Patchwork [3.5.y.z,extended,stable] Patch "mac80211: fix SSID copy on IBSS JOIN" has been added to staging queue

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Submitter Herton Ronaldo Krzesinski
Date Dec. 5, 2012, 10:29 p.m.
Message ID <1354746591-20905-1-git-send-email-herton.krzesinski@canonical.com>
Download mbox | patch
Permalink /patch/203991/
State New
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Comments

Herton Ronaldo Krzesinski - Dec. 5, 2012, 10:29 p.m.
This is a note to let you know that I have just added a patch titled

    mac80211: fix SSID copy on IBSS JOIN

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;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
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Herton

------

From 29c54281f1f69c88924ebbe2a70d5b67e2aa2567 Mon Sep 17 00:00:00 2001
From: Antonio Quartulli <ordex@autistici.org>
Date: Fri, 26 Oct 2012 18:54:25 +0200
Subject: [PATCH] mac80211: fix SSID copy on IBSS JOIN
X-Extended-Stable: 3.5

commit badecb001a310408d3473b1fc2ed5aefd0bc92a9 upstream.

The 'ssid' field of the cfg80211_ibss_params is a u8 pointer and
its length is likely to be less than IEEE80211_MAX_SSID_LEN most
of the time.

This patch fixes the ssid copy in ieee80211_ibss_join() by using
the SSID length to prevent it from reading beyond the string.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
[rewrapped commit message, small rewording]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
---
 net/mac80211/ibss.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--
1.7.9.5

Patch

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 33d9d0c..ebf6425 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -1111,7 +1111,7 @@  int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 	sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH;
 	sdata->u.ibss.ibss_join_req = jiffies;

-	memcpy(sdata->u.ibss.ssid, params->ssid, IEEE80211_MAX_SSID_LEN);
+	memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len);
 	sdata->u.ibss.ssid_len = params->ssid_len;

 	mutex_unlock(&sdata->u.ibss.mtx);