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| author | Ruiyu Ni <ruiyu.ni@intel.com> | 2015-09-09 07:50:09 +0000 |
|---|---|---|
| committer | hwu1225 <hwu1225@Edk2> | 2015-09-09 07:50:09 +0000 |
| commit | c9d0fe0817a87313a28b800e001ecf2b5d4bbb5a (patch) | |
| tree | b094fa873e225de6db7e6388e4be5124b4bf75ff /MdeModulePkg/Library | |
| parent | bcb9fdb5baeb9d9df6ad391129e95027d0f645cc (diff) | |
| download | edk2-platforms-c9d0fe0817a87313a28b800e001ecf2b5d4bbb5a.tar.xz | |
MdeModulePkg: Fix a performance data buffer overrun issue
The mBmPerfHeader.Count isn't reset to 0 in BmWriteBootToOsPerformanceData()
so when the actual performance data entry count exceeds the LimitCount,
the performance data collection breaks on condition
if (mBmPerfHeader.Count == LimitCount), but 2nd time calling this function
will not break on condition if (mBmPerfHeader.Count == LimitCount) because
the mBmPerfHeader.Count always bigger than LimitCount, which results buffer
overrun.
(Sync patch r18417 from main trunk.)
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/branches/UDK2015@18420 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Library')
| -rw-r--r-- | MdeModulePkg/Library/UefiBootManagerLib/BmPerformance.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/MdeModulePkg/Library/UefiBootManagerLib/BmPerformance.c b/MdeModulePkg/Library/UefiBootManagerLib/BmPerformance.c index 7b13ec663c..e45c0bd23a 100644 --- a/MdeModulePkg/Library/UefiBootManagerLib/BmPerformance.c +++ b/MdeModulePkg/Library/UefiBootManagerLib/BmPerformance.c @@ -186,6 +186,11 @@ BmWriteBootToOsPerformanceData ( PERF_END(NULL, "BDS", NULL, 0);
//
+ // Reset the entry count
+ //
+ mBmPerfHeader.Count = 0;
+
+ //
// Retrieve time stamp count as early as possible
//
Ticker = GetPerformanceCounter ();
|