linux-kernel - [PATCH 4.2.y-ckt 224/305] mtd: ubi: don't leak e if schedule

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Date:	Fri, 15 Jan 2016 16:00:38 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Richard Weinberger <richard@....at>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 4.2.y-ckt 224/305] mtd: ubi: don't leak e if schedule_erase() fails

4.2.8-ckt2 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Sebastian Siewior <bigeasy@...utronix.de>

commit 6b238de189f69dc77d660d4cce62eed15547f4c3 upstream.

If __erase_worker() fails to erase the EB and schedule_erase() fails as
well to do anything about it then we go RO. But that is not a reason to
leak the e argument here. Therefore clean up e.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Richard Weinberger <richard@....at>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/mtd/ubi/wl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index f73233f..5606563 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -1060,6 +1060,7 @@ static int __erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk)
 		/* Re-schedule the LEB for erasure */
 		err1 = schedule_erase(ubi, e, vol_id, lnum, 0);
 		if (err1) {
+			wl_entry_destroy(ubi, e);
 			err = err1;
 			goto out_ro;
 		}
-- 
1.9.1