[PATCH] iphlpapi: Fix potential crash in IcmpCloseHandle

[Tim Crawford]

Handle case when IcmpCloseHandle is passed a NULL handle.

Signed-off-by: Tim Crawford <tcrawford at datto.com>
---
 dlls/iphlpapi/icmp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/iphlpapi/icmp.c b/dlls/iphlpapi/icmp.c
index ebc2f2b..8cba237 100644
--- a/dlls/iphlpapi/icmp.c
+++ b/dlls/iphlpapi/icmp.c
@@ -241,7 +241,7 @@ HANDLE WINAPI IcmpCreateFile(VOID)
 BOOL WINAPI IcmpCloseHandle(HANDLE  IcmpHandle)
 {
     icmp_t* icp=(icmp_t*)IcmpHandle;
-    if (IcmpHandle==INVALID_HANDLE_VALUE) {
+    if (IcmpHandle==INVALID_HANDLE_VALUE || IcmpHandle==NULL) {
         /* FIXME: in fact win98 seems to ignore the handle value !!! */
         SetLastError(ERROR_INVALID_HANDLE);
         return FALSE;
-- 
2.5.0