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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	kasan-dev@googlegroups.com, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>,
	Alexander Potapenko <glider@google.com>,
	Andrey Konovalov <andreyknvl@gmail.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v1 1/1] kasan: Replace strreplace() with strchrnul()
Date: Wed, 28 Jun 2023 18:33:42 +0300	[thread overview]
Message-ID: <20230628153342.53406-1-andriy.shevchenko@linux.intel.com> (raw)

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@linux.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


             reply	other threads:[~2023-06-28 15:35 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-06-28 15:33 Andy Shevchenko [this message]
2023-06-28 15:39 ` [PATCH v1 1/1] kasan: Replace strreplace() with strchrnul() Alexander Potapenko
2023-06-29  9:22   ` Andy Shevchenko
2023-06-29 14:32 ` David Laight
2023-06-29 14:41   ` 'Andy Shevchenko'
2023-07-03 10:50 ` Andy Shevchenko
2023-07-19  5:36 ` kernel test robot

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