Check if SlitSystemLocalityCount pointer has been successfully updated
before it is used for further table parsing.
Signed-off-by: Krzysztof Koch <krzysztof.k...@arm.com>
---
Notes:
v3:
- Rebase on latest master [Krzysztof]
v1:
- Test against NULL pointers [Krzysztof]
ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Slit/SlitParser.c | 16
++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git
a/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Slit/SlitParser.c
b/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Slit/SlitParser.c
index
ca2808db526b1bbb79aeb21ccfc0ae6c79b2dfd8..17e2166a09d8615b714e0c51d4d93d293fcdf601
100644
--- a/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Slit/SlitParser.c
+++ b/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Slit/SlitParser.c
@@ -1,7 +1,7 @@
/** @file
SLIT table parser
- Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.
+ Copyright (c) 2016 - 2019, ARM Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
@@ -75,9 +75,21 @@ ParseAcpiSlit (
AcpiTableLength,
PARSER_PARAMS (SlitParser)
);
+
+ // Check if the values used to control the parsing logic have been
+ // successfully read.
+ if (SlitSystemLocalityCount == NULL) {
+ IncrementErrorCount ();
+ Print (
+ L"ERROR: Insufficient table length. AcpiTableLength = %d.\n",
+ AcpiTableLength
+ );
+ return;
+ }
+
LocalityPtr = Ptr + Offset;
-
LocalityCount = *SlitSystemLocalityCount;
+
// We only print the Localities if the count is less than 16
// If the locality count is more than 16 then refer to the
// raw data dump.
--
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'
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