linux-kernel - [PATCH] block: elevator.c: Cleaning up missing null-terminate in conjunction with strncpy

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Date:	Sun, 27 Jul 2014 01:15:41 +0200
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
Subject: [PATCH] block: elevator.c:  Cleaning up missing null-terminate in conjunction with strncpy

Replacing strncpy with strlcpy to avoid strings that lacks null terminate.
And set a string to be empty from the start.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 block/elevator.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/elevator.c b/block/elevator.c
index 24c28b6..ad17774 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -118,7 +118,7 @@ static struct elevator_type *elevator_get(const char *name, bool try_loading)
 	return e;
 }
 
-static char chosen_elevator[ELV_NAME_MAX];
+static char chosen_elevator[ELV_NAME_MAX] = "";
 
 static int __init elevator_setup(char *str)
 {
@@ -126,7 +126,7 @@ static int __init elevator_setup(char *str)
 	 * Be backwards-compatible with previous kernels, so users
 	 * won't get the wrong elevator.
 	 */
-	strncpy(chosen_elevator, str, sizeof(chosen_elevator) - 1);
+	strlcpy(chosen_elevator, str, sizeof(chosen_elevator));
 	return 1;
 }
 
-- 
1.7.10.4

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