Greetings openssl-users, We had several segmentation faults, all starting from SHA1_Update() call. See [1], [2] and [3]. Some details: We are using libcurl to send HTTPS requests to Amazon S3 service. We are using "curl_multi" handles to submit and track these HTTPS requests. The problem happens on a virtual machine running Ubuntu Precise 12.04 distribution, but with a different kernel (mainline 3.8.13). Versions of relevant user-space packages are below: ii libgcrypt11 1.5.0-3ubuntu0.4 LGPL Crypto library - runtime library ii libgcrypt11-dev 1.5.0-3ubuntu0.4 LGPL Crypto library - development files ii libhcrypto4-heimdal 1.6~git20120311.dfsg.1-2 Heimdal Kerberos - crypto library ii libk5crypto3 1.10+dfsg~beta1-2ubuntu0.6 MIT Kerberos runtime libraries - Crypto Library ii libgnutls-openssl27 2.12.14-5ubuntu3.9 GNU TLS library - OpenSSL wrapper ii libssl-dev 1.0.1-4ubuntu5.31 SSL development libraries, header files and documentation ii libssl1.0.0 1.0.1-4ubuntu5.31 SSL shared libraries ii libsslcommon2 0.14-2 enterprise messaging system - common SSL libraries ii openssl 1.0.1-4ubuntu5.31 Secure Socket Layer (SSL) binary and related cryptographic tools ii python-openssl 0.12-1ubuntu2 Python wrapper around the OpenSSL library We do not have a reliable reproducer for this issue. It happened once in our lab, and three more times in the field, all during about 6 months that we started using libcurl. Is anybody perhaps familiar with such issue or can give a recommendation of how to proceed? Thanks, Alex. [1] #0 0x00007f6b82cb14d0 in ?? () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 #1 0xca62c1d6ca62c1d6 in ?? () #2 0xca62c1d6ca62c1d6 in ?? () #3 0xca62c1d6ca62c1d6 in ?? () #4 0xca62c1d6ca62c1d6 in ?? () #5 0xca62c1d6ca62c1d6 in ?? () #6 0xca62c1d6ca62c1d6 in ?? () #7 0xca62c1d6ca62c1d6 in ?? () #8 0xca62c1d6ca62c1d6 in ?? () #9 0x00007f6b8301c929 in ?? () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 #10 0x00007f6b341e8b30 in ?? () #11 0x0000000000000016 in ?? () #12 0x00007f6b82cad900 in SHA1_Update () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 #13 0x00007f6b82d2fe0f in RAND_load_file () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 #14 0x00007f6b85488a85 in curl_multi_perform () from /usr/lib/x86_64-linux-gnu/libcurl.so.4 #15 0x00000000007248db in __engine_run_requests (eng=0x7f6b54154310) at common/lib/zobjstore_access.c:1816 #16 0x0000000000722b9b in engine_loop (arg=0x7f6b54154310) at common/lib/zobjstore_access.c:1534 #17 0x00000000007101b9 in zthread_start_routine (arg=0x7f6b54154330) at common/lib/zthread.c:118 #18 0x00007f6b85033e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #19 0x00007f6b8311338d in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6 #20 0x0000000000000000 in ?? () [2] #0 0x00007f4a322284d0 in ?? () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 #1 0xca62c1d6ca62c1d6 in ?? () #2 0xca62c1d6ca62c1d6 in ?? () #3 0xca62c1d6ca62c1d6 in ?? () #4 0xca62c1d6ca62c1d6 in ?? () #5 0xca62c1d6ca62c1d6 in ?? () #6 0xca62c1d6ca62c1d6 in ?? () #7 0xca62c1d6ca62c1d6 in ?? () #8 0xca62c1d6ca62c1d6 in ?? () #9 0x00007f4a3259392a in ?? () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 #10 0x00007f49e50988b0 in ?? () #11 0x0000000000000015 in ?? () #12 0x00007f4a32224900 in SHA1_Update () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 #13 0x00007f4a322a6e0f in ?? () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 #14 0x00007f4a31519a05 in ?? () from /lib/x86_64-linux-gnu/libssl.so.1.0.0 #15 0x00007f4a3150f712 in ?? () from /lib/x86_64-linux-gnu/libssl.so.1.0.0 #16 0x00007f4a3150fb04 in ?? () from /lib/x86_64-linux-gnu/libssl.so.1.0.0 #17 0x00007f4a34a1998e in ossl_send () from /usr/lib/x86_64-linux-gnu/libcurl.so.4 #18 0x00007f4a349e38c2 in Curl_write () from /usr/lib/x86_64-linux-gnu/libcurl.so.4 #19 0x00007f4a349f9a3f in Curl_readwrite () from /usr/lib/x86_64-linux-gnu/libcurl.so.4 #20 0x00007f4a34a01ebc in multi_runsingle () from /usr/lib/x86_64-linux-gnu/libcurl.so.4 #21 0x00007f4a34a02c55 in curl_multi_perform () from /usr/lib/x86_64-linux-gnu/libcurl.so.4 [3] #0 0x00007f4acc7af4d6 in ?? () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 #1 0xca62c1d6ca62c1d6 in ?? () #2 0xca62c1d6ca62c1d6 in ?? () #3 0xca62c1d6ca62c1d6 in ?? () #4 0xca62c1d6ca62c1d6 in ?? () #5 0xca62c1d6ca62c1d6 in ?? () #6 0xca62c1d6ca62c1d6 in ?? () #7 0xca62c1d6ca62c1d6 in ?? () #8 0xca62c1d6ca62c1d6 in ?? () #9 0x00007f4accb1a920 in ?? () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 #10 0x00007f4aa00ff5b0 in ?? () #11 0x000000000000001f in ?? () #12 0x00007f4acc7ab900 in SHA1_Update () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 #13 0x00007f4acc82de0f in ?? () from /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 #14 0x00007f4acbaa0a05 in ?? () from /lib/x86_64-linux-gnu/libssl.so.1.0.0 #15 0x00007f4acba96712 in ?? () from /lib/x86_64-linux-gnu/libssl.so.1.0.0 #16 0x00007f4acba96b04 in ?? () from /lib/x86_64-linux-gnu/libssl.so.1.0.0 #17 0x00007f4acefa098e in ossl_send () from /usr/lib/x86_64-linux-gnu/libcurl.so.4 #18 0x00007f4acef6a8c2 in Curl_write () from /usr/lib/x86_64-linux-gnu/libcurl.so.4 #19 0x00007f4acef66e69 in Curl_add_buffer_send () from /usr/lib/x86_64-linux-gnu/libcurl.so.4 #20 0x00007f4acef68dc9 in Curl_http () from /usr/lib/x86_64-linux-gnu/libcurl.so.4 #21 0x00007f4acef7a56b in Curl_do () from /usr/lib/x86_64-linux-gnu/libcurl.so.4 #22 0x00007f4acef89501 in multi_runsingle () from /usr/lib/x86_64-linux-gnu/libcurl.so.4 #23 0x00007f4acef89c55 in curl_multi_perform () from /usr/lib/x86_64-linux-gnu/libcurl.so.4
