This is a note to let you know that I've just added the patch titled
dns_resolver: assure that dns_query() result is null-terminated
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dns_resolver-assure-that-dns_query-result-is-null-terminated.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Sat Jul 26 10:02:43 PDT 2014
From: =?UTF-8?q?Manuel=20Sch=C3=B6lling?= <manuel.schoelling@xxxxxx>
Date: Sat, 7 Jun 2014 23:57:25 +0200
Subject: dns_resolver: assure that dns_query() result is null-terminated
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From: =?UTF-8?q?Manuel=20Sch=C3=B6lling?= <manuel.schoelling@xxxxxx>
[ Upstream commit 84a7c0b1db1c17d5ded8d3800228a608e1070b40 ]
dns_query() credulously assumes that keys are null-terminated and
returns a copy of a memory block that is off by one.
Signed-off-by: Manuel Schölling <manuel.schoelling@xxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/dns_resolver/dns_query.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/net/dns_resolver/dns_query.c
+++ b/net/dns_resolver/dns_query.c
@@ -150,7 +150,9 @@ int dns_query(const char *type, const ch
if (!*_result)
goto put;
- memcpy(*_result, upayload->data, len + 1);
+ memcpy(*_result, upayload->data, len);
+ *_result[len] = '\0';
+
if (_expiry)
*_expiry = rkey->expiry;
Patches currently in stable-queue which might be from manuel.schoelling@xxxxxx are
queue-3.4/dns_resolver-assure-that-dns_query-result-is-null-terminated.patch
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