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http://bugs.exim.org/show_bug.cgi?id=619 Summary: Core dumps on NULL hosts->h_name Product: Exim Version: 4.68 Platform: x86 OS/Version: Solaris Status: NEW Severity: bug Priority: medium Component: General execution AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] CC: [email protected] Created an attachment (id=214) --> (http://bugs.exim.org/attachment.cgi?id=214) Fix NULL pointer dereference in host_name_lookup_byaddr On Solaris 10 x86 we're seeing NULL pointers in h_name on return from gethostbyaddr which is causing coredumps around host.c:1505: if (hosts->h_name[0] == 0 || hosts->h_name[0] == '.') Can be demonstrated using this test program: #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <netdb.h> #include <stdio.h> int main(void) { struct in_addr addr; struct hostent *hosts; addr.s_addr = inet_addr("91.186.12.143"); hosts = gethostbyaddr(&addr, sizeof(addr), AF_INET); printf("hosts=%lx\n", hosts); printf("hosts->h_name=%lx\n", hosts->h_name); printf("hosts->h_name='%s'\n", hosts->h_name); } gives: hosts=80609b4 hosts->h_name=0 Segmentation Fault (core dumped) Suggested patch attached. -- Configure bugmail: http://bugs.exim.org/userprefs.cgi?tab=email -- ## List details at http://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
