From: Willy Tarreau <w@1wt.eu>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Pavel Roskin <proski@gnu.org>,
Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>,
"John W. Linville" <linville@tuxdriver.com>
Subject: [ 08/12] mac80211: zero initialize count field in ieee80211_tx_rate
Date: Mon, 12 Mar 2012 01:20:53 +0100 [thread overview]
Message-ID: <20120312002046.282831520@1wt.eu> (raw)
In-Reply-To: <feb44625a10a45049eddf27890e95d54@local>
2.6.32-longterm review patch. If anyone has any objections, please let me know.
------------------
From: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
commit 8617b093d0031837a7be9b32bc674580cfb5f6b5 upstream.
rate control algorithms concludes the rate as invalid
with rate[i].idx < -1 , while they do also check for rate[i].count is
non-zero. it would be safer to zero initialize the 'count' field.
recently we had a ath9k rate control crash where the ath9k rate control
in ath_tx_status assumed to check only for rate[i].count being non-zero
in one instance and ended up in using invalid rate index for
'connection monitoring NULL func frames' which eventually lead to the crash.
thanks to Pavel Roskin for fixing it and finding the root cause.
https://bugzilla.redhat.com/show_bug.cgi?id=768639
Cc: stable@vger.kernel.org
Cc: Pavel Roskin <proski@gnu.org>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index ad64f4d..f9b8e81 100644
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -344,7 +344,7 @@ void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
info->control.rates[i].idx = -1;
info->control.rates[i].flags = 0;
- info->control.rates[i].count = 1;
+ info->control.rates[i].count = 0;
}
if (sdata->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
next prev parent reply other threads:[~2012-03-12 0:20 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <feb44625a10a45049eddf27890e95d54@local>
2012-03-12 0:20 ` [ 00/12] 2.6.32.59-longterm review Willy Tarreau
2012-03-12 0:20 ` [ 01/12] compat: Re-add missing asm/compat.h include to fix compile breakage on s390 Willy Tarreau
2012-03-12 0:20 ` [ 02/12] Remove COMPAT_IA32 support Willy Tarreau
2012-03-12 1:07 ` Ben Hutchings
2012-03-12 2:49 ` Greg KH
2012-03-12 6:30 ` Willy Tarreau
2012-03-12 6:48 ` stripping [PATCH] without losing later tags from mailed patches (Re: [ 02/12] Remove COMPAT_IA32 support) Jonathan Nieder
2012-03-12 8:58 ` Willy Tarreau
2012-03-12 15:20 ` Greg KH
2012-03-12 15:24 ` Willy Tarreau
2012-03-12 16:41 ` Thomas Rast
2012-03-12 16:53 ` Willy Tarreau
2012-03-12 16:57 ` Jonathan Nieder
2012-03-12 18:04 ` Junio C Hamano
2012-03-12 18:50 ` Willy Tarreau
2012-03-12 18:54 ` Jonathan Nieder
2012-03-12 19:17 ` Willy Tarreau
2012-03-12 21:47 ` Thomas Rast
2012-03-12 21:56 ` [PATCH] git-am: error out when seeing -b/--binary Jonathan Nieder
2012-03-12 22:03 ` Thomas Rast
2012-03-12 22:22 ` Jonathan Nieder
2012-03-13 15:31 ` Thomas Rast
2012-03-13 17:31 ` Junio C Hamano
2012-03-13 17:51 ` Jonathan Nieder
2012-03-13 18:22 ` Junio C Hamano
2012-03-12 22:12 ` Junio C Hamano
2012-03-12 21:57 ` stripping [PATCH] without losing later tags from mailed patches (Re: [ 02/12] Remove COMPAT_IA32 support) Junio C Hamano
2012-03-12 16:40 ` Junio C Hamano
2012-03-12 16:48 ` Willy Tarreau
2012-03-12 17:57 ` Junio C Hamano
2012-03-12 18:45 ` Willy Tarreau
2012-03-12 19:29 ` Junio C Hamano
2012-03-12 17:12 ` Greg KH
2012-03-12 18:01 ` Junio C Hamano
2012-03-12 19:26 ` Greg KH
2012-03-12 19:51 ` Junio C Hamano
2012-03-12 20:19 ` Willy Tarreau
2012-03-12 15:25 ` [ 02/12] Remove COMPAT_IA32 support Ben Hutchings
2012-03-12 17:02 ` Arnd Bergmann
2012-03-12 17:14 ` Willy Tarreau
2012-03-12 19:34 ` Ben Hutchings
2012-03-12 19:45 ` Willy Tarreau
2012-03-12 0:20 ` [ 03/12] writeback: fixups for !dirty_writeback_centisecs Willy Tarreau
2012-03-12 0:20 ` [ 04/12] bsg: fix sysfs link remove warning Willy Tarreau
2012-03-12 0:20 ` [ 05/12] eCryptfs: Handle failed metadata read in lookup Willy Tarreau
2012-03-12 0:20 ` [ 06/12] [S390] KEYS: Enable the compat keyctl wrapper on s390x Willy Tarreau
2012-03-12 0:20 ` [ 07/12] cifs: fix dentry refcount leak when opening a FIFO on lookup Willy Tarreau
2012-03-12 0:20 ` Willy Tarreau [this message]
2012-03-12 1:57 ` [ 08/12] mac80211: zero initialize count field in ieee80211_tx_rate Ben Hutchings
2012-03-12 4:36 ` Mohammed Shafi Shajakhan
2012-03-12 6:34 ` Willy Tarreau
2012-03-12 6:52 ` Mohammed Shafi Shajakhan
2012-03-12 15:23 ` Ben Hutchings
2012-03-12 15:55 ` Mohammed Shafi Shajakhan
2012-03-12 16:10 ` Mohammed Shafi Shajakhan
2012-03-12 6:31 ` Willy Tarreau
2012-03-12 0:20 ` [ 09/12] net/usbnet: avoid recursive locking in usbnet_stop() Willy Tarreau
2012-03-12 0:20 ` [ 10/12] regset: Prevent null pointer reference on readonly regsets Willy Tarreau
2012-03-12 0:20 ` [ 11/12] regset: Return -EFAULT, not -EIO, on host-side memory fault Willy Tarreau
2012-03-12 0:20 ` [ 12/12] watchdog: hpwdt: clean up set_memory_x call for 32 bit Willy Tarreau
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