lkml.org 
[lkml]   [2024]   [Apr]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] ACPICA: debugger: dbconvert: add a null pointer check
Date
The memory allocation function ACPI_ALLOCATE_ZEROED does not guarantee a
successful allocation, but the subsequent code directly dereferences the
pointer that receives it, which may lead to null pointer dereference.

To fix this issue, a null pointer check should be added. If it is null,
return exception code AE_NO_MEMORY.

Fixes: 995751025572 ("ACPICA: Linuxize: Export debugger files to Linux")
Signed-off-by: Huai-Yuan Liu <qq810974084@gmail.com>
---
drivers/acpi/acpica/dbconvert.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/acpi/acpica/dbconvert.c b/drivers/acpi/acpica/dbconvert.c
index 2b84ac093698..8dbab6932049 100644
--- a/drivers/acpi/acpica/dbconvert.c
+++ b/drivers/acpi/acpica/dbconvert.c
@@ -174,6 +174,8 @@ acpi_status acpi_db_convert_to_package(char *string, union acpi_object *object)
elements =
ACPI_ALLOCATE_ZEROED(DB_DEFAULT_PKG_ELEMENTS *
sizeof(union acpi_object));
+ if (!elements)
+ return (AE_NO_MEMORY);

this = string;
for (i = 0; i < (DB_DEFAULT_PKG_ELEMENTS - 1); i++) {
--
2.34.1

\
 
 \ /
  Last update: 2024-05-27 16:20    [W:0.060 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site