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lib/string_helpers: drop redundant allocation in kasprintf_strarray

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kasprintf_strarray() returns an array of N strings and kfree_strarray()
also frees N entries.  However, kasprintf_strarray() currently allocates
N+1 char pointers.  Allocate exactly N pointers instead of N+1.

Also update the kernel-doc for @n.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20260415122542.370926-4-thorsten.blum@linux.dev
Signed-off-by: Kees Cook <kees@kernel.org>
This commit is contained in:
Thorsten Blum
2026-04-15 14:25:43 +02:00
committed by Kees Cook
parent e0251b5e07
commit 233e1ab980
1 changed files with 2 additions and 2 deletions
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4
lib/string_helpers.c
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@@ -752,7 +752,7 @@ EXPORT_SYMBOL_GPL(kstrdup_and_replace);
* kasprintf_strarray - allocate and fill array of sequential strings
* @gfp: flags for the slab allocator
* @prefix: prefix to be used
* @n: amount of lines to be allocated and filled
* @n: number of strings to be allocated and filled
*
* Allocates and fills @n strings using pattern "%s-%zu", where prefix
* is provided by caller. The caller is responsible to free them with
@@ -765,7 +765,7 @@ char **kasprintf_strarray(gfp_t gfp, const char *prefix, size_t n)
char **names;
size_t i;
names = kcalloc(n + 1, sizeof(char *), gfp);
names = kcalloc(n, sizeof(char *), gfp);
if (!names)
return NULL;