C++ libssh:简单实现中的内存丢失
我正在尝试一个非常简单的C++ libssh:简单实现中的内存丢失,c++,c,memory-leaks,valgrind,libssh,C++,C,Memory Leaks,Valgrind,Libssh,我正在尝试一个非常简单的libssh实现,但valgrind显示内存泄漏 代码是: #include <libssh/libssh.h> #include <stdlib.h> #include <stdio.h> #include <errno.h> #include <string.h> int main() { ssh_session my_ssh_session = ssh_new(); int
libssh
实现,但valgrind显示内存泄漏
代码是:
#include <libssh/libssh.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
int main()
{
ssh_session my_ssh_session = ssh_new();
int port = 22;
int rc, state;
const char *ip = "192.168.125.241";
char *password;
if (my_ssh_session == NULL)
exit(-1);
ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST, ip);
ssh_options_set(my_ssh_session, SSH_OPTIONS_PORT, &port);
rc = ssh_connect(my_ssh_session);
if (rc != SSH_OK)
{
fprintf(stderr, "Error connecting to localhost: %s\n",
ssh_get_error(my_ssh_session));
exit(-1);
}
state = ssh_is_server_known(my_ssh_session);
if(state == SSH_SERVER_KNOWN_OK)
printf("already added\n");
else
printf("require addition\n");
rc = ssh_userauth_password(my_ssh_session, "rohit", "password");
if (rc != SSH_AUTH_SUCCESS)
{
fprintf(stderr, "Error authenticating with password: %s\n",
ssh_get_error(my_ssh_session));
ssh_disconnect(my_ssh_session);
ssh_free(my_ssh_session);
exit(-1);
}
ssh_disconnect(my_ssh_session);
ssh_free(my_ssh_session);
}
gcc sshex.c -lssh
root@rohit-Precision-T1500:/# valgrind --tool=memcheck --leak-check=full --show-leak-kinds=all --show-reachable=no ./a.out
==1937== Memcheck, a memory error detector
==1937== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==1937== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==1937== Command: ./a.out
==1937==
yahoo
==1937==
==1937== HEAP SUMMARY:
==1937== in use at exit: 14,256 bytes in 521 blocks
==1937== total heap usage: 1,339 allocs, 818 frees, 92,442 bytes allocated
==1937==
==1937== 24 bytes in 1 blocks are indirectly lost in loss record 507 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3A59: BN_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3F07: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E6079B: pki_signature_from_blob (pki_crypto.c:1384)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937== by 0x4E5D951: ssh_socket_pollcallback (socket.c:290)
==1937==
==1937== 24 bytes in 1 blocks are indirectly lost in loss record 508 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3A59: BN_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3F07: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E607EC: pki_signature_from_blob (pki_crypto.c:1405)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937== by 0x4E5D951: ssh_socket_pollcallback (socket.c:290)
==1937==
==1937== 32 bytes in 1 blocks are indirectly lost in loss record 511 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E35E6: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3AD4: bn_expand2 (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3ECF: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E6079B: pki_signature_from_blob (pki_crypto.c:1384)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937==
==1937== 32 bytes in 1 blocks are indirectly lost in loss record 512 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E35E6: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3AD4: bn_expand2 (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3ECF: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E607EC: pki_signature_from_blob (pki_crypto.c:1405)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937==
==1937== 48 bytes in 2 blocks are definitely lost in loss record 513 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3A59: BN_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x574C358: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750B1A: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750BC5: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750D79: ASN1_item_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E60734: pki_signature_from_blob (pki_crypto.c:1347)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937==
==1937== 128 (16 direct, 112 indirect) bytes in 1 blocks are definitely lost in loss record 516 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750D0B: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750D79: ASN1_item_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E60734: pki_signature_from_blob (pki_crypto.c:1347)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937== by 0x4E5D951: ssh_socket_pollcallback (socket.c:290)
==1937==
==1937== LEAK SUMMARY:
==1937== definitely lost: 64 bytes in 3 blocks
==1937== indirectly lost: 112 bytes in 4 blocks
==1937== possibly lost: 0 bytes in 0 blocks
==1937== still reachable: 14,080 bytes in 514 blocks
==1937== suppressed: 0 bytes in 0 blocks
==1937== Reachable blocks (those to which a pointer was found) are not shown.
root@rohit-Precision-T1500:/# gcc sshex.c -lssh
root@rohit-Precision-T1500:/# ./a.out
already added
root@rohit-Precision-T1500:/#
root@rohit-Precision-T1500:/# uname -a
Linux rohit-Precision-T1500 3.13.0-43-generic #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
VALGRIND跑步:
#include <libssh/libssh.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
int main()
{
ssh_session my_ssh_session = ssh_new();
int port = 22;
int rc, state;
const char *ip = "192.168.125.241";
char *password;
if (my_ssh_session == NULL)
exit(-1);
ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST, ip);
ssh_options_set(my_ssh_session, SSH_OPTIONS_PORT, &port);
rc = ssh_connect(my_ssh_session);
if (rc != SSH_OK)
{
fprintf(stderr, "Error connecting to localhost: %s\n",
ssh_get_error(my_ssh_session));
exit(-1);
}
state = ssh_is_server_known(my_ssh_session);
if(state == SSH_SERVER_KNOWN_OK)
printf("already added\n");
else
printf("require addition\n");
rc = ssh_userauth_password(my_ssh_session, "rohit", "password");
if (rc != SSH_AUTH_SUCCESS)
{
fprintf(stderr, "Error authenticating with password: %s\n",
ssh_get_error(my_ssh_session));
ssh_disconnect(my_ssh_session);
ssh_free(my_ssh_session);
exit(-1);
}
ssh_disconnect(my_ssh_session);
ssh_free(my_ssh_session);
}
gcc sshex.c -lssh
root@rohit-Precision-T1500:/# valgrind --tool=memcheck --leak-check=full --show-leak-kinds=all --show-reachable=no ./a.out
==1937== Memcheck, a memory error detector
==1937== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==1937== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==1937== Command: ./a.out
==1937==
yahoo
==1937==
==1937== HEAP SUMMARY:
==1937== in use at exit: 14,256 bytes in 521 blocks
==1937== total heap usage: 1,339 allocs, 818 frees, 92,442 bytes allocated
==1937==
==1937== 24 bytes in 1 blocks are indirectly lost in loss record 507 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3A59: BN_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3F07: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E6079B: pki_signature_from_blob (pki_crypto.c:1384)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937== by 0x4E5D951: ssh_socket_pollcallback (socket.c:290)
==1937==
==1937== 24 bytes in 1 blocks are indirectly lost in loss record 508 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3A59: BN_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3F07: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E607EC: pki_signature_from_blob (pki_crypto.c:1405)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937== by 0x4E5D951: ssh_socket_pollcallback (socket.c:290)
==1937==
==1937== 32 bytes in 1 blocks are indirectly lost in loss record 511 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E35E6: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3AD4: bn_expand2 (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3ECF: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E6079B: pki_signature_from_blob (pki_crypto.c:1384)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937==
==1937== 32 bytes in 1 blocks are indirectly lost in loss record 512 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E35E6: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3AD4: bn_expand2 (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3ECF: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E607EC: pki_signature_from_blob (pki_crypto.c:1405)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937==
==1937== 48 bytes in 2 blocks are definitely lost in loss record 513 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3A59: BN_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x574C358: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750B1A: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750BC5: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750D79: ASN1_item_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E60734: pki_signature_from_blob (pki_crypto.c:1347)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937==
==1937== 128 (16 direct, 112 indirect) bytes in 1 blocks are definitely lost in loss record 516 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750D0B: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750D79: ASN1_item_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E60734: pki_signature_from_blob (pki_crypto.c:1347)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937== by 0x4E5D951: ssh_socket_pollcallback (socket.c:290)
==1937==
==1937== LEAK SUMMARY:
==1937== definitely lost: 64 bytes in 3 blocks
==1937== indirectly lost: 112 bytes in 4 blocks
==1937== possibly lost: 0 bytes in 0 blocks
==1937== still reachable: 14,080 bytes in 514 blocks
==1937== suppressed: 0 bytes in 0 blocks
==1937== Reachable blocks (those to which a pointer was found) are not shown.
root@rohit-Precision-T1500:/# gcc sshex.c -lssh
root@rohit-Precision-T1500:/# ./a.out
already added
root@rohit-Precision-T1500:/#
root@rohit-Precision-T1500:/# uname -a
Linux rohit-Precision-T1500 3.13.0-43-generic #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
直接运行:
#include <libssh/libssh.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
int main()
{
ssh_session my_ssh_session = ssh_new();
int port = 22;
int rc, state;
const char *ip = "192.168.125.241";
char *password;
if (my_ssh_session == NULL)
exit(-1);
ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST, ip);
ssh_options_set(my_ssh_session, SSH_OPTIONS_PORT, &port);
rc = ssh_connect(my_ssh_session);
if (rc != SSH_OK)
{
fprintf(stderr, "Error connecting to localhost: %s\n",
ssh_get_error(my_ssh_session));
exit(-1);
}
state = ssh_is_server_known(my_ssh_session);
if(state == SSH_SERVER_KNOWN_OK)
printf("already added\n");
else
printf("require addition\n");
rc = ssh_userauth_password(my_ssh_session, "rohit", "password");
if (rc != SSH_AUTH_SUCCESS)
{
fprintf(stderr, "Error authenticating with password: %s\n",
ssh_get_error(my_ssh_session));
ssh_disconnect(my_ssh_session);
ssh_free(my_ssh_session);
exit(-1);
}
ssh_disconnect(my_ssh_session);
ssh_free(my_ssh_session);
}
gcc sshex.c -lssh
root@rohit-Precision-T1500:/# valgrind --tool=memcheck --leak-check=full --show-leak-kinds=all --show-reachable=no ./a.out
==1937== Memcheck, a memory error detector
==1937== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==1937== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==1937== Command: ./a.out
==1937==
yahoo
==1937==
==1937== HEAP SUMMARY:
==1937== in use at exit: 14,256 bytes in 521 blocks
==1937== total heap usage: 1,339 allocs, 818 frees, 92,442 bytes allocated
==1937==
==1937== 24 bytes in 1 blocks are indirectly lost in loss record 507 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3A59: BN_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3F07: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E6079B: pki_signature_from_blob (pki_crypto.c:1384)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937== by 0x4E5D951: ssh_socket_pollcallback (socket.c:290)
==1937==
==1937== 24 bytes in 1 blocks are indirectly lost in loss record 508 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3A59: BN_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3F07: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E607EC: pki_signature_from_blob (pki_crypto.c:1405)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937== by 0x4E5D951: ssh_socket_pollcallback (socket.c:290)
==1937==
==1937== 32 bytes in 1 blocks are indirectly lost in loss record 511 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E35E6: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3AD4: bn_expand2 (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3ECF: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E6079B: pki_signature_from_blob (pki_crypto.c:1384)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937==
==1937== 32 bytes in 1 blocks are indirectly lost in loss record 512 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E35E6: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3AD4: bn_expand2 (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3ECF: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E607EC: pki_signature_from_blob (pki_crypto.c:1405)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937==
==1937== 48 bytes in 2 blocks are definitely lost in loss record 513 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3A59: BN_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x574C358: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750B1A: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750BC5: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750D79: ASN1_item_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E60734: pki_signature_from_blob (pki_crypto.c:1347)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937==
==1937== 128 (16 direct, 112 indirect) bytes in 1 blocks are definitely lost in loss record 516 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750D0B: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750D79: ASN1_item_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E60734: pki_signature_from_blob (pki_crypto.c:1347)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937== by 0x4E5D951: ssh_socket_pollcallback (socket.c:290)
==1937==
==1937== LEAK SUMMARY:
==1937== definitely lost: 64 bytes in 3 blocks
==1937== indirectly lost: 112 bytes in 4 blocks
==1937== possibly lost: 0 bytes in 0 blocks
==1937== still reachable: 14,080 bytes in 514 blocks
==1937== suppressed: 0 bytes in 0 blocks
==1937== Reachable blocks (those to which a pointer was found) are not shown.
root@rohit-Precision-T1500:/# gcc sshex.c -lssh
root@rohit-Precision-T1500:/# ./a.out
already added
root@rohit-Precision-T1500:/#
root@rohit-Precision-T1500:/# uname -a
Linux rohit-Precision-T1500 3.13.0-43-generic #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
LINUX版本:
#include <libssh/libssh.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
int main()
{
ssh_session my_ssh_session = ssh_new();
int port = 22;
int rc, state;
const char *ip = "192.168.125.241";
char *password;
if (my_ssh_session == NULL)
exit(-1);
ssh_options_set(my_ssh_session, SSH_OPTIONS_HOST, ip);
ssh_options_set(my_ssh_session, SSH_OPTIONS_PORT, &port);
rc = ssh_connect(my_ssh_session);
if (rc != SSH_OK)
{
fprintf(stderr, "Error connecting to localhost: %s\n",
ssh_get_error(my_ssh_session));
exit(-1);
}
state = ssh_is_server_known(my_ssh_session);
if(state == SSH_SERVER_KNOWN_OK)
printf("already added\n");
else
printf("require addition\n");
rc = ssh_userauth_password(my_ssh_session, "rohit", "password");
if (rc != SSH_AUTH_SUCCESS)
{
fprintf(stderr, "Error authenticating with password: %s\n",
ssh_get_error(my_ssh_session));
ssh_disconnect(my_ssh_session);
ssh_free(my_ssh_session);
exit(-1);
}
ssh_disconnect(my_ssh_session);
ssh_free(my_ssh_session);
}
gcc sshex.c -lssh
root@rohit-Precision-T1500:/# valgrind --tool=memcheck --leak-check=full --show-leak-kinds=all --show-reachable=no ./a.out
==1937== Memcheck, a memory error detector
==1937== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==1937== Using Valgrind-3.10.0.SVN and LibVEX; rerun with -h for copyright info
==1937== Command: ./a.out
==1937==
yahoo
==1937==
==1937== HEAP SUMMARY:
==1937== in use at exit: 14,256 bytes in 521 blocks
==1937== total heap usage: 1,339 allocs, 818 frees, 92,442 bytes allocated
==1937==
==1937== 24 bytes in 1 blocks are indirectly lost in loss record 507 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3A59: BN_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3F07: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E6079B: pki_signature_from_blob (pki_crypto.c:1384)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937== by 0x4E5D951: ssh_socket_pollcallback (socket.c:290)
==1937==
==1937== 24 bytes in 1 blocks are indirectly lost in loss record 508 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3A59: BN_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3F07: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E607EC: pki_signature_from_blob (pki_crypto.c:1405)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937== by 0x4E5D951: ssh_socket_pollcallback (socket.c:290)
==1937==
==1937== 32 bytes in 1 blocks are indirectly lost in loss record 511 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E35E6: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3AD4: bn_expand2 (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3ECF: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E6079B: pki_signature_from_blob (pki_crypto.c:1384)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937==
==1937== 32 bytes in 1 blocks are indirectly lost in loss record 512 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E35E6: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3AD4: bn_expand2 (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3ECF: BN_bin2bn (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E607EC: pki_signature_from_blob (pki_crypto.c:1405)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937==
==1937== 48 bytes in 2 blocks are definitely lost in loss record 513 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x56E3A59: BN_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x574C358: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750B1A: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750BC5: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750D79: ASN1_item_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E60734: pki_signature_from_blob (pki_crypto.c:1347)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937==
==1937== 128 (16 direct, 112 indirect) bytes in 1 blocks are definitely lost in loss record 516 of 520
==1937== at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1937== by 0x56AAD32: CRYPTO_malloc (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750D0B: ??? (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x5750D79: ASN1_item_new (in /lib/x86_64-linux-gnu/libcrypto.so.1.0.0)
==1937== by 0x4E60734: pki_signature_from_blob (pki_crypto.c:1347)
==1937== by 0x4E599F9: ssh_pki_import_signature_blob (pki.c:1262)
==1937== by 0x4E59A77: ssh_pki_signature_verify_blob (pki.c:1281)
==1937== by 0x4E578DE: ssh_packet_newkeys (packet_cb.c:186)
==1937== by 0x4E56E6F: ssh_packet_process (packet.c:422)
==1937== by 0x4E57374: ssh_packet_socket_callback (packet.c:326)
==1937== by 0x4E573B3: ssh_packet_socket_callback (packet.c:336)
==1937== by 0x4E5D951: ssh_socket_pollcallback (socket.c:290)
==1937==
==1937== LEAK SUMMARY:
==1937== definitely lost: 64 bytes in 3 blocks
==1937== indirectly lost: 112 bytes in 4 blocks
==1937== possibly lost: 0 bytes in 0 blocks
==1937== still reachable: 14,080 bytes in 514 blocks
==1937== suppressed: 0 bytes in 0 blocks
==1937== Reachable blocks (those to which a pointer was found) are not shown.
root@rohit-Precision-T1500:/# gcc sshex.c -lssh
root@rohit-Precision-T1500:/# ./a.out
already added
root@rohit-Precision-T1500:/#
root@rohit-Precision-T1500:/# uname -a
Linux rohit-Precision-T1500 3.13.0-43-generic #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
我在这方面做过实验。如果我删除函数ssh\u connect()
(当然还有下面的其他函数),那么就不会有任何泄漏。因此,泄漏一定是由该函数引起的。但是在我的小程序中,我使用了函数ssh\u disconnect()
来释放ssh\u connect()
分配的内存。那么,我如何确保内存被释放呢
我想在我的软件中使用SCP功能,这将是一个长期的过程。因此,内存泄漏将是一个严重的问题。
据我了解,泄漏与libcrypto
库有关,该库可能不是libssh
的泄漏。如果是或不是,解决这些泄漏的方法是什么?
我哪里做错了?正如我所怀疑的那样。这可能是
libcrypto
中的错误。我在RHEL6.5中运行了我的程序,valgrind显示没有泄漏
以下是输出的片段:
[root@demo-hadoop test]# gcc sshex.c -lssh
[root@demo-hadoop test]# valgrind --tool=memcheck ./a.out
==23636== Memcheck, a memory error detector
==23636== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al.
==23636== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info
==23636== Command: ./a.out
==23636==
already added
==23636==
==23636== HEAP SUMMARY:
==23636== in use at exit: 15,304 bytes in 532 blocks
==23636== total heap usage: 1,067 allocs, 535 frees, 82,199 bytes allocated
==23636==
==23636== LEAK SUMMARY:
==23636== definitely lost: 0 bytes in 0 blocks
==23636== indirectly lost: 0 bytes in 0 blocks
==23636== possibly lost: 0 bytes in 0 blocks
==23636== still reachable: 15,304 bytes in 532 blocks
==23636== suppressed: 0 bytes in 0 blocks
==23636== Rerun with --leak-check=full to see details of leaked memory
==23636==
==23636== For counts of detected and suppressed errors, rerun with: -v
==23636== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 6 from 6)
[root@demo-hadoop test]#
[root@demo-hadoop test]#
[root@demo-hadoop test]# uname -a
Linux demo-hadoop 2.6.32-431.el6.x86_64 #1 SMP Sun Nov 10 22:19:54 EST 2013 x86_64 x86_64 x86_64 GNU/Linux
当然,这不是
libssh
中的错误 你不需要一个ssh\u免费(我的ssh\u会话)吗
在fprintf(stderr,“连接本地主机时出错:%s\n”,ssh\u get\u错误(my\u ssh\u会话))之后代码>?这不会改变任何事情。无论如何,程序将在您指示的块之后终止并释放所有内存。我已经粘贴了一个成功运行程序的日志。你能发布程序的输出吗?更新。请在问题中查找直接运行下的内容。