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| author |   Simon Rozman <simon@rozman.si> | 2019-06-20 12:00:21 +0200 |
|---|---|---|
| committer | Simon Rozman <simon@rozman.si> | 2019-06-20 12:00:21 +0200 |
| commit | faf810e8cb76ce88e61591610bcb626b7a08c62b (patch) | |
| tree | 249a3ca86e0a2decd66f6904ea93696d051da697 | |
| parent | Save some valuable lessons learned on Windows internals (diff) | |
| download | wintun-faf810e8cb76ce88e61591610bcb626b7a08c62b.tar.xz wintun-faf810e8cb76ce88e61591610bcb626b7a08c62b.zip | |
Fix NdisQueryMdl() NULL-buffer check
Signed-off-by: Simon Rozman <simon@rozman.si>
| -rw-r--r-- | wintun.c | 3 |
1 files changed, 2 insertions, 1 deletions
@@ -258,8 +258,9 @@ static NTSTATUS TunGetIrpBuffer(_In_ IRP *Irp, _Out_ UCHAR **buffer, _Out_ ULONG if (!Irp->MdlAddress) return STATUS_INVALID_PARAMETER; ULONG size_mdl; + *buffer = NULL; NdisQueryMdl(Irp->MdlAddress, buffer, &size_mdl, priority); - if (!buffer) + if (!*buffer) return STATUS_INSUFFICIENT_RESOURCES; if (size_mdl < *size) *size = size_mdl; |