https://git.reactos.org/?p=reactos.git;a=commitdiff;h=bc8307205b725b661d34b9848de8c7411cc3febc
commit bc8307205b725b661d34b9848de8c7411cc3febc Author: Thomas Faber <[email protected]> AuthorDate: Sat Jan 12 16:25:34 2019 +0100 Commit: Thomas Faber <[email protected]> CommitDate: Sat Jan 12 16:27:30 2019 +0100 [FASTFAT] Avoid a use after free in VfatCheckForDismount. --- drivers/filesystems/fastfat/misc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/filesystems/fastfat/misc.c b/drivers/filesystems/fastfat/misc.c index 2068e8b5e4..b0721230cd 100644 --- a/drivers/filesystems/fastfat/misc.c +++ b/drivers/filesystems/fastfat/misc.c @@ -539,12 +539,12 @@ VfatCheckForDismount( } if (DeviceExt->FATFileObject) { - Fcb = (PVFATFCB)DeviceExt->FATFileObject->FsContext; + Fcb = DeviceExt->FATFileObject->FsContext; CcUninitializeCacheMap(DeviceExt->FATFileObject, &Zero, NULL); - ObDereferenceObject(DeviceExt->FATFileObject); DeviceExt->FATFileObject->FsContext = NULL; + ObDereferenceObject(DeviceExt->FATFileObject); DeviceExt->FATFileObject = NULL; vfatDestroyFCB(Fcb); }
