Commit Graph

3 Commits

Author SHA1 Message Date
Leif Lindholm 2ad9cf37a4 MdePkg: ensure SafeString length functions don't access beyond MaxSize
The StrnLenS and AsciiStrnLenS functions, when presented with a string
with no terminating NULL in the first MaxSize characters will check
the character at String[MaxSize] before checking if Length < MaxSize.
(They return the correct value, but have accessed beyond the stated
limit in the process.)

Flip the order of the tests to prevent this behaviour.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17936 6f19259b-4bc3-4df7-8a09-765794883524
2015-07-13 11:35:28 +00:00
Yao, Jiewen 0e93edbbc0 Add ASSERT comment for SafeString API in BaseLib for MdePkg.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: "Yao, Jiewen" <Jiewen.Yao@intel.com> 
Reviewed-by: "Carsey, Jaben" <jaben.carsey@intel.com>
Reviewed-by: "Justen, Jordan L" <jordan.l.justen@intel.com>
Reviewed-by: "Gao, Liming" <Liming.Gao@intel.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17310 6f19259b-4bc3-4df7-8a09-765794883524
2015-05-06 00:46:51 +00:00
jyao1 c058d59f40 Add safe string function to base lib.
Contributed-under: TianoCore Contribution Agreement 1.0

signed off by: Yao, Jiewen <jiewen.yao@intel.com>
reviewed by: Ni, Ruiyu <ruiyu.ni@intel.com>
reviewed by: Long, Qin <qin.long@intel.com>
reviewed by: Kinney, Michael D <michael.d.kinney@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16312 6f19259b-4bc3-4df7-8a09-765794883524
2014-11-07 13:43:05 +00:00