diff options
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c index f72eebc71dd8..94590ac5b3cf 100644 --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c @@ -381,9 +381,18 @@ create_pagelist(char __user *buf, size_t count, unsigned short type, int run, addridx, actual_pages; unsigned long *need_release; + if (count >= INT_MAX - PAGE_SIZE) + return NULL; + offset = (unsigned int)buf & (PAGE_SIZE - 1); num_pages = (count + offset + PAGE_SIZE - 1) / PAGE_SIZE; + if (num_pages > (SIZE_MAX - sizeof(PAGELIST_T) - + sizeof(struct vchiq_pagelist_info)) / + (sizeof(u32) + sizeof(pages[0]) + + sizeof(struct scatterlist))) + return NULL; + *ppagelist = NULL; /* Allocate enough storage to hold the page pointers and the page |