NetworkPkg: Code logic optimization for DnsDxe and HttpDxe driver
Revise some errors which may lead NULL pointer be dereferenced: * DnsDhcp.c: Paralist may be used without any initialized * DnsHeader and RcvString may be null but be dereferenced * HttpDriver.c: revise an if judgment * HttpImpl.c: add a judgment to avoid null dereferenced Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: fanwang2 <fan.wang@intel.com> Reviewed-by: Ye Ting <ting.ye@intel.com> Reviewed-by: Jiaxin Wu <jiaxin.wu@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17923 6f19259b-4bc3-4df7-8a09-765794883524
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@@ -301,6 +301,8 @@ GetDns4ServerFromDhcp4 (
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Data = NULL;
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InterfaceInfo = NULL;
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ZeroMem ((UINT8 *) ParaList, sizeof (ParaList));
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ZeroMem (&MnpConfigData, sizeof (EFI_MANAGED_NETWORK_CONFIG_DATA));
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ZeroMem (&DnsServerInfor, sizeof (DNS4_SERVER_INFOR));
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