diff options
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/sd.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 0252d3f6bed1..32ae4898cea7 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1974,9 +1974,19 @@ static int sd_pr_read_keys(struct block_device *bdev, struct pr_keys *keys_info) { int result, i, data_offset, num_copy_keys; u32 num_keys = keys_info->num_keys; - int data_len = num_keys * 8 + 8; + int data_len; u8 *data; + /* + * Each reservation key takes 8 bytes and there is an 8-byte header + * before the reservation key list. The total size must fit into the + * 16-bit ALLOCATION LENGTH field. + */ + if (check_mul_overflow(num_keys, 8, &data_len) || + check_add_overflow(data_len, 8, &data_len) || + data_len > USHRT_MAX) + return -EINVAL; + data = kzalloc(data_len, GFP_KERNEL); if (!data) return -ENOMEM; |