From: Josef Bacik <josef@redhat.com>
Date: Tue, 15 Mar 2011 18:52:12 +0000 (-0400)
Subject: Btrfs: return error if the range we want to map is bogus
X-Git-Tag: v2.6.39-rc1~19^2~32
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=850265335f792f5d39ab24e5fb7160bac28d77e5;p=karo-tx-linux.git

Btrfs: return error if the range we want to map is bogus

Currently if we have corrupt metadata map_extent_buffer will complain about it,
but not return an error so the caller has no idea a problem was hit.  Fix this.
Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
---

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 714adc4ac4c2..1bbd26b4fc5c 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3690,6 +3690,7 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long start,
 		       "wanted %lu %lu\n", (unsigned long long)eb->start,
 		       eb->len, start, min_len);
 		WARN_ON(1);
+		return -EINVAL;
 	}
 
 	p = extent_buffer_page(eb, i);