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-rw-r--r--block/genhd.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 603db5d6f10c..626c8406f21a 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -431,6 +431,8 @@ int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
DISK_MAX_PARTS);
disk->minors = DISK_MAX_PARTS;
}
+ if (disk->first_minor + disk->minors > MINORMASK + 1)
+ return -EINVAL;
} else {
if (WARN_ON(disk->minors))
return -EINVAL;