Patch "ath5k: fix memory leak on buf on failed eeprom read" has been added to the 4.4-stable tree

Patch "ath5k: fix memory leak on buf on failed eeprom read" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ath5k: fix memory leak on buf on failed eeprom read

to the 4.4-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:
     ath5k-fix-memory-leak-on-buf-on-failed-eeprom-read.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Tue Apr 10 10:31:53 CEST 2018
From: Colin Ian King <colin.king@canonical.com>
Date: Wed, 3 May 2017 15:26:00 +0100
Subject: ath5k: fix memory leak on buf on failed eeprom read

From: Colin Ian King <colin.king@canonical.com>


[ Upstream commit 8fed6823e06e43ee9cf7c0ffecec2f9111ce6201 ]

The AR5K_EEPROM_READ macro returns with -EIO if a read error
occurs causing a memory leak on the allocated buffer buf. Fix
this by explicitly calling ath5k_hw_nvram_read and exiting on
the via the freebuf label that performs the necessary free'ing
of buf when a read error occurs.

Detected by CoverityScan, CID#1248782 ("Resource Leak")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/wireless/ath/ath5k/debug.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/ath/ath5k/debug.c
+++ b/drivers/net/wireless/ath/ath5k/debug.c
@@ -939,7 +939,10 @@ static int open_file_eeprom(struct inode
 	}
 
 	for (i = 0; i < eesize; ++i) {
-		AR5K_EEPROM_READ(i, val);
+		if (!ath5k_hw_nvram_read(ah, i, &val)) {
+			ret = -EIO;
+			goto freebuf;
+		}
 		buf[i] = val;
 	}
 


Patches currently in stable-queue which might be from colin.king@canonical.com are

queue-4.4/wl1251-check-return-from-call-to-wl1251_acx_arp_ip_filter.patch
queue-4.4/netxen_nic-set-rcode-to-the-return-status-from-the-call-to-netxen_issue_cmd.patch
queue-4.4/btrfs-fix-incorrect-error-return-ret-being-passed-to-mapping_set_error.patch
queue-4.4/ath5k-fix-memory-leak-on-buf-on-failed-eeprom-read.patch