Hesham/wintun
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Fix NdisQueryMdl() NULL-buffer check

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Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
Simon Rozman 2019-06-20 12:00:21 +02:00
parent 9514ef37b3
commit faf810e8cb
1 changed files with 2 additions and 1 deletions
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wintun.c
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@ -258,8 +258,9 @@ static NTSTATUS TunGetIrpBuffer(_In_ IRP *Irp, _Out_ UCHAR **buffer, _Out_ ULONG
if (!Irp->MdlAddress) if (!Irp->MdlAddress)
return STATUS_INVALID_PARAMETER; return STATUS_INVALID_PARAMETER;
ULONG size_mdl; ULONG size_mdl;
*buffer = NULL;
NdisQueryMdl(Irp->MdlAddress, buffer, &size_mdl, priority); NdisQueryMdl(Irp->MdlAddress, buffer, &size_mdl, priority);
if (!buffer) if (!*buffer)
return STATUS_INSUFFICIENT_RESOURCES; return STATUS_INSUFFICIENT_RESOURCES;
if (size_mdl < *size) if (size_mdl < *size)
*size = size_mdl; *size = size_mdl;