linux-kernel - [PATCH] fix a leak in bch_cached_dev

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Date:	Thu, 30 Oct 2014 05:42:09 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Kent Overstreet <kmo@...erainc.com>
Cc:	linux-kernel@...r.kernel.org, linux-bcache@...r.kernel.org
Subject: [PATCH] fix a leak in bch_cached_dev_run()

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -878,8 +878,11 @@ void bch_cached_dev_run(struct cached_dev *dc)
 	buf[SB_LABEL_SIZE] = '\0';
 	env[2] = kasprintf(GFP_KERNEL, "CACHED_LABEL=%s", buf);
 
-	if (atomic_xchg(&dc->running, 1))
+	if (atomic_xchg(&dc->running, 1)) {
+		kfree(env[1]);
+		kfree(env[2]);
 		return;
+	}
 
 	if (!d->c &&
 	    BDEV_STATE(&dc->sb) != BDEV_STATE_NONE) {
--
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