linux-kernel - [PATCH v2] kernel: debug: kdb: strncpy issue, using strlcpy instead of strncpy

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Message-ID: <5194C6AF.1020304@asianux.com>
Date:	Thu, 16 May 2013 19:44:47 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	jason.wessel@...driver.com
CC:	kgdb-bugreport@...ts.sourceforge.net,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] kernel: debug: kdb: strncpy issue, using strlcpy instead
 of strncpy


'kdb_prompt_str' is NUL terminated string, need always set '\0' at the
end.

Or kdb_printf() below will cause issue.


Signed-off-by: Chen Gang <gang.chen@...anux.com>
---
 kernel/debug/kdb/kdb_io.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/debug/kdb/kdb_io.c b/kernel/debug/kdb/kdb_io.c
index 14ff484..932b436 100644
--- a/kernel/debug/kdb/kdb_io.c
+++ b/kernel/debug/kdb/kdb_io.c
@@ -442,7 +442,7 @@ poll_again:
 char *kdb_getstr(char *buffer, size_t bufsize, char *prompt)
 {
 	if (prompt && kdb_prompt_str != prompt)
-		strncpy(kdb_prompt_str, prompt, CMD_BUFLEN);
+		strlcpy(kdb_prompt_str, prompt, CMD_BUFLEN);
 	kdb_printf(kdb_prompt_str);
 	kdb_nextline = 1;	/* Prompt and input resets line number */
 	return kdb_read(buffer, bufsize);
-- 
1.7.7.6
--
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