Details
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Bug
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Resolution: Fixed
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Major
Description
An ASSERT in FastFAT can be easily triggered from user mode, just by sending the appropriate FSCTL on the appropriate device.
Attached a test program.
OffsetToCluster is called with FirstCluster = 0!
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*** Assertion failed: FALSE
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*** Source File: /home/schweitzer/ReactOS/trunk/reactos.git/drivers/filesystems/fastfat/rw.c, line 79
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Break repeatedly, break Once, Ignore, terminate Process or terminate Thread (boipt)?
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kdb:> o
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Execute '.cxr F6B986B4' to dump context
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Entered debugger on embedded INT3 at 0x0008:0x8095088e.
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kdb:> bt
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Eip:
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f6b98994 <NTOSKRNL.EXE:15088f (:0 (DbgBreakPoint))>
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Frames:
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f6b989c4 <fastfat.sys:1260a (drivers/filesystems/fastfat/rw.c:79 (OffsetToCluster))>
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f6b98ac4 <fastfat.sys:10e23 (drivers/filesystems/fastfat/fsctl.c:982 (VfatFileSystemControl))>
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f6b98af4 <fastfat.sys:11a22 (drivers/filesystems/fastfat/misc.c:137 (VfatDispatchRequest))>
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f6b98b1c <fastfat.sys:120d0 (drivers/filesystems/fastfat/misc.c:248 (VfatBuildRequest))>
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f6b98b44 <NTOSKRNL.EXE:71d55 (ntoskrnl/io/iomgr/irp.c:1286 (IofCallDriver))>
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f6b98b84 <NTOSKRNL.EXE:696e1 (ntoskrnl/io/iomgr/iofunc.c:142 (IopPerformSynchronousRequest))>
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f6b98cb4 <NTOSKRNL.EXE:6a146 (ntoskrnl/io/iomgr/iofunc.c:633 (IopDeviceFsIoControl))>
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f6b98cec <NTOSKRNL.EXE:6af73 (ntoskrnl/io/iomgr/iofunc.c:1359 (NtFsControlFile))>
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f6b98d5c <NTOSKRNL.EXE:134eae (ntoskrnl/include/internal/i386/ke.h:712 (KiSystemServiceHandler))>
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f6b98d64 <NTOSKRNL.EXE:3da9 (:0 (KiFastCallEntry))>
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0022fe48 <ntdll.dll:eda5>
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0022feb8 <retrievalpointers.exe:163c>
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0022ffa0 <retrievalpointers.exe:13f5>
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0022fff0 <KERNEL32.dll:10c42>
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00000000 <00000000>
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