linux-kernel - [PATCH] staging: lustre: lustre: ptlrpc: sec.c: Replacing strncat with strlcat to avoid overwrite size

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Date:	Sun, 12 Oct 2014 17:55:33 +0200
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Oleg Drokin <oleg.drokin@...el.com>
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Andreas Dilger <andreas.dilger@...el.com>,
	Andriy Skulysh <Andriy_Skulysh@...atex.com>,
	Liang Zhen <liang.zhen@...el.com>,
	Denis Pithon <denis.pithon@...il.com>,
	Chen Gang <gang.chen.5i5j@...il.com>,
	Patrick Farrell <paf@...y.com>,
	Masanari Iida <standby24x7@...il.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: lustre: lustre: ptlrpc: sec.c:  Replacing strncat with strlcat to avoid overwrite size

Changed from using strncat with strlcat to avoid overwrite the max size.
Take the opportunity to change a snprint to strlcpy.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 drivers/staging/lustre/lustre/ptlrpc/sec.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec.c b/drivers/staging/lustre/lustre/ptlrpc/sec.c
index 5cff7ee..d276e98 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec.c
@@ -209,7 +209,7 @@ EXPORT_SYMBOL(sptlrpc_flavor2name_bulk);
 
 char *sptlrpc_flavor2name(struct sptlrpc_flavor *sf, char *buf, int bufsize)
 {
-	snprintf(buf, bufsize, "%s", sptlrpc_flavor2name_base(sf->sf_rpc));
+	strlcpy(buf, sptlrpc_flavor2name_base(sf->sf_rpc), bufsize);
 
 	/*
 	 * currently we don't support customized bulk specification for
@@ -220,10 +220,9 @@ char *sptlrpc_flavor2name(struct sptlrpc_flavor *sf, char *buf, int bufsize)
 
 		bspec[0] = '-';
 		sptlrpc_flavor2name_bulk(sf, &bspec[1], sizeof(bspec) - 1);
-		strncat(buf, bspec, bufsize);
+		strlcat(buf, bspec, bufsize);
 	}
 
-	buf[bufsize - 1] = '\0';
 	return buf;
 }
 EXPORT_SYMBOL(sptlrpc_flavor2name);
-- 
1.7.10.4

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