I enabled debug symbols in openssl and this is what I am seeing
#3 0x0828bd74 in CUSTOM_FREE (oldMem=0x0) at ssl_mem.c:34 #4 0xb758e160 in CRYPTO_free (str=0x0) at mem.c:397 #5 0xb773520c in SSL_SRP_CTX_free (s=0xb3e4f300) at tls_srp.c:102 #6 0xb77091c0 in ssl3_free (s=0xb3e4f300) at s3_lib.c:2995 #7 0xb7712486 in tls1_free (s=0xb3e4f300) at t1_lib.c:165 #8 0xb77265f2 in SSL_free (s=0xb3e4f300) at ssl_lib.c:586 tls_srp.c :102 is this OPENSSL_free(s->srp_ctx.login); Regards, Sudarshan On Thu, May 24, 2012 at 7:23 PM, Dr. Stephen Henson <st...@openssl.org> wrote: > On Thu, May 24, 2012, Sudarshan Raghavan wrote: > >> Hi, >> >> I am using CRYPTO_set_mem_functions to use our own custom memory >> routines in a non blocking proxy implementation. This was working fine >> in 0.9.8 and 1.0.0 but with 1.0.1c I can see that the custom free >> routine is being invoked with a NULL argument after calling SSL_free >> and this results in the proxy crashing. >> >> #3 0x0828bd24 in CUSTOM_FREE (oldMem=0x0) at custom_mem.c:340 >> #4 0xb75342b4 in CRYPTO_free () from >> /home/product/code/firmware/current/lib/openssl1.0/lib/libcrypto.so.1.0.0 >> #5 0x00000000 in ?? () >> >> This happens every time the SSL connections is torn down. If I don't >> use CRYPTO_set_mem_functions it works fine. I am assuming the default >> free routine ignores a NULL argument. Is it an expectation from the >> custom free routine to also ignore NULL? I can provide more >> information if needed. Can someone help me debug this problem. >> > > Well you need to compile OpenSSL with debugging symbols and find precisely > where this is happening with a stack trace. OpenSSL shoudln't be attempting to > free a NULL so this is a bug which should be fixed. > > Steve. > -- > Dr Stephen N. Henson. OpenSSL project core developer. > Commercial tech support now available see: http://www.openssl.org > ______________________________________________________________________ > OpenSSL Project http://www.openssl.org > User Support Mailing List openssl-users@openssl.org > Automated List Manager majord...@openssl.org ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
