audk/MdeModulePkg
Hao Wu 68099b52b0 MdeModulePkg/UdfDxe: Avoid possible use of already-freed data
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1255

For function ReadFile():

If the line

  Status = GetAedAdsData (
   ...
   );

is reached multiple times during the 'for' loop, freeing the data pointed
by variable 'Data' may potentially lead to variable 'Ad' referencing the
already-freed data.

After calling function GetAllocationDescriptor(), 'Data' and 'Ad' may
point to the same memory (with some possible offset). Hence, this commit
will move the FreePool() call backwards to ensure the data will no longer
be used.

Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Paulo Alcantara <palcantara@suse.de>
Acked-by: Star Zeng <star.zeng@intel.com>
2018-10-23 14:25:04 +08:00
..
Application MdeModulePkg CapsuleApp:Remove two redundant Guids 2018-09-21 11:34:42 +08:00
Bus MdeModulePkg Xhci: Handle value 5 in Port Speed field of PORTSC 2018-10-23 11:17:32 +08:00
Core MdeModulePkg/DxeIpl: support more NX related PCDs 2018-09-26 08:55:10 +08:00
Include MdeModulePkg: Removing ipf which is no longer supported from edk2. 2018-09-06 15:25:16 +08:00
Library MdeModulePkg BrotliDecompressLib: Add the checker to avoid array out of bound 2018-10-19 08:21:47 +08:00
Logo MdeModulePkg: Removing ipf which is no longer supported from edk2. 2018-09-06 15:25:16 +08:00
Universal MdeModulePkg/UdfDxe: Avoid possible use of already-freed data 2018-10-23 14:25:04 +08:00
MdeModulePkg.dec MdeModulePkg/MdeModulePkg.dec/.uni: clarify PCDs usage 2018-09-26 08:55:09 +08:00
MdeModulePkg.dsc MdeModulePkg BrotliCustomDecompressLib: Don't build it for EBC arch 2018-10-15 15:55:55 +08:00
MdeModulePkg.uni MdeModulePkg/MdeModulePkg.dec/.uni: clarify PCDs usage 2018-09-26 08:55:09 +08:00
MdeModulePkgExtra.uni MdeModulePkg: Clean up source files 2018-06-28 11:19:45 +08:00