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MdeModulePkg/NetworkPkg: Checking for NULL pointer before use.

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Contributed-under: TianoCore Contribution Agreement 1.1

Signed-off-by: Sivaraman Nainar <sivaramann@amiindia.co.in>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
This commit is contained in:
Fu Siyuan
2018-06-14 10:30:09 +08:00
parent 855abe0204
commit 1e0db7b119
3 changed files with 9 additions and 3 deletions
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7
MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Impl.c
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@@ -1048,8 +1048,11 @@ Ip4Groups (
// is decreamented each time an address is removed..
//
for (Index = IpInstance->GroupCount; Index > 0 ; Index--) {
Group = IpInstance->Groups[Index - 1];
Group = 0;
if(IpInstance->Groups != NULL) {
Group = IpInstance->Groups[Index - 1];
}
if ((GroupAddress == NULL) || EFI_IP4_EQUAL (&Group, GroupAddress)) {
if (EFI_ERROR (Ip4LeaveGroup (IpInstance, NTOHL (Group)))) {
return EFI_DEVICE_ERROR;