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-rw-r--r--block/scsi_ioctl.c15
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
85static 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
85static int sg_get_reserved_size(struct request_queue *q, int __user *p) 94static 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