Patch "net: sctp: prevent writes to cookie_hmac_alg from accessing invalid memory" has been added to the 4.1-stable tree

This is a note to let you know that I've just added the patch titled

net: sctp: prevent writes to cookie_hmac_alg from accessing invalid memory

to the 4.1-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:
net-sctp-prevent-writes-to-cookie_hmac_alg-from-accessing-invalid-memory.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Sasha Levin <[email protected]>
Date: Thu, 7 Jan 2016 14:52:43 -0500
Subject: net: sctp: prevent writes to cookie_hmac_alg from accessing invalid memory

From: Sasha Levin <[email protected]>

[ Upstream commit 320f1a4a175e7cd5d3f006f92b4d4d3e2cbb7bb5 ]

proc_dostring() needs an initialized destination string, while the one provided in proc_sctp_do_hmac_alg() contains stack garbage.

Thus, writing to cookie_hmac_alg would strlen() that garbage and end up accessing invalid memory.

---
 net/sctp/sysctl.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -320,7 +320,7 @@ static int proc_sctp_do_hmac_alg(struct
 	struct ctl_table tbl;
 	bool changed = false;
 	char *none = "none";
-	char tmp[8];
+	char tmp[8] = {0};
 	int ret;
 
 	memset(&tbl, 0, sizeof(struct ctl_table));

Patches currently in stable-queue which might be from [email protected] are

queue-4.1/net-sctp-prevent-writes-to-cookie_hmac_alg-from-accessing-invalid-memory.patch queue-4.1/addrconf-always-initialize-sysctl-table-data.patch