mirror of
https://github.com/reactos/reactos.git
synced 2026-05-23 15:50:29 +08:00
d436f2e76b
Cherry-picking commit
3158b917a2
See https://github.com/bobranten/Ext4Fsd/issues/83 for more information,
and debug traces.
## How to reproduce:
- Format a partition in Ext2 with Paragon Hard Disk Manager 2010 Professional.
- Compile ReactOS with MSVC, ensuring that the driver is compiled with
`EXT2_HTREE_INDEX` defined and set to 1, and with Run-time error checks
enabled with the `/RTC1` flag (this is the default in our source tree).
- Install ReactOS on this partition.
## What's being observed:
After reboot, some filesystem paths are accessed, and the code inside the
`#ifdef EXT2_HTREE_INDEX` block is taken (in ext2/src/dirctl.c#L777-L794).
For some reasons, the retrieved `rc` doesn't get the "expected" value and
the `goto errorout;` path is taken. After this label, `FileIndex` was
reset to `ByteOffset`, which remained uninitialized.
A bugcheck ensues because of the failed check (usage of uninitialized variable).