This is a note to let you know that I've just added the patch titled
mac80211/minstrel: fix NULL pointer dereference issue
to the 3.10-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:
mac80211-minstrel-fix-null-pointer-dereference-issue.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 5c9fc93bc9bc417418fc1b6366833ae6a07b804d Mon Sep 17 00:00:00 2001
From: Felix Fietkau <[email protected]>
Date: Mon, 15 Jul 2013 14:35:06 +0200
Subject: mac80211/minstrel: fix NULL pointer dereference issue
From: Felix Fietkau <[email protected]>
commit 5c9fc93bc9bc417418fc1b6366833ae6a07b804d upstream.
When priv_sta == NULL, mi->prev_sample is dereferenced too early. Move
the assignment further down, after the rate_control_send_low call.
Reported-by: Krzysztof Mazur <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/mac80211/rc80211_minstrel.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -290,7 +290,7 @@ minstrel_get_rate(void *priv, struct iee
struct minstrel_rate *msr, *mr;
unsigned int ndx;
bool mrr_capable;
- bool prev_sample = mi->prev_sample;
+ bool prev_sample;
int delta;
int sampling_ratio;
@@ -314,6 +314,7 @@ minstrel_get_rate(void *priv, struct iee
(mi->sample_count + mi->sample_deferred / 2);
/* delta < 0: no sampling required */
+ prev_sample = mi->prev_sample;
mi->prev_sample = false;
if (delta < 0 || (!mrr_capable && prev_sample))
return;
Patches currently in stable-queue which might be from [email protected] are
queue-3.10/mac80211-minstrel-fix-null-pointer-dereference-issue.patch
queue-3.10/mac80211-minstrel_ht-fix-cck-rate-sampling.patch
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