apps/s_server.c:3101: error: NULL_DEREFERENCE
  pointer `rsa_tmp` last assigned on line 3099 could be null and is dereferenced by call to `RSA_free()` at line 3101, column 13.
Showing all 26 steps of the trace


apps/s_server.c:3086:1: start of procedure tmp_rsa_cb()
3084.   
3085.   #ifndef OPENSSL_NO_RSA
3086. > static RSA *tmp_rsa_cb(SSL *s, int is_export, int keylength)
3087.   {
3088.       BIGNUM *bn = NULL;

apps/s_server.c:3088:5: 
3086.   static RSA *tmp_rsa_cb(SSL *s, int is_export, int keylength)
3087.   {
3088. >     BIGNUM *bn = NULL;
3089.       static RSA *rsa_tmp = NULL;
3090.   

apps/s_server.c:3089:5: 
3087.   {
3088.       BIGNUM *bn = NULL;
3089. >     static RSA *rsa_tmp = NULL;
3090.   
3091.       if (!rsa_tmp && ((bn = BN_new()) == NULL))

apps/s_server.c:3091:10: Taking true branch
3089.       static RSA *rsa_tmp = NULL;
3090.   
3091.       if (!rsa_tmp && ((bn = BN_new()) == NULL))
                 ^
3092.           BIO_printf(bio_err, "Allocation error in generating RSA key\n");
3093.       if (!rsa_tmp && bn) {

apps/s_server.c:3091:22: Taking false branch
3089.       static RSA *rsa_tmp = NULL;
3090.   
3091.       if (!rsa_tmp && ((bn = BN_new()) == NULL))
                             ^
3092.           BIO_printf(bio_err, "Allocation error in generating RSA key\n");
3093.       if (!rsa_tmp && bn) {

apps/s_server.c:3093:10: Taking true branch
3091.       if (!rsa_tmp && ((bn = BN_new()) == NULL))
3092.           BIO_printf(bio_err, "Allocation error in generating RSA key\n");
3093.       if (!rsa_tmp && bn) {
                 ^
3094.           if (!s_quiet) {
3095.               BIO_printf(bio_err, "Generating temp (%d bit) RSA key...",

apps/s_server.c:3093:21: Taking true branch
3091.       if (!rsa_tmp && ((bn = BN_new()) == NULL))
3092.           BIO_printf(bio_err, "Allocation error in generating RSA key\n");
3093.       if (!rsa_tmp && bn) {
                            ^
3094.           if (!s_quiet) {
3095.               BIO_printf(bio_err, "Generating temp (%d bit) RSA key...",

apps/s_server.c:3094:14: Taking false branch
3092.           BIO_printf(bio_err, "Allocation error in generating RSA key\n");
3093.       if (!rsa_tmp && bn) {
3094.           if (!s_quiet) {
                     ^
3095.               BIO_printf(bio_err, "Generating temp (%d bit) RSA key...",
3096.                          keylength);

apps/s_server.c:3099:14: 
3097.               (void)BIO_flush(bio_err);
3098.           }
3099. >         if (!BN_set_word(bn, RSA_F4) || ((rsa_tmp = RSA_new()) == NULL) ||
3100.               !RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL)) {
3101.               RSA_free(rsa_tmp);

crypto/bn/bn_lib.c:527:1: start of procedure BN_set_word()
  525.   }
  526.   
  527. > int BN_set_word(BIGNUM *a, BN_ULONG w)
  528.   {
  529.       bn_check_top(a);

crypto/bn/bn_lib.c:530:9: Condition is true
  528.   {
  529.       bn_check_top(a);
  530.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                 ^
  531.           return (0);
  532.       a->neg = 0;

crypto/bn/bn_lib.c:530:9: Taking false branch
  528.   {
  529.       bn_check_top(a);
  530.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
                 ^
  531.           return (0);
  532.       a->neg = 0;

crypto/bn/bn_lib.c:532:5: 
  530.       if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
  531.           return (0);
  532. >     a->neg = 0;
  533.       a->d[0] = w;
  534.       a->top = (w ? 1 : 0);

crypto/bn/bn_lib.c:533:5: 
  531.           return (0);
  532.       a->neg = 0;
  533. >     a->d[0] = w;
  534.       a->top = (w ? 1 : 0);
  535.       bn_check_top(a);

crypto/bn/bn_lib.c:534:15: Condition is true
  532.       a->neg = 0;
  533.       a->d[0] = w;
  534.       a->top = (w ? 1 : 0);
                       ^
  535.       bn_check_top(a);
  536.       return (1);

crypto/bn/bn_lib.c:534:5: 
  532.       a->neg = 0;
  533.       a->d[0] = w;
  534. >     a->top = (w ? 1 : 0);
  535.       bn_check_top(a);
  536.       return (1);

crypto/bn/bn_lib.c:536:5: 
  534.       a->top = (w ? 1 : 0);
  535.       bn_check_top(a);
  536. >     return (1);
  537.   }
  538.   

crypto/bn/bn_lib.c:537:1: return from a call to BN_set_word
  535.       bn_check_top(a);
  536.       return (1);
  537. > }
  538.   
  539.   BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret)

apps/s_server.c:3099:14: Taking false branch
3097.               (void)BIO_flush(bio_err);
3098.           }
3099.           if (!BN_set_word(bn, RSA_F4) || ((rsa_tmp = RSA_new()) == NULL) ||
                     ^
3100.               !RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL)) {
3101.               RSA_free(rsa_tmp);

apps/s_server.c:3099:42: 
3097.               (void)BIO_flush(bio_err);
3098.           }
3099. >         if (!BN_set_word(bn, RSA_F4) || ((rsa_tmp = RSA_new()) == NULL) ||
3100.               !RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL)) {
3101.               RSA_free(rsa_tmp);

crypto/rsa/rsa_lib.c:72:1: start of procedure RSA_new()
  70.   static const RSA_METHOD *default_RSA_meth = NULL;
  71.   
  72. > RSA *RSA_new(void)
  73.   {
  74.       RSA *r = RSA_new_method(NULL);

crypto/rsa/rsa_lib.c:74:5: Skipping RSA_new_method(): empty list of specs
  72.   RSA *RSA_new(void)
  73.   {
  74.       RSA *r = RSA_new_method(NULL);
            ^
  75.   
  76.       return r;

crypto/rsa/rsa_lib.c:76:5: 
  74.       RSA *r = RSA_new_method(NULL);
  75.   
  76. >     return r;
  77.   }
  78.   

crypto/rsa/rsa_lib.c:77:1: return from a call to RSA_new
  75.   
  76.       return r;
  77. > }
  78.   
  79.   void RSA_set_default_method(const RSA_METHOD *meth)

apps/s_server.c:3099:42: Taking true branch
3097.               (void)BIO_flush(bio_err);
3098.           }
3099.           if (!BN_set_word(bn, RSA_F4) || ((rsa_tmp = RSA_new()) == NULL) ||
                                                 ^
3100.               !RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL)) {
3101.               RSA_free(rsa_tmp);

apps/s_server.c:3101:13: 
3099.           if (!BN_set_word(bn, RSA_F4) || ((rsa_tmp = RSA_new()) == NULL) ||
3100.               !RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL)) {
3101. >             RSA_free(rsa_tmp);
3102.               rsa_tmp = NULL;
3103.           }

static RSA *tmp_rsa_cb(SSL *s, int is_export, int keylength)
{
    BIGNUM *bn = NULL;
    static RSA *rsa_tmp = NULL;
    if (!rsa_tmp && ((bn = BN_new()) == NULL))
        BIO_printf(bio_err, "Allocation error in generating RSA key\n");
    if (!rsa_tmp && bn) {
        if (!s_quiet) {
            BIO_printf(bio_err, "Generating temp (%d bit) RSA key...",
                       keylength);
            (void)BIO_flush(bio_err);
        }
        if (!BN_set_word(bn, RSA_F4) || ((rsa_tmp = RSA_new()) == NULL) ||
            !RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL)) {
            RSA_free(rsa_tmp);
            rsa_tmp = NULL;
        }
        if (!s_quiet) {
            BIO_printf(bio_err, "\n");
            (void)BIO_flush(bio_err);
        }
        BN_free(bn);
    }
    return (rsa_tmp);
}
['static RSA *tmp_rsa_cb(SSL *s, int is_export, int keylength)\n{\n    BIGNUM *bn = NULL;\n    static RSA *rsa_tmp = NULL;\n    if (!rsa_tmp && ((bn = BN_new()) == NULL))\n        BIO_printf(bio_err, "Allocation error in generating RSA key\\n");\n    if (!rsa_tmp && bn) {\n        if (!s_quiet) {\n            BIO_printf(bio_err, "Generating temp (%d bit) RSA key...",\n                       keylength);\n            (void)BIO_flush(bio_err);\n        }\n        if (!BN_set_word(bn, RSA_F4) || ((rsa_tmp = RSA_new()) == NULL) ||\n            !RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL)) {\n            RSA_free(rsa_tmp);\n            rsa_tmp = NULL;\n        }\n        if (!s_quiet) {\n            BIO_printf(bio_err, "\\n");\n            (void)BIO_flush(bio_err);\n        }\n        BN_free(bn);\n    }\n    return (rsa_tmp);\n}', 'int BN_set_word(BIGNUM *a, BN_ULONG w)\n{\n    bn_check_top(a);\n    if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)\n        return (0);\n    a->neg = 0;\n    a->d[0] = w;\n    a->top = (w ? 1 : 0);\n    bn_check_top(a);\n    return (1);\n}', 'RSA *RSA_new(void)\n{\n    RSA *r = RSA_new_method(NULL);\n    return r;\n}']