Forwarded: BUG: corrupted list in nilfs_lookup_dirty_data_buffers

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Subject: BUG: corrupted list in nilfs_lookup_dirty_data_buffers
Author: nico.antinori.7@xxxxxxxxx

#syz test

--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -741,6 +741,10 @@ static size_t nilfs_lookup_dirty_data_buffers(struct inode *inode,
 		do {
 			if (!buffer_dirty(bh) || buffer_async_write(bh))
 				continue;
+
+			if (list_empty(&bh->b_assoc_buffers))
+				continue;
+
 			get_bh(bh);
 			list_add_tail(&bh->b_assoc_buffers, listp);
 			ndirties++;