In message <[EMAIL PROTECTED]> on Tue, 20 Jan 2004 21:19:03 +0000, [EMAIL PROTECTED] said:
kjfw> I posted over a month ago about an "Unexpected Signal: 11" in kjfw> MD5_Init. The same error has happened again, but this time I kjfw> have a bit more information: MD5_Init was called with a null kjfw> pointer (c == 0), hence the seg fault. However, no calls to kjfw> CRYPTO_malloc (or similar functions including OPENSSL_malloc kjfw> functions) failed, so this is not an out-of-memory problem. kjfw> Thus, given that we're using OpenSSL in non-blocking mode in a kjfw> multi-threaded environment and the extremely infrequent nature kjfw> of this bug, my best guess is that this is some very obscure kjfw> timing issue whereby MD5_Init is being called before the kjfw> relevant data structures have been fulling initialized. kjfw> kjfw> So does anybody have any idea how this might happen? Any kjfw> suggestions on how I might further track the problem down? I'm kjfw> planning on adding some printfs to EVP_DigestInit_ex to print kjfw> some additional contextual info if ctx->digest->init is called kjfw> with ctx->md_data == null. So, the context that's passed to EVP_DigestInit_ex(), is it reused? Have you cleaned up properly? You see, the only reason I can see for MD5_init to be called with c == 0 is if ctx->digest (in EVP_DigestInit_ex()) is the same as type. kjfw> Again, we've only seen this problem on our production stack: kjfw> kjfw> OpenSSL 0.9.7b 10 Apr 2003 And what other versions have you tested with in similar environments? The answer to that might give us clues to what exactly happens... ----- Please consider sponsoring my work on free software. See http://www.free.lp.se/sponsoring.html for details. You don't have to be rich, a $10 donation is appreciated! -- Richard Levitte \ Tunnlandsvägen 3 \ [EMAIL PROTECTED] [EMAIL PROTECTED] \ S-168 36 BROMMA \ T: +46-8-26 52 47 \ SWEDEN \ or +46-708-26 53 44 Procurator Odiosus Ex Infernis -- [EMAIL PROTECTED] Member of the OpenSSL development team: http://www.openssl.org/ Unsolicited commercial email is subject to an archival fee of $400. See <http://www.stacken.kth.se/~levitte/mail/> for more info. ______________________________________________________________________ OpenSSL Project http://www.openssl.org Development Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
