Hi,
I have multithreaded test programs (client and server) that I use to test
some functionalities build with OpenSSL.
They started to warn about memory leaks when I linked them with version 1.1.
As I had to do some code changes to adapt the new version, I first thought I
forget some [new] init/free code.
I finally used OPENSSL_cleanup() and alikes instead of the previous litany
calls ;-), but still encounters leaks.
As it was hard to track them down, I write a simple server test program that
wait for a client and then return without even receiving data.
No certificate are loaded.
Leaks are detected only when a client handshake with the server.
I might be wrong, but I do not think this is a false positive.
Could you please have a look at the informations below and share your
feelings ?
Regards,
Michel.
Windows _CrtDumpMemoryLeaks() output :
Detected memory leaks!
Dumping objects ->
{4697} normal block at 0x00822660, 140 bytes long.
Data: < > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
{4696} normal block at 0x00822608, 24 bytes long.
Data: < > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
{4695} normal block at 0x008225B0, 24 bytes long.
Data: < > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
{4694} normal block at 0x00822558, 24 bytes long.
Data: < > 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
{4693} normal block at 0x00822488, 148 bytes long.
Data: < & X% % > 00 00 00 00 08 26 82 00 58 25 82 00 B0 25 82 00
Object dump complete.
WARNING: Visual Leak Detector detected memory leaks!
---------- Block 4677 at 0x00822488: 148 bytes ----------
Leak Hash: 0x76FECFA5, Count: 1, Total 148 bytes
Call Stack (TID 2904):
ntdll.dll!RtlAllocateHeap()
f:\dd\vctools\crt\crtw32\misc\dbgmalloc.c (56): TestsTLS-11.exe!malloc()
+ 0x15 bytes
e:\openssl-1.1.git\crypto\mem.c (138): TestsTLS-11.exe!CRYPTO_malloc() +
0x9 bytes
e:\openssl-1.1.git\crypto\mem.c (158): TestsTLS-11.exe!CRYPTO_zalloc() +
0x11 bytes
e:\openssl-1.1.git\crypto\hmac\hmac.c (174):
TestsTLS-11.exe!HMAC_CTX_new() + 0xE bytes
e:\openssl-1.1.git\ssl\t1_lib.c (3060):
TestsTLS-11.exe!tls_decrypt_ticket() + 0x5 bytes
e:\openssl-1.1.git\ssl\t1_lib.c (2994):
TestsTLS-11.exe!tls_check_serverhello_tlsext_early() + 0x2F bytes
e:\openssl-1.1.git\ssl\ssl_sess.c (536):
TestsTLS-11.exe!ssl_get_prev_session() + 0x18 bytes
e:\openssl-1.1.git\ssl\statem\statem_srvr.c (1181):
TestsTLS-11.exe!tls_process_client_hello() + 0x11 bytes
e:\openssl-1.1.git\ssl\statem\statem_srvr.c (804):
TestsTLS-11.exe!ossl_statem_server_process_message() + 0xD bytes
e:\openssl-1.1.git\ssl\statem\statem.c (609):
TestsTLS-11.exe!read_state_machine() + 0xB bytes
e:\openssl-1.1.git\ssl\statem\statem.c (429):
TestsTLS-11.exe!state_machine() + 0x9 bytes
e:\openssl-1.1.git\ssl\statem\statem.c (222):
TestsTLS-11.exe!ossl_statem_accept() + 0xB bytes
e:\openssl-1.1.git\ssl\ssl_lib.c (2908):
TestsTLS-11.exe!SSL_do_handshake() + 0xC bytes
p:\mes programmes\shared\ocrypto-11\tls.cpp (1017):
TestsTLS-11.exe!OTLS::TLSSss::DoHandshake() + 0xC bytes
p:\mes programmes\tests\_testsshared\teststls-11-leak -
copie\testtls.cpp (202): TestsTLS-11.exe!main() + 0xB bytes
f:\dd\vctools\crt\crtw32\startup\crt0.c (165):
TestsTLS-11.exe!mainCRTStartup()
---------- Block 4678 at 0x00822558: 24 bytes ----------
Leak Hash: 0xEBA79111, Count: 1, Total 24 bytes
Call Stack (TID 2904):
ntdll.dll!RtlAllocateHeap()
f:\dd\vctools\crt\crtw32\misc\dbgmalloc.c (56): TestsTLS-11.exe!malloc()
+ 0x15 bytes
e:\openssl-1.1.git\crypto\mem.c (138): TestsTLS-11.exe!CRYPTO_malloc() +
0x9 bytes
e:\openssl-1.1.git\crypto\mem.c (158): TestsTLS-11.exe!CRYPTO_zalloc() +
0x11 bytes
e:\openssl-1.1.git\crypto\evp\digest.c (154):
TestsTLS-11.exe!EVP_MD_CTX_new() + 0xB bytes
e:\openssl-1.1.git\crypto\hmac\hmac.c (210):
TestsTLS-11.exe!HMAC_CTX_reset() + 0x5 bytes
e:\openssl-1.1.git\crypto\hmac\hmac.c (177):
TestsTLS-11.exe!HMAC_CTX_new() + 0x9 bytes
e:\openssl-1.1.git\ssl\t1_lib.c (3060):
TestsTLS-11.exe!tls_decrypt_ticket() + 0x5 bytes
e:\openssl-1.1.git\ssl\t1_lib.c (2994):
TestsTLS-11.exe!tls_check_serverhello_tlsext_early() + 0x2F bytes
e:\openssl-1.1.git\ssl\ssl_sess.c (536):
TestsTLS-11.exe!ssl_get_prev_session() + 0x18 bytes
e:\openssl-1.1.git\ssl\statem\statem_srvr.c (1181):
TestsTLS-11.exe!tls_process_client_hello() + 0x11 bytes
e:\openssl-1.1.git\ssl\statem\statem_srvr.c (804):
TestsTLS-11.exe!ossl_statem_server_process_message() + 0xD bytes
e:\openssl-1.1.git\ssl\statem\statem.c (609):
TestsTLS-11.exe!read_state_machine() + 0xB bytes
e:\openssl-1.1.git\ssl\statem\statem.c (429):
TestsTLS-11.exe!state_machine() + 0x9 bytes
e:\openssl-1.1.git\ssl\statem\statem.c (222):
TestsTLS-11.exe!ossl_statem_accept() + 0xB bytes
e:\openssl-1.1.git\ssl\ssl_lib.c (2908):
TestsTLS-11.exe!SSL_do_handshake() + 0xC bytes
p:\mes programmes\shared\ocrypto-11\tls.cpp (1017):
TestsTLS-11.exe!OTLS::TLSSss::DoHandshake() + 0xC bytes
p:\mes programmes\tests\_testsshared\teststls-11-leak -
copie\testtls.cpp (202): TestsTLS-11.exe!main() + 0xB bytes
f:\dd\vctools\crt\crtw32\startup\crt0.c (165):
TestsTLS-11.exe!mainCRTStartup()
---------- Block 4679 at 0x008225B0: 24 bytes ----------
Leak Hash: 0x6479AA48, Count: 1, Total 24 bytes
Call Stack (TID 2904):
ntdll.dll!RtlAllocateHeap()
f:\dd\vctools\crt\crtw32\misc\dbgmalloc.c (56): TestsTLS-11.exe!malloc()
+ 0x15 bytes
e:\openssl-1.1.git\crypto\mem.c (138): TestsTLS-11.exe!CRYPTO_malloc() +
0x9 bytes
e:\openssl-1.1.git\crypto\mem.c (158): TestsTLS-11.exe!CRYPTO_zalloc() +
0x11 bytes
e:\openssl-1.1.git\crypto\evp\digest.c (154):
TestsTLS-11.exe!EVP_MD_CTX_new() + 0xB bytes
e:\openssl-1.1.git\crypto\hmac\hmac.c (214):
TestsTLS-11.exe!HMAC_CTX_reset() + 0x5 bytes
e:\openssl-1.1.git\crypto\hmac\hmac.c (177):
TestsTLS-11.exe!HMAC_CTX_new() + 0x9 bytes
e:\openssl-1.1.git\ssl\t1_lib.c (3060):
TestsTLS-11.exe!tls_decrypt_ticket() + 0x5 bytes
e:\openssl-1.1.git\ssl\t1_lib.c (2994):
TestsTLS-11.exe!tls_check_serverhello_tlsext_early() + 0x2F bytes
e:\openssl-1.1.git\ssl\ssl_sess.c (536):
TestsTLS-11.exe!ssl_get_prev_session() + 0x18 bytes
e:\openssl-1.1.git\ssl\statem\statem_srvr.c (1181):
TestsTLS-11.exe!tls_process_client_hello() + 0x11 bytes
e:\openssl-1.1.git\ssl\statem\statem_srvr.c (804):
TestsTLS-11.exe!ossl_statem_server_process_message() + 0xD bytes
e:\openssl-1.1.git\ssl\statem\statem.c (609):
TestsTLS-11.exe!read_state_machine() + 0xB bytes
e:\openssl-1.1.git\ssl\statem\statem.c (429):
TestsTLS-11.exe!state_machine() + 0x9 bytes
e:\openssl-1.1.git\ssl\statem\statem.c (222):
TestsTLS-11.exe!ossl_statem_accept() + 0xB bytes
e:\openssl-1.1.git\ssl\ssl_lib.c (2908):
TestsTLS-11.exe!SSL_do_handshake() + 0xC bytes
p:\mes programmes\shared\ocrypto-11\tls.cpp (1017):
TestsTLS-11.exe!OTLS::TLSSss::DoHandshake() + 0xC bytes
p:\mes programmes\tests\_testsshared\teststls-11-leak -
copie\testtls.cpp (202): TestsTLS-11.exe!main() + 0xB bytes
f:\dd\vctools\crt\crtw32\startup\crt0.c (165):
TestsTLS-11.exe!mainCRTStartup()
---------- Block 4680 at 0x00822608: 24 bytes ----------
Leak Hash: 0x7CF76213, Count: 1, Total 24 bytes
Call Stack (TID 2904):
ntdll.dll!RtlAllocateHeap()
f:\dd\vctools\crt\crtw32\misc\dbgmalloc.c (56): TestsTLS-11.exe!malloc()
+ 0x15 bytes
e:\openssl-1.1.git\crypto\mem.c (138): TestsTLS-11.exe!CRYPTO_malloc() +
0x9 bytes
e:\openssl-1.1.git\crypto\mem.c (158): TestsTLS-11.exe!CRYPTO_zalloc() +
0x11 bytes
e:\openssl-1.1.git\crypto\evp\digest.c (154):
TestsTLS-11.exe!EVP_MD_CTX_new() + 0xB bytes
e:\openssl-1.1.git\crypto\hmac\hmac.c (218):
TestsTLS-11.exe!HMAC_CTX_reset() + 0x5 bytes
e:\openssl-1.1.git\crypto\hmac\hmac.c (177):
TestsTLS-11.exe!HMAC_CTX_new() + 0x9 bytes
e:\openssl-1.1.git\ssl\t1_lib.c (3060):
TestsTLS-11.exe!tls_decrypt_ticket() + 0x5 bytes
e:\openssl-1.1.git\ssl\t1_lib.c (2994):
TestsTLS-11.exe!tls_check_serverhello_tlsext_early() + 0x2F bytes
e:\openssl-1.1.git\ssl\ssl_sess.c (536):
TestsTLS-11.exe!ssl_get_prev_session() + 0x18 bytes
e:\openssl-1.1.git\ssl\statem\statem_srvr.c (1181):
TestsTLS-11.exe!tls_process_client_hello() + 0x11 bytes
e:\openssl-1.1.git\ssl\statem\statem_srvr.c (804):
TestsTLS-11.exe!ossl_statem_server_process_message() + 0xD bytes
e:\openssl-1.1.git\ssl\statem\statem.c (609):
TestsTLS-11.exe!read_state_machine() + 0xB bytes
e:\openssl-1.1.git\ssl\statem\statem.c (429):
TestsTLS-11.exe!state_machine() + 0x9 bytes
e:\openssl-1.1.git\ssl\statem\statem.c (222):
TestsTLS-11.exe!ossl_statem_accept() + 0xB bytes
e:\openssl-1.1.git\ssl\ssl_lib.c (2908):
TestsTLS-11.exe!SSL_do_handshake() + 0xC bytes
p:\mes programmes\shared\ocrypto-11\tls.cpp (1017):
TestsTLS-11.exe!OTLS::TLSSss::DoHandshake() + 0xC bytes
p:\mes programmes\tests\_testsshared\teststls-11-leak -
copie\testtls.cpp (202): TestsTLS-11.exe!main() + 0xB bytes
f:\dd\vctools\crt\crtw32\startup\crt0.c (165):
TestsTLS-11.exe!mainCRTStartup()
---------- Block 4681 at 0x00822660: 140 bytes ----------
Leak Hash: 0x86320408, Count: 1, Total 140 bytes
Call Stack (TID 2904):
ntdll.dll!RtlAllocateHeap()
f:\dd\vctools\crt\crtw32\misc\dbgmalloc.c (56): TestsTLS-11.exe!malloc()
+ 0x15 bytes
e:\openssl-1.1.git\crypto\mem.c (138): TestsTLS-11.exe!CRYPTO_malloc() +
0x9 bytes
e:\openssl-1.1.git\crypto\mem.c (158): TestsTLS-11.exe!CRYPTO_zalloc() +
0x11 bytes
e:\openssl-1.1.git\crypto\evp\evp_enc.c (95):
TestsTLS-11.exe!EVP_CIPHER_CTX_new() + 0xE bytes
e:\openssl-1.1.git\ssl\t1_lib.c (3063):
TestsTLS-11.exe!tls_decrypt_ticket() + 0x5 bytes
e:\openssl-1.1.git\ssl\t1_lib.c (2994):
TestsTLS-11.exe!tls_check_serverhello_tlsext_early() + 0x2F bytes
e:\openssl-1.1.git\ssl\ssl_sess.c (536):
TestsTLS-11.exe!ssl_get_prev_session() + 0x18 bytes
e:\openssl-1.1.git\ssl\statem\statem_srvr.c (1181):
TestsTLS-11.exe!tls_process_client_hello() + 0x11 bytes
e:\openssl-1.1.git\ssl\statem\statem_srvr.c (804):
TestsTLS-11.exe!ossl_statem_server_process_message() + 0xD bytes
e:\openssl-1.1.git\ssl\statem\statem.c (609):
TestsTLS-11.exe!read_state_machine() + 0xB bytes
e:\openssl-1.1.git\ssl\statem\statem.c (429):
TestsTLS-11.exe!state_machine() + 0x9 bytes
e:\openssl-1.1.git\ssl\statem\statem.c (222):
TestsTLS-11.exe!ossl_statem_accept() + 0xB bytes
e:\openssl-1.1.git\ssl\ssl_lib.c (2908):
TestsTLS-11.exe!SSL_do_handshake() + 0xC bytes
p:\mes programmes\shared\ocrypto-11\tls.cpp (1017):
TestsTLS-11.exe!OTLS::TLSSss::DoHandshake() + 0xC bytes
p:\mes programmes\tests\_testsshared\teststls-11-leak -
copie\testtls.cpp (202): TestsTLS-11.exe!main() + 0xB bytes
f:\dd\vctools\crt\crtw32\startup\crt0.c (165):
TestsTLS-11.exe!mainCRTStartup()
Visual Leak Detector detected 5 memory leaks (10545 bytes).
Largest number used: 138152 bytes.
Total allocations: 611193 bytes.
Visual Leak Detector is now exiting.
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