From: Hugh Dickins <[email protected]>
rsv_end is the last block within the reservation, so alloc_new_reservation
should accept start_block == rsv_end as success.
Signed-off-by: Mingming Cao <[email protected]>
Signed-off-by: Hugh Dickins <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
fs/ext4/balloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/ext4/balloc.c~ext4-balloc-fix-off-by-one-against-rsv_end fs/ext4/balloc.c
--- a/fs/ext4/balloc.c~ext4-balloc-fix-off-by-one-against-rsv_end
+++ a/fs/ext4/balloc.c
@@ -1165,7 +1165,7 @@ retry:
* check if the first free block is within the
* free space we just reserved
*/
- if (start_block >= my_rsv->rsv_start && start_block < my_rsv->rsv_end)
+ if (start_block >= my_rsv->rsv_start && start_block <= my_rsv->rsv_end)
return 0; /* success */
/*
* if the first free bit we found is out of the reservable space
_