REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2665
ReportDispatcher() is called by a software module to report a status code.
The interface is generic and can be called frequently throughout the boot
under various conditions. A certain set of conditions can cause the
currently implemented algorithm for resource exhaustion to fail. A sample
scenario:
1. ReportStatusCode() is called at a TPL higher than one of the registered
status code listeners making the call to the listener deferred until
TPL is lowered.
2. Additional calls to ReportStatusCode() occur, so the data buffer
continues to expand.
3. A call to ReportStatusCode() is made from within a memory allocation
call (e.g. CoreAllocatePoolPages ()) which is protected from re-
entrancy with mPoolMemoryLock. This will cause the ReallocatePool()
call in ReportDispatcher() to fail. Because the end pointer was already
moved to account for the data size, the end pointer is now moved
beyond the buffer and invalid.
This commit saves the original end pointer value into a local variable
called "FailSafeEndPointer" which tracks a safe end pointer to revert to
in the case the allocated buffer size (CallbackEntry->EndPointer -
CallbackEntry->StatusCodeDataBuffer) is still not large enough for the
data.
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Kun Qin <Kun.Qin@microsoft.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Reviewed-by: Dandan Bi <dandan.bi@intel.com>
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1969
ReportDispatcher() may be invoked with a NULL Data argument. When TPL is
less than TPL_HIGH_LEVEL and Data is NULL, the EFI_STATUS_CODE_DATA
structure inside RscData should be cleared so listeners will not receive
data from a previous operation.
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Kun Qin <Kun.Qin@microsoft.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Reviewed-by: Dandan Bi <dandan.bi@intel.com>
1. Do not use tab characters
2. No trailing white space in one line
3. All files must end with CRLF
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Michael Kubacki
Michael D Kinney
Liming Gao
li-elvin
hhtian
xli24