summaryrefslogtreecommitdiff
path: root/drivers/misc/genwqe/card_dev.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/misc/genwqe/card_dev.c')
-rw-r--r--drivers/misc/genwqe/card_dev.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/misc/genwqe/card_dev.c b/drivers/misc/genwqe/card_dev.c
index c0012ca4229e..74923ffb0df1 100644
--- a/drivers/misc/genwqe/card_dev.c
+++ b/drivers/misc/genwqe/card_dev.c
@@ -782,6 +782,8 @@ static int genwqe_pin_mem(struct genwqe_file *cfile, struct genwqe_mem *m)
if ((m->addr == 0x0) || (m->size == 0))
return -EINVAL;
+ if (m->size > ULONG_MAX - PAGE_SIZE - (m->addr & ~PAGE_MASK))
+ return -EINVAL;
map_addr = (m->addr & PAGE_MASK);
map_size = round_up(m->size + (m->addr & ~PAGE_MASK), PAGE_SIZE);