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sys: fix issue #364

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This commit is contained in:
Bill Zissimopoulos
2021-04-16 16:43:34 -07:00
parent d0d67998c1
commit 33c6e7ee61
4 changed files with 64 additions and 4 deletions
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12
src/sys/file.c
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@ -38,7 +38,7 @@ VOID FspFileNodeSetOwnerF(FSP_FILE_NODE *FileNode, ULONG Flags, PVOID Owner);
VOID FspFileNodeReleaseF(FSP_FILE_NODE *FileNode, ULONG Flags);
VOID FspFileNodeReleaseOwnerF(FSP_FILE_NODE *FileNode, ULONG Flags, PVOID Owner);
NTSTATUS FspFileNodeOpen(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
UINT32 GrantedAccess, UINT32 ShareAccess,
UINT32 GrantedAccess, UINT32 AdditionalGrantedAccess, UINT32 ShareAccess,
FSP_FILE_NODE **POpenedFileNode, PULONG PSharingViolationReason);
VOID FspFileNodeCleanup(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject, PULONG PCleanupFlags);
VOID FspFileNodeCleanupFlush(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject);
@ -588,7 +588,7 @@ VOID FspFileNodeReleaseOwnerF(FSP_FILE_NODE *FileNode, ULONG Flags, PVOID Owner)
}
NTSTATUS FspFileNodeOpen(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
UINT32 GrantedAccess, UINT32 ShareAccess,
UINT32 GrantedAccess, UINT32 AdditionalGrantedAccess, UINT32 ShareAccess,
FSP_FILE_NODE **POpenedFileNode, PULONG PSharingViolationReason)
{
/*
@ -711,6 +711,14 @@ NTSTATUS FspFileNodeOpen(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
}
/* share access check */
if (0 != AdditionalGrantedAccess)
{
/* Additional share check for FILE_OVERWRITE*, FILE_SUPERSEDE. Fixes GitHub issue #364. */
Result = IoCheckShareAccess(GrantedAccess | AdditionalGrantedAccess, ShareAccess, FileObject,
&OpenedFileNode->ShareAccess, FALSE);
if (!NT_SUCCESS(Result))
goto exit;
}
Result = IoCheckShareAccess(GrantedAccess, ShareAccess, FileObject,
&OpenedFileNode->ShareAccess, TRUE);
if (!NT_SUCCESS(Result))