Ok, I can fix the custom free to take care of this. But, why is this happening in openssl 1.0.1 and not in 1.0.0 or 0.9.8? Is there is a document or resource in the web that explains what is expected from the custom alloc, realloc and free routines?
Regards, Sudarshan On Fri, May 25, 2012 at 4:00 AM, Richard Levitte <rich...@levitte.org> wrote: > In message > <cagxgq09umap5b1bhsyjj54srwrg-syzqnodk5rh_gnt29xa...@mail.gmail.com> on Thu, > 24 May 2012 17:46:49 +0530, Sudarshan Raghavan > <sudarshan.t.ragha...@gmail.com> said: > > sudarshan.t.raghavan> Hi, > sudarshan.t.raghavan> > sudarshan.t.raghavan> I am using CRYPTO_set_mem_functions to use our own > custom memory > sudarshan.t.raghavan> routines in a non blocking proxy implementation. This > was working fine > sudarshan.t.raghavan> in 0.9.8 and 1.0.0 but with 1.0.1c I can see that the > custom free > sudarshan.t.raghavan> routine is being invoked with a NULL argument after > calling SSL_free > sudarshan.t.raghavan> and this results in the proxy crashing. > sudarshan.t.raghavan> > sudarshan.t.raghavan> #3 0x0828bd24 in CUSTOM_FREE (oldMem=0x0) at > custom_mem.c:340 > sudarshan.t.raghavan> #4 0xb75342b4 in CRYPTO_free () from > sudarshan.t.raghavan> > /home/product/code/firmware/current/lib/openssl1.0/lib/libcrypto.so.1.0.0 > sudarshan.t.raghavan> #5 0x00000000 in ?? () > sudarshan.t.raghavan> > sudarshan.t.raghavan> This happens every time the SSL connections is torn > down. If I don't > sudarshan.t.raghavan> use CRYPTO_set_mem_functions it works fine. I am > assuming the default > sudarshan.t.raghavan> free routine ignores a NULL argument. Is it an > expectation from the > sudarshan.t.raghavan> custom free routine to also ignore NULL? I can provide > more > sudarshan.t.raghavan> information if needed. Can someone help me debug this > problem. > sudarshan.t.raghavan> > sudarshan.t.raghavan> Thanks, > sudarshan.t.raghavan> Sudarshan > > Your assumption is correct, OpenSSL expects the same semantics as > malloc(), realloc() and free(), so you free() replacement must be able > to handle a NULL argument. > > Cheers, > Richard > > -- > Richard Levitte rich...@levitte.org > http://richard.levitte.org/ > > "Life is a tremendous celebration - and I'm invited!" > -- from a friend's blog, translated from Swedish ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
