+ relay-use-kasprintf-instead-of-fixed-buffer-formatting.patch added to mm-nonmm-unstable branch

+ relay-use-kasprintf-instead-of-fixed-buffer-formatting.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: relay: use kasprintf() instead of fixed buffer formatting
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     relay-use-kasprintf-instead-of-fixed-buffer-formatting.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/relay-use-kasprintf-instead-of-fixed-buffer-formatting.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: relay: use kasprintf() instead of fixed buffer formatting
Date: Mon, 17 Mar 2025 23:29:47 +0200

Improve readability and maintainability by replacing a hard coded string
allocation and formatting by using the kasprintf() helper.

It also eliminates the GCC compiler warning (with CONFIG_WERROR=y, which
is default, it becomes an error:

kernel/relay.c:357:42: error: `snprintf' output may be truncated before the last format character [-Werror=format-truncation=]

Link: https://lkml.kernel.org/r/20250317212948.1811176-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/relay.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/kernel/relay.c~relay-use-kasprintf-instead-of-fixed-buffer-formatting
+++ a/kernel/relay.c
@@ -351,10 +351,9 @@ static struct dentry *relay_create_buf_f
 	struct dentry *dentry;
 	char *tmpname;
 
-	tmpname = kzalloc(NAME_MAX + 1, GFP_KERNEL);
+	tmpname = kasprintf(GFP_KERNEL, "%s%d", chan->base_filename, cpu);
 	if (!tmpname)
 		return NULL;
-	snprintf(tmpname, NAME_MAX, "%s%d", chan->base_filename, cpu);
 
 	/* Create file in fs */
 	dentry = chan->cb->create_buf_file(tmpname, chan->parent,
_

Patches currently in -mm which might be from andriy.shevchenko@linux.intel.com are

resource-split-define_res_named_desc-out-of-define_res_named.patch
resource-replace-open-coded-variant-of-define_res_named_desc.patch
resource-replace-open-coded-variants-of-define_res__named.patch
resource-replace-open-coded-variant-of-define_res.patch
relay-use-kasprintf-instead-of-fixed-buffer-formatting.patch