diff options
| -rw-r--r-- | drivers/block/rbd.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 4ed074138f8d..58d01e3a0fce 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -820,6 +820,7 @@ static int rbd_get_num_segments(struct rbd_image_header *header, { u64 start_seg; u64 end_seg; + u64 result; if (!len) return 0; @@ -829,7 +830,11 @@ static int rbd_get_num_segments(struct rbd_image_header *header, start_seg = ofs >> header->obj_order; end_seg = (ofs + len - 1) >> header->obj_order; - return end_seg - start_seg + 1; + result = end_seg - start_seg + 1; + if (result > (u64) INT_MAX) + return -ERANGE; + + return (int) result; } /* |