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isdn: icn: Fix potentially wrong string handling 

This warning was reported by cppcheck:
drivers/isdn/icn/icn.c:1641: error: Dangerous usage of 'rev' (strncpy doesn't always 0-terminate it)

If strncpy copied 20 bytes, the destination string rev was not terminated.
The patch adds one more byte to rev and makes sure that this byte is
always 0.

Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Tejun Heo <tj@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefan Weil 2011-01-30 10:31:26 +00:00 committed by David S. Miller
parent d9c8f498c3
commit a29ae23f68
1 changed files with 2 additions and 1 deletions
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3
drivers/isdn/icn/icn.c
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@ -1627,7 +1627,7 @@ __setup("icn=", icn_setup);
static int __init icn_init(void)
{
char *p;
char rev[20];
char rev[21];
memset(&dev, 0, sizeof(icn_dev));
dev.memaddr = (membase & 0x0ffc000);
@ -1638,6 +1638,7 @@ static int __init icn_init(void)
if ((p = strchr(revision, ':'))) {
strncpy(rev, p + 1, 20);
rev[20] = '\0';
p = strchr(rev, '$');
if (p)
*p = 0;