[PATCH 8/9] btrfs: handle a NULL folio in extent_range_redirty_for_io

[Christoph Hellwig <hch@xxxxxx>]

filemap_get_folio can return NULL, skip those cases.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 fs/btrfs/extent_io.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index d55e4531ffd212..a54d2cf74ba020 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -230,6 +230,8 @@ void extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end)
 
 	while (index <= end_index) {
 		folio = filemap_get_folio(mapping, index);
+		if (!folio)
+			continue;
 		filemap_dirty_folio(mapping, folio);
 		folio_account_redirty(folio);
 		index += folio_nr_pages(folio);
-- 
2.39.0