linux-kernel - [PATCH v1 1/1] kasan: Replace strreplace() with strchrnul()

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Message-Id: <20230628153342.53406-1-andriy.shevchenko@linux.intel.com>
Date:   Wed, 28 Jun 2023 18:33:42 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        kasan-dev@...glegroups.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/1] kasan: Replace strreplace() with strchrnul()

We don't need to traverse over the entire string and replace
occurrences of a character with '\0'. The first match will
suffice. Hence, replace strreplace() with strchrnul().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 mm/kasan/report_generic.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c
index 51a1e8a8877f..63a34eac4a8c 100644
--- a/mm/kasan/report_generic.c
+++ b/mm/kasan/report_generic.c
@@ -264,6 +264,7 @@ static void print_decoded_frame_descr(const char *frame_descr)
 	while (num_objects--) {
 		unsigned long offset;
 		unsigned long size;
+		char *p;
 
 		/* access offset */
 		if (!tokenize_frame_descr(&frame_descr, token, sizeof(token),
@@ -282,7 +283,7 @@ static void print_decoded_frame_descr(const char *frame_descr)
 			return;
 
 		/* Strip line number; without filename it's not very helpful. */
-		strreplace(token, ':', '\0');
+		p[strchrnul(token, ':') - token] = '\0';
 
 		/* Finally, print object information. */
 		pr_err(" [%lu, %lu) '%s'", offset, offset + size, token);
-- 
2.40.0.1.gaa8946217a0b