From: Chris Mason <chris.mason@oracle.com>
Date: Fri, 4 Nov 2011 02:23:13 +0000 (-0400)
Subject: Btrfs: fix extent_buffer leak in the metadata IO error handling
X-Git-Tag: firefly_0821_release~3680^2~3894^2~60
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c674e04e1cd6049715e7b9446790f4b441e547c0;p=firefly-linux-kernel-4.4.55.git

Btrfs: fix extent_buffer leak in the metadata IO error handling

The scrub readahead branch brought in a new error handling hook,
but it was leaking extent_buffer references.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 0eb1f0951251..40a62b980087 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -644,6 +644,7 @@ static int btree_io_failed_hook(struct bio *failed_bio,
 		clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags);
 		btree_readahead_hook(root, eb, eb->start, -EIO);
 	}
+	free_extent_buffer(eb);
 
 out:
 	return -EIO;	/* we fixed nothing */