diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/scsi_ioctl.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index 14695c6221c8..bda1497add4c 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c | |||
| @@ -82,9 +82,18 @@ static int sg_set_timeout(struct request_queue *q, int __user *p) | |||
| 82 | return err; | 82 | return err; |
| 83 | } | 83 | } |
| 84 | 84 | ||
| 85 | static int max_sectors_bytes(struct request_queue *q) | ||
| 86 | { | ||
| 87 | unsigned int max_sectors = queue_max_sectors(q); | ||
| 88 | |||
| 89 | max_sectors = min_t(unsigned int, max_sectors, INT_MAX >> 9); | ||
| 90 | |||
| 91 | return max_sectors << 9; | ||
| 92 | } | ||
| 93 | |||
| 85 | static int sg_get_reserved_size(struct request_queue *q, int __user *p) | 94 | static int sg_get_reserved_size(struct request_queue *q, int __user *p) |
| 86 | { | 95 | { |
| 87 | unsigned val = min(q->sg_reserved_size, queue_max_sectors(q) << 9); | 96 | int val = min_t(int, q->sg_reserved_size, max_sectors_bytes(q)); |
| 88 | 97 | ||
| 89 | return put_user(val, p); | 98 | return put_user(val, p); |
| 90 | } | 99 | } |
| @@ -98,10 +107,8 @@ static int sg_set_reserved_size(struct request_queue *q, int __user *p) | |||
| 98 | 107 | ||
| 99 | if (size < 0) | 108 | if (size < 0) |
| 100 | return -EINVAL; | 109 | return -EINVAL; |
| 101 | if (size > (queue_max_sectors(q) << 9)) | ||
| 102 | size = queue_max_sectors(q) << 9; | ||
| 103 | 110 | ||
| 104 | q->sg_reserved_size = size; | 111 | q->sg_reserved_size = min(size, max_sectors_bytes(q)); |
| 105 | return 0; | 112 | return 0; |
| 106 | } | 113 | } |
| 107 | 114 | ||
