[3.19.y-ckt stable] Patch "iwlwifi: mvm: Free fw_status after use to avoid memory leak" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    iwlwifi: mvm: Free fw_status after use to avoid memory leak

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.8-ckt3.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From b0e6032cfd9ecfe6c29d485c0f729677b17f442f Mon Sep 17 00:00:00 2001
From: Haim Dreyfuss <haim.dreyfuss at intel.com>
Date: Wed, 20 May 2015 08:10:43 +0300
Subject: iwlwifi: mvm: Free fw_status after use to avoid memory leak

commit 2fc863a5143d64b8f06576cc3d7fd5622c5cf3b5 upstream.

fw_status is the only pointer pointing to a block of memory
allocated above and should be freed after use.
Note: this come from Klockwork static analyzer.

Fixes: 2021a89d7b8a ("iwlwifi: mvm: treat netdetect wake up separately")
Signed-off-by: Haim Dreyfuss <haim.dreyfuss at intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach at intel.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/net/wireless/iwlwifi/mvm/d3.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/iwlwifi/mvm/d3.c b/drivers/net/wireless/iwlwifi/mvm/d3.c
index 744de26..9e564fb 100644
--- a/drivers/net/wireless/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/iwlwifi/mvm/d3.c
@@ -1711,8 +1711,10 @@ static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
 	int i, j, n_matches, ret;

 	fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
-	if (!IS_ERR_OR_NULL(fw_status))
+	if (!IS_ERR_OR_NULL(fw_status)) {
 		reasons = le32_to_cpu(fw_status->wakeup_reasons);
+		kfree(fw_status);
+	}

 	if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
 		wakeup.rfkill_release = true;
--
1.9.1