Seeing intermittent crash for TLSv1.3

[Hubert Kario]

Try using --malloc-fill=af --free-fill=fa ?
(or some other non-zero values)

On Tuesday, 23 April 2024 03:18:58 CEST, Rahul Shukla wrote:
> Hi Hubert,
> Thanks for the quick reply.I believe RAM is fine. We have other 
> machines as well where we can see this issue. We tried on 
> windows today and now we are consistently seeing this crash 
> there. 
> The only problem is that we are not able to see this crash when 
> we are running our debug modules with Purify or Valgrind. So no 
> clue what is causing it.
>
>
> --Rahul
>
>
>
> On Mon, Apr 22, 2024 at 11:02 PM Hubert Kario <hkario at redhat.com> wrote:
> Have you double-checked that the RAM in that PC is fine?
> Run memtest86+ for 24h, if possible.
>
> On Monday, 22 April 2024 18:27:51 CEST, Rahul Shukla wrote:
>> Hi All, 
>> I'm experiencing an intermittent crash with TLSv1.3. Despite my 
>> efforts to analyze it using Valgrind or Purify, I'm unable to 
>> replicate the issue. Does anyone have any insights into this??
>>
>>
>> #0  0x0000724208ea1743 in unlink_chunk 
>> (p=p at entry=0x7241ec4c9550, av=0x7241ec000030) at 
>> ./malloc/malloc.c:1634
>> #1  0x0000724208ea462b in _int_malloc 
>> (av=av at entry=0x7241ec000030, bytes=bytes at entry=80) at 
>> ./malloc/malloc.c:4307
>> #2  0x0000724208ea5139 in __GI___libc_malloc (bytes=80) at 
>> ./malloc/malloc.c:3329
>> #3  0x00005a11a31f06ce in CRYPTO_zalloc ()
>> #4  0x00005a11a318d321 in bn_expand2 ()
>> #5  0x00005a11a318feab in BN_lshift1 ()
>> #6  0x00005a11a32e0481 in BN_mod_lshift1_quick ()
>> #7  0x00005a11a31b5f35 in ossl_ec_GFp_simple_ladder_step ()
>> #8  0x00005a11a31ad34d in ossl_ec_scalar_mul_ladder ()
>> #9  0x00005a11a31addf1 in ossl_ec_wNAF_mul ()
>> #10 0x00005a11a31abc3d in EC_POINT_mul ()
>> #11 0x00005a11a31a8d7f in ossl_ec_key_simple_generate_key ()
>> #12 0x00005a11a31a8061 in ossl_ec_key_gen ()
>> #13 0x00005a11a31a7fce in EC_KEY_generate_key ()
>> #14 0x00005a11a3297b38 in ec_gen ()
>> #15 0x00005a11a31d6c2b in evp_keymgmt_util_gen ()
>> #16 0x00005a11a31e2aa7 in EVP_PKEY_generate ()
>> #17 0x00005a11a311a317 in ssl_generate_pkey_group ()
>> #18 0x00005a11a31462bc in tls_construct_ctos_key_share ()
>> #19 0x00005a11a31443c3 in tls_construct_extensions ()
>> #20 0x00005a11a314f92d in tls_construct_client_hello ()
>> #21 0x00005a11a314e667 in state_machine ()
>> #22 0x00005a11a3125184 in SSL_do_handshake ()
>> .....
>>
>>
>> TIA.
>>
>> -Rahul 
>

-- 
Regards,
Hubert Kario
Principal Quality Engineer, RHEL Crypto team
Web: www.cz.redhat.com
Red Hat Czech s.r.o., Purkyňova 115, 612 00, Brno, Czech Republic