linux-kernel - [08/35] ath5k: fix memory leak when fewer than N_PD

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Date:	Fri, 08 Jul 2011 15:49:57 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Bob Copeland <me@...copeland.com>,
	"John W. Linville" <linville@...driver.com>
Subject: [08/35] ath5k: fix memory leak when fewer than N_PD_CURVES are in use

2.6.32-longterm review patch.  If anyone has any objections, please let us know.

------------------

From: "Eugene A. Shatokhin" <dame_eugene@...l.ru>

commit a0b8de350be458b33248e48b2174d9af8a4c4798 upstream.

We would free the proper number of curves, but in the wrong
slots, due to a missing level of indirection through
the pdgain_idx table.

It's simpler just to try to free all four slots, so do that.

Signed-off-by: Bob Copeland <me@...copeland.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/net/wireless/ath/ath5k/eeprom.c |    8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

--- a/drivers/net/wireless/ath/ath5k/eeprom.c
+++ b/drivers/net/wireless/ath/ath5k/eeprom.c
@@ -1588,14 +1588,12 @@ ath5k_eeprom_free_pcal_info(struct ath5k
 		if (!chinfo[pier].pd_curves)
 			continue;
 
-		for (pdg = 0; pdg < ee->ee_pd_gains[mode]; pdg++) {
+		for (pdg = 0; pdg < AR5K_EEPROM_N_PD_CURVES; pdg++) {
 			struct ath5k_pdgain_info *pd =
 					&chinfo[pier].pd_curves[pdg];
 
-			if (pd != NULL) {
-				kfree(pd->pd_step);
-				kfree(pd->pd_pwr);
-			}
+			kfree(pd->pd_step);
+			kfree(pd->pd_pwr);
 		}
 
 		kfree(chinfo[pier].pd_curves);


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