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Re: Spiped 1.4.x segfaults on i386
I did that and got the following results:
(gdb) p key
$1 = (const uint8_t *) 0xbfa8a85c ""
(gdb) p rkeys
$2 = (__m128i *) 0x8a8b7c8
The complete output is in the attachment.
On Tue, Oct 7, 2014, at 09:41 PM, Colin Percival wrote:
> On 10/07/14 00:08, Denis Krienb�hl wrote:
> > I followed your steps and got the following results after running
> > addr2line:
> >
> > /opt/spiped/1.4.1/spiped/../libcperciva/crypto/crypto_aes_aesni.c:52
>
> Hmm, interesting! Ok, next step:
>
> 1. Build again with `make CFLAGS="-O0 -g"`.
> 2. Run the utility and watch it crash.
> 3. Run `gdb ./spiped/spiped spiped.core` and at the prompt "p key" and
> "p rkeys".
>
> If gdb complains that spiped.core doesn't exist you'll need to enable
> core dumps -- I'm not sure if Ubuntu has them turned on by default.
>
> I *think* I know what the problem is here, but seeing the value of those
> two pointers when the crash occurs should confirm it.
>
> --
> Colin Percival
> Security Officer Emeritus, FreeBSD | The power to serve
> Founder, Tarsnap | www.tarsnap.com | Online backups for the truly
> paranoid
>
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Reading symbols from /opt/spiped/1.4.1/spiped/spiped...done.
[New LWP 23043]
[New LWP 23044]
warning: Can't read pathname for load map: Input/output error.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
Core was generated by `spiped/spiped -e -s [127.0.0.1]:1234 -t server.example.org:1234 -k /var/spipe'.
Program terminated with signal 11, Segmentation fault.
#0 0x08054cba in crypto_aes_key_expand_128_aesni (key=0xbfa8a85c "", rkeys=0x8a8b7c8)
at ../libcperciva/crypto/crypto_aes_aesni.c:52
52 rkeys[0] = _mm_loadu_si128((const __m128i *)&key[0]);
(gdb) p key
$1 = (const uint8_t *) 0xbfa8a85c ""
(gdb) p rkeys
$2 = (__m128i *) 0x8a8b7c8