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params: Use size_add() for kmalloc()

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Prevent allocations from integer overflow by using size_add().

Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20231120151419.1661807-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Andy Shevchenko 2023-11-20 17:11:44 +02:00 committed by Kees Cook
parent fd0cd057a1
commit 0fc79cbc93
1 changed files with 2 additions and 1 deletions
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3
kernel/params.c
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@ -11,6 +11,7 @@
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/overflow.h>
#include <linux/slab.h>
#include <linux/ctype.h>
#include <linux/security.h>
@ -48,7 +49,7 @@ static void *kmalloc_parameter(unsigned int size)
{
struct kmalloced_param *p;
p = kmalloc(sizeof(*p) + size, GFP_KERNEL);
p = kmalloc(size_add(sizeof(*p), size), GFP_KERNEL);
if (!p)
return NULL;