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-rw-r--r--drivers/block/nbd.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 1df3bfe5225b..fdee7567fd15 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -757,6 +757,12 @@ static int __init nbd_init(void)
if (max_part > 0)
part_shift = fls(max_part);
+ if ((1UL << part_shift) > DISK_MAX_PARTS)
+ return -EINVAL;
+
+ if (nbds_max > 1UL << (MINORBITS - part_shift))
+ return -EINVAL;
+
for (i = 0; i < nbds_max; i++) {
struct gendisk *disk = alloc_disk(1 << part_shift);
if (!disk)