moparisthebest/curl
1
0
Fork 0
mirror of https://github.com/moparisthebest/curl synced 2024-11-12 04:25:08 -05:00
Code Issues Releases Wiki Activity

connect.c: fix multiple possible dereferences of null pointers

Browse Source 
In case the first address in the tempaddr array is NULL,
the code would previously dereference an unchecked null pointer.
This commit is contained in:
Marc Hoersken 2014-04-18 23:56:54 +02:00
parent 3f74e149f8
commit 7296fc9e7e
1 changed files with 10 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
lib/connect.c
View File

@ -545,7 +545,7 @@ static CURLcode trynextip(struct connectdata *conn,
conn->tempsock[tempindex] = CURL_SOCKET_BAD; conn->tempsock[tempindex] = CURL_SOCKET_BAD;
if(sockindex == FIRSTSOCKET) { if(sockindex == FIRSTSOCKET) {
Curl_addrinfo *ai; Curl_addrinfo *ai = NULL;
int family; int family;
if(conn->tempaddr[tempindex]) { if(conn->tempaddr[tempindex]) {
@ -553,7 +553,7 @@ static CURLcode trynextip(struct connectdata *conn,
family = conn->tempaddr[tempindex]->ai_family; family = conn->tempaddr[tempindex]->ai_family;
ai = conn->tempaddr[tempindex]->ai_next; ai = conn->tempaddr[tempindex]->ai_next;
} }
else { else if(conn->tempaddr[0]) {
/* happy eyeballs - try the other protocol family */ /* happy eyeballs - try the other protocol family */
int firstfamily = conn->tempaddr[0]->ai_family; int firstfamily = conn->tempaddr[0]->ai_family;
#ifdef ENABLE_IPV6 #ifdef ENABLE_IPV6
@ -811,14 +811,16 @@ CURLcode Curl_is_connected(struct connectdata *conn,
char ipaddress[MAX_IPADR_LEN]; char ipaddress[MAX_IPADR_LEN];
data->state.os_errno = error; data->state.os_errno = error;
SET_SOCKERRNO(error); SET_SOCKERRNO(error);
Curl_printable_address(conn->tempaddr[i], ipaddress, MAX_IPADR_LEN); if(conn->tempaddr[i]) {
infof(data, "connect to %s port %ld failed: %s\n", Curl_printable_address(conn->tempaddr[i], ipaddress, MAX_IPADR_LEN);
ipaddress, conn->port, Curl_strerror(conn, error)); infof(data, "connect to %s port %ld failed: %s\n",
ipaddress, conn->port, Curl_strerror(conn, error));
conn->timeoutms_per_addr = conn->tempaddr[i]->ai_next == NULL ? conn->timeoutms_per_addr = conn->tempaddr[i]->ai_next == NULL ?
allow : allow / 2; allow : allow / 2;
code = trynextip(conn, sockindex, i); code = trynextip(conn, sockindex, i);
}
} }
} }