diff options
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/genwqe/card_dev.c | 2 | ||||
| -rw-r--r-- | drivers/misc/genwqe/card_utils.c | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/misc/genwqe/card_dev.c b/drivers/misc/genwqe/card_dev.c index 8c1b63a4337b..d2098b4d2945 100644 --- a/drivers/misc/genwqe/card_dev.c +++ b/drivers/misc/genwqe/card_dev.c @@ -780,6 +780,8 @@ 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); diff --git a/drivers/misc/genwqe/card_utils.c b/drivers/misc/genwqe/card_utils.c index 89cff9d1012b..7571700abc6e 100644 --- a/drivers/misc/genwqe/card_utils.c +++ b/drivers/misc/genwqe/card_utils.c @@ -586,6 +586,10 @@ int genwqe_user_vmap(struct genwqe_dev *cd, struct dma_mapping *m, void *uaddr, /* determine space needed for page_list. */ data = (unsigned long)uaddr; offs = offset_in_page(data); + if (size > ULONG_MAX - PAGE_SIZE - offs) { + m->size = 0; /* mark unused and not added */ + return -EINVAL; + } m->nr_pages = DIV_ROUND_UP(offs + size, PAGE_SIZE); m->page_list = kcalloc(m->nr_pages, |