Using curl 7.16.1 and 7.20.0
with openssl 0.9.8l and 0.9.8o
I am getting intermittent crashes. Apache is setup with a pkcs12 cert
and when this fails it is always early in the process ie: initialization
of the threads. I'm guessing either curl or ssl has a missing lock but
I'm not sure which and where. Any assistance is greatly appreciated.
The callstack usually looks something like the following or ends up in
the CRYPTO_malloc functions.
#0 0x00007f7ec59c4516 in pbe_cmp ()
from /lib/libcrypto.so.0.9.8
#1 0x00007f7ec5baab15 in msort_with_tmp (p=<value optimized out>,
b=<value optimized out>, n=<value optimized out>) at msort.c:83
#2 0x00007f7ec5baaa08 in msort_with_tmp (p=0xae1000, b=0xae1008,
n=<value optimized out>) at msort.c:53
#3 0x00007f7ec5baaa08 in msort_with_tmp (p=0xae1000, b=0xae1008,
n=<value optimized out>) at msort.c:53
#4 0x00007f7ec5baaa08 in msort_with_tmp (p=0xae1000, b=0xae1008,
n=<value optimized out>) at msort.c:53
#5 0x00007f7ec5baaa08 in msort_with_tmp (p=0xae1000, b=0xae1008,
n=<value optimized out>) at msort.c:53
#6 0x00007f7ec5bab09c in *__GI_qsort_r (b=<value optimized out>,
n=<value optimized out>, s=8, cmp=0x7f7ec59c4510 <pbe_cmp>, arg=0x0)
at msort.c:294
#7 0x00007f7ec59b70d7 in sk_sort ()
from /lib/libcrypto.so.0.9.8
#8 0x00007f7ec59b71d1 in sk_find ()
from /lib/libcrypto.so.0.9.8
#9 0x00007f7ec59c4461 in EVP_PBE_CipherInit ()
from /lib/libcrypto.so.0.9.8
#10 0x00007f7ec59fdfb2 in PKCS12_pbe_crypt ()
from /lib/libcrypto.so.0.9.8
#11 0x00007f7ec59fe123 in PKCS12_item_decrypt_d2i ()
from /lib/libcrypto.so.0.9.8
#12 0x00007f7ec59feeb1 in PKCS12_parse ()
from /lib/libcrypto.so.0.9.8
#13 0x00007f7ec5fd683e in cert_stuff ()
from /lib/libcurl.so.4
This program is failing about 50% for me currently and always fails
before the thread get to the curl_easy_perform
#include <stdio.h>
#include <pthread.h>
#include <curl/curl.h>
#include "openssl/crypto.h"
#define NUMT 16
static void *pull_one_url(void *url)
{
CURL *curl;
int i;
char buffer[CURL_ERROR_SIZE];
int num_tries = 10;
int num_successes = 0;
curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "https://10.17.11.31";);
curl_easy_setopt(curl, CURLOPT_VERBOSE, 0);
curl_easy_setopt(curl, CURLOPT_SSLCERT, "mycert.pfx");
curl_easy_setopt(curl, CURLOPT_SSLCERTTYPE, "p12");
curl_easy_setopt(curl, CURLOPT_KEYPASSWD, "exportpass");
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(curl, CURLOPT_DNS_USE_GLOBAL_CACHE, 0L);
curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_IGNORED);
curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, buffer);
for( i = 0; i < num_tries; i++ )
{
if( curl_easy_perform(curl) == 0 )
num_successes++;
else
{
fprintf(stderr, "ERROR: %s\n", buffer);
}
}
curl_easy_cleanup(curl);
printf("DEBUG: %ud :: %i/%i\n", (unsigned long)pthread_self(),
num_successes, num_tries);
return NULL;
}
static pthread_mutex_t **locks = NULL;
static int n_locks = 0;
static void
ssl_lock(int mode, int n, const char *file, int line)
{
if (mode & CRYPTO_LOCK) pthread_mutex_lock(locks[n]);
else pthread_mutex_unlock(locks[n]);
}
static unsigned long
ssl_thread_id(void)
{
return (unsigned long)pthread_self();
}
int main(int argc, char **argv)
{
pthread_t tid[NUMT];
int i;
int error;
n_locks = CRYPTO_num_locks();
if (n_locks) {
locks = (pthread_mutex_t **) malloc(n_locks * sizeof(*locks));
for (i=0; i < n_locks; i++) {
locks[i] = (pthread_mutex_t*)malloc(sizeof(pthread_mutex_t));
if( pthread_mutex_init(locks[i], NULL) )
exit(1);
}
CRYPTO_set_locking_callback(ssl_lock);
CRYPTO_set_id_callback(ssl_thread_id);
}
/* Must initialize libcurl before any threads are started */
curl_global_init(CURL_GLOBAL_ALL);
{
int cnt = 0;
for( cnt = 0; cnt < 1; cnt++ )
{
for(i=0; i< NUMT; i++) {
error = pthread_create(&tid[i],
NULL, /* default attributes please
*/
pull_one_url,
(void *)NULL);
if(0 != error)
fprintf(stderr, "Couldn't run thread number %d, errno
%d\n", i, error);
else
fprintf(stderr, "Thread %d, started\n", i);
}
/* now wait for all threads to terminate */
for(i=0; i< NUMT; i++) {
error = pthread_join(tid[i], NULL);
fprintf(stderr, "Thread %d terminated\n", i);
}
}
}
return 0;
}
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