From 7be081539e540517d5e1fcbf96b8080074afbf08 Mon Sep 17 00:00:00 2001 From: Gabor Juhos 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 Acked-by: Gertjan van Wingerde Acked-by: Ivo van Doorn Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2x00dev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c index c3e1aa7c1a80..d2a1ea98d0f2 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. -- 2.30.2