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| author | Paulo Alcantara <pcacjr@zytor.com> | 2017-09-12 04:30:23 +0300 |
|---|---|---|
| committer | Star Zeng <star.zeng@intel.com> | 2017-09-15 04:38:05 +0300 |
| commit | 11b4463e096523fe03ac840472d483652ae93904 (patch) | |
| tree | b667c532c7f5a12b83dc908389ebaf8c82927198 /BaseTools/Source/Python/Ecc/Database.py | |
| parent | 54537008a2f7d4e8a35507af8b523e7b678abacd (diff) | |
| download | edk2-11b4463e096523fe03ac840472d483652ae93904.tar.xz | |
MdeModulePkg/UdfDxe: Fix NULL pointer dereference
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=704
For root directory, the FID (File Identifier Descriptor) pointer is
accessible through PRIVATE_UDF_FILE_DATA.Root, whereas non-root
directory and regular files, their FIDs are accessible through
PRIVATE_UDF_FILE_DATA.File.
In UdfSetPosition(), the FID was retrieved through
PRIVATE_UDF_FILE_DATA.File, hence when calling it with a root directory,
PRIVATE_UDF_FILE_DATA.File.FileIdentifierDescriptor would be NULL and
then dereferenced.
This patch fixes the NULL pointer dereference by calling _FILE() to
transparently return the correct UDF_FILE_INFO * which points to a valid
FID descriptor of a specific file.
Cc: Star Zeng <star.zeng@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Steven Shi <steven.shi@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Reported-by: Steven Shi <steven.shi@intel.com>
Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Diffstat (limited to 'BaseTools/Source/Python/Ecc/Database.py')
0 files changed, 0 insertions, 0 deletions