From: Martin Wilck <mwilck@suse.com>
Date: Wed, 25 Jul 2018 21:15:08 +0000 (+0200)
Subject: blkdev: __blkdev_direct_IO_simple: fix leak in error case
X-Git-Tag: v4.17.12~40
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=93ba679354cf9a9a6a9ea9b62cad227e1b71ac09;p=thirdparty%2Fkernel%2Fstable.git

blkdev: __blkdev_direct_IO_simple: fix leak in error case

commit 9362dd1109f87a9d0a798fbc890cb339c171ed35 upstream.

Fixes: 72ecad22d9f1 ("block: support a full bio worth of IO for simplified bdev direct-io")
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 7ec920e270656..9bfece2e3c88f 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -219,7 +219,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
 
 	ret = bio_iov_iter_get_pages(&bio, iter);
 	if (unlikely(ret))
-		return ret;
+		goto out;
 	ret = bio.bi_iter.bi_size;
 
 	if (iov_iter_rw(iter) == READ) {
@@ -248,12 +248,13 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
 		put_page(bvec->bv_page);
 	}
 
-	if (vecs != inline_vecs)
-		kfree(vecs);
-
 	if (unlikely(bio.bi_status))
 		ret = blk_status_to_errno(bio.bi_status);
 
+out:
+	if (vecs != inline_vecs)
+		kfree(vecs);
+
 	bio_uninit(&bio);
 
 	return ret;