On Tue, Feb 19, 2019 at 08:44:00AM +0100, Daniel Stenberg wrote: > In an attempt to reproduce this, here's me on Linux 4.19, glibc 2.28, gcc > 8.2.0, valgrind 3.14.0, openssl 1.1.1a on Debian unstable.
I suppose it's worth noting - I'm using valgrind 3.14 as well and openssl 1.0.2q > Can you rerun configure with '--enable-debug' to get debug symbols on the > library and then rerun the experiment to get more details on the backtrace > for > where exactly in the code valgrind finds the problems? After reconfiguring wtih '--disabled-shared' and '--enable-debug', a lot of the errors seem to be related to calls to nghttp2 (I'm using version 1.33.0) and glibc, others within curl itself. Some examples: $ valgrind --leak-check=full ./src/curl https://example.com ... ==19114== Conditional jump or move depends on uninitialised value(s) ==19114== at 0x18AE57: readwrite_data (transfer.c:870) ==19114== by 0x18BB7F: Curl_readwrite (transfer.c:1296) ==19114== by 0x145813: multi_runsingle (multi.c:1918) ==19114== by 0x1461A7: curl_multi_perform (multi.c:2205) ==19114== by 0x13D832: easy_transfer (easy.c:713) ==19114== by 0x13DAB1: easy_perform (easy.c:807) ==19114== by 0x13DB18: curl_easy_perform (easy.c:826) ==19114== by 0x130180: operate_do (tool_operate.c:1579) ==19114== by 0x1315D4: operate (tool_operate.c:2082) ==19114== by 0x129A4B: main (tool_main.c:326) ... ==19114== Use of uninitialised value of size 8 ==19114== at 0x4E51D65: nghttp2_rcbuf_decref (in /usr/lib64/libnghttp2.so.14.17.0) ==19114== by 0x4E4D987: hd_ringbuf_free (in /usr/lib64/libnghttp2.so.14.17.0) ==19114== by 0x4E44529: nghttp2_session_del (in /usr/lib64/libnghttp2.so.14.17.0) ==19114== by 0x14FF9B: http2_disconnect (http2.c:167) ==19114== by 0x17C846: Curl_disconnect (url.c:789) ==19114== by 0x14F285: Curl_conncache_close_all_connections (conncache.c:577) ==19114== by 0x1463E5: curl_multi_cleanup (multi.c:2278) ==19114== by 0x17B56F: Curl_close (url.c:337) ==19114== by 0x13DB8C: curl_easy_cleanup (easy.c:853) ==19114== by 0x129970: main_free (tool_main.c:217) ==19114== by 0x129A5A: main (tool_main.c:334) ==19114== ==19114== ==19114== HEAP SUMMARY: ==19114== in use at exit: 1,696 bytes in 50 blocks ==19114== total heap usage: 32,216 allocs, 32,166 frees, 3,051,031 bytes allocated ==19114== ==19114== LEAK SUMMARY: ==19114== definitely lost: 0 bytes in 0 blocks ==19114== indirectly lost: 0 bytes in 0 blocks ==19114== possibly lost: 0 bytes in 0 blocks ==19114== still reachable: 1,696 bytes in 50 blocks ==19114== suppressed: 0 bytes in 0 blocks ==19114== Reachable blocks (those to which a pointer was found) are not shown. ==19114== To see them, rerun with: --leak-check=full --show-leak-kinds=all ==19114== ==19114== For counts of detected and suppressed errors, rerun with: -v ==19114== Use --track-origins=yes to see where uninitialised values come from ==19114== ERROR SUMMARY: 2493 errors from 396 contexts (suppressed: 0 from 0) Re-configuring/re-compiling with '--without-nghttp2', nghttp2 errors are unsurprisingly absent from the valgrind output, but I'm still getting a lot of errors and the same leak summary: ==3070== HEAP SUMMARY: ==3070== in use at exit: 1,696 bytes in 50 blocks ==3070== total heap usage: 32,155 allocs, 32,105 frees, 2,823,956 bytes allocated ==3070== ==3070== LEAK SUMMARY: ==3070== definitely lost: 0 bytes in 0 blocks ==3070== indirectly lost: 0 bytes in 0 blocks ==3070== possibly lost: 0 bytes in 0 blocks ==3070== still reachable: 1,696 bytes in 50 blocks ==3070== suppressed: 0 bytes in 0 blocks ==3070== Reachable blocks (those to which a pointer was found) are not shown. ==3070== To see them, rerun with: --leak-check=full --show-leak-kinds=all ==3070== ==3070== For counts of detected and suppressed errors, rerun with: -v ==3070== Use --track-origins=yes to see where uninitialised values come from ==3070== ERROR SUMMARY: 5704 errors from 322 contexts (suppressed: 0 from 0)
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