with:
> #syz test: git://repo/address.git branch
> and provide the patch inline or as an attachment.
> To mark this as a duplicate of another syzbot report, please reply with:
> #syz dup: exact-subject-of-another-report
> If it's a one-off invalid bug report, please reply with:
> #syz invalid
> Note: if the crash happens again, it will cause creation of a new bug
> report.
> Note: all commands must start from beginning of the line in the email body.