[PATCH v2 10/25] ext4: propagate errors from ext4_find_extent() in ext4_insert_range()

[libaokun]

From: Baokun Li <libaokun1@xxxxxxxxxx>

Even though ext4_find_extent() returns an error, ext4_insert_range() still
returns 0. This may confuse the user as to why fallocate returns success,
but the contents of the file are not as expected. So propagate the error
returned by ext4_find_extent() to avoid inconsistencies.

Fixes: 331573febb6a ("ext4: Add support FALLOC_FL_INSERT_RANGE for fallocate")
Cc: stable@xxxxxxxxxx
Signed-off-by: Baokun Li <libaokun1@xxxxxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Reviewed-by: Ojaswin Mujoo <ojaswin@xxxxxxxxxxxxx>
Tested-by: Ojaswin Mujoo <ojaswin@xxxxxxxxxxxxx>
---
 fs/ext4/extents.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 5e760d1a0eff..1c1c7c39ceaa 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -5577,6 +5577,7 @@ static int ext4_insert_range(struct file *file, loff_t offset, loff_t len)
 	path = ext4_find_extent(inode, offset_lblk, NULL, 0);
 	if (IS_ERR(path)) {
 		up_write(&EXT4_I(inode)->i_data_sem);
+		ret = PTR_ERR(path);
 		goto out_stop;
 	}
 
-- 
2.39.2