From: Nikolay Borisov <nborisov@xxxxxxxx>
This patch has been added to the 4.1 stable tree. If you have any
objections, please let us know.
===============
[ Upstream commit f3038ee3a3f1017a1cbe9907e31fa12d366c5dcb ]
This function was introduced by 247e743cbe6e ("Btrfs: Use async helpers
to deal with pages that have been improperly dirtied") and it didn't do
any error handling then. This function might very well fail in ENOMEM
situation, yet it's not handled, this could lead to inconsistent state.
So let's handle the failure by setting the mapping error bit.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Nikolay Borisov <nborisov@xxxxxxxx>
Reviewed-by: Qu Wenruo <wqu@xxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
fs/btrfs/inode.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index d14af5bd13d6..1423231c7e49 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1999,7 +1999,15 @@ static void btrfs_writepage_fixup_worker(struct btrfs_work *work)
goto out;
}
- btrfs_set_extent_delalloc(inode, page_start, page_end, &cached_state);
+ ret = btrfs_set_extent_delalloc(inode, page_start, page_end,
+ &cached_state);
+ if (ret) {
+ mapping_set_error(page->mapping, ret);
+ end_extent_writepage(page, ret, page_start, page_end);
+ ClearPageChecked(page);
+ goto out;
+ }
+
ClearPageChecked(page);
set_page_dirty(page);
out:
--
2.14.1