linux-kernel - [PATCH 3.12 122/155] dns_resolver: Null-terminate the right string

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Message-Id: <06362e356165790d25a92493fddb657f258aa05e.1428411004.git.jslaby@suse.cz>
Date:	Tue,  7 Apr 2015 14:51:31 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Ben Hutchings <ben@...adent.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 122/155] dns_resolver: Null-terminate the right string

From: Ben Hutchings <ben@...adent.org.uk>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 640d7efe4c08f06c4ae5d31b79bd8740e7f6790a upstream.

*_result[len] is parsed as *(_result[len]) which is not at all what we
want to touch here.

Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
Fixes: 84a7c0b1db1c ("dns_resolver: assure that dns_query() result is null-terminated")
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 net/dns_resolver/dns_query.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/dns_resolver/dns_query.c b/net/dns_resolver/dns_query.c
index ede0e2d7412e..2022b46ab38f 100644
--- a/net/dns_resolver/dns_query.c
+++ b/net/dns_resolver/dns_query.c
@@ -151,7 +151,7 @@ int dns_query(const char *type, const char *name, size_t namelen,
 		goto put;
 
 	memcpy(*_result, upayload->data, len);
-	*_result[len] = '\0';
+	(*_result)[len] = '\0';
 
 	if (_expiry)
 		*_expiry = rkey->expiry;
-- 
2.3.4

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