From 7be081539e540517d5e1fcbf96b8080074afbf08 Mon Sep 17 00:00:00 2001
From: Gabor Juhos <juhosg@openwrt.org>
Date: Thu, 16 Feb 2012 20:44:59 +0100
Subject: [PATCH] rt2x00: fix a possible NULL pointer dereference
The 'rt2x00lib_probe_dev' function tries to
allocate the workqueue. If the allocation
fails, 'rt2x00_lib_remove_dev' is called on
the error path. Because 'rt2x00dev->workqueue'
is NULL in this case, the 'destroy_workqueue'
call will cause a NULL pointer dereference.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/rt2x00/rt2x00dev.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index c3e1aa7..d2a1ea9 100644
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -1220,7 +1220,8 @@ void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
cancel_work_sync(&rt2x00dev->rxdone_work);
cancel_work_sync(&rt2x00dev->txdone_work);
}
- destroy_workqueue(rt2x00dev->workqueue);
+ if (rt2x00dev->workqueue)
+ destroy_workqueue(rt2x00dev->workqueue);
/*
* Free the tx status fifo.
--
1.7.4.4