Patchwork [3.5.y.z,extended,stable] Patch "net: sctp: sctp_setsockopt_auth_key: use kzfree instead of" has been added to staging queue

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Submitter Herton Ronaldo Krzesinski
Date Feb. 15, 2013, 3:11 a.m.
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Download mbox | patch
Permalink /patch/220606/
State New
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Herton Ronaldo Krzesinski - Feb. 15, 2013, 3:11 a.m.
This is a note to let you know that I have just added a patch titled

    net: sctp: sctp_setsockopt_auth_key: use kzfree instead of

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see



From 8d1c0152028e2eb8f1434d8471ada07d4bbd68c3 Mon Sep 17 00:00:00 2001
From: Daniel Borkmann <>
Date: Fri, 8 Feb 2013 03:04:34 +0000
Subject: [PATCH] net: sctp: sctp_setsockopt_auth_key: use kzfree instead of

commit 6ba542a291a5e558603ac51cda9bded347ce7627 upstream.

In sctp_setsockopt_auth_key, we create a temporary copy of the user
passed shared auth key for the endpoint or association and after
internal setup, we free it right away. Since it's sensitive data, we
should zero out the key before returning the memory back to the
allocator. Thus, use kzfree instead of kfree, just as we do in

Signed-off-by: Daniel Borkmann <>
Signed-off-by: David S. Miller <>
Signed-off-by: Herton Ronaldo Krzesinski <>
 net/sctp/socket.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)



diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 944cfce..957bb6e 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3375,7 +3375,7 @@  static int sctp_setsockopt_auth_key(struct sock *sk,

 	ret = sctp_auth_set_key(sctp_sk(sk)->ep, asoc, authkey);
-	kfree(authkey);
+	kzfree(authkey);
 	return ret;