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Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  agp: fix arbitrary kernel memory writes
  agp: fix OOM and buffer overflow
  drm/radeon/kms: fix IH writeback on r6xx+ on big endian machines
This commit is contained in:
Linus Torvalds 2011-04-21 09:57:56 -07:00
parent 25b210371f 194b3da873
commit 8ed54bd565
3 changed files with 17 additions and 6 deletions
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19
drivers/char/agp/generic.c
View File

@ -115,6 +115,9 @@ static struct agp_memory *agp_create_user_memory(unsigned long num_agp_pages)
struct agp_memory *new;
unsigned long alloc_size = num_agp_pages*sizeof(struct page *);
if (INT_MAX/sizeof(struct page *) < num_agp_pages)
return NULL;
new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL);
if (new == NULL)
return NULL;
@ -234,11 +237,14 @@ struct agp_memory *agp_allocate_memory(struct agp_bridge_data *bridge,
int scratch_pages;
struct agp_memory *new;
size_t i;
int cur_memory;
if (!bridge)
return NULL;
if ((atomic_read(&bridge->current_memory_agp) + page_count) > bridge->max_memory_agp)
cur_memory = atomic_read(&bridge->current_memory_agp);
if ((cur_memory + page_count > bridge->max_memory_agp) ||
(cur_memory + page_count < page_count))
return NULL;
if (type >= AGP_USER_TYPES) {
@ -1089,8 +1095,8 @@ int agp_generic_insert_memory(struct agp_memory * mem, off_t pg_start, int type)
return -EINVAL;
}
/* AK: could wrap */
if ((pg_start + mem->page_count) > num_entries)
if (((pg_start + mem->page_count) > num_entries) ||
((pg_start + mem->page_count) < pg_start))
return -EINVAL;
j = pg_start;
@ -1124,7 +1130,7 @@ int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type)
{
size_t i;
struct agp_bridge_data *bridge;
int mask_type;
int mask_type, num_entries;
bridge = mem->bridge;
if (!bridge)
@ -1136,6 +1142,11 @@ int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type)
if (type != mem->type)
return -EINVAL;
num_entries = agp_num_entries();
if (((pg_start + mem->page_count) > num_entries) ||
((pg_start + mem->page_count) < pg_start))
return -EINVAL;
mask_type = bridge->driver->agp_type_to_mask_type(bridge, type);
if (mask_type != 0) {
/* The generic routines know nothing of memory types */

2
drivers/gpu/drm/radeon/evergreen.c
View File

@ -2580,7 +2580,7 @@ static inline u32 evergreen_get_ih_wptr(struct radeon_device *rdev)
u32 wptr, tmp;
if (rdev->wb.enabled)
wptr = rdev->wb.wb[R600_WB_IH_WPTR_OFFSET/4];
wptr = le32_to_cpu(rdev->wb.wb[R600_WB_IH_WPTR_OFFSET/4]);
else
wptr = RREG32(IH_RB_WPTR);

2
drivers/gpu/drm/radeon/r600.c
View File

@ -3231,7 +3231,7 @@ static inline u32 r600_get_ih_wptr(struct radeon_device *rdev)
u32 wptr, tmp;
if (rdev->wb.enabled)
wptr = rdev->wb.wb[R600_WB_IH_WPTR_OFFSET/4];
wptr = le32_to_cpu(rdev->wb.wb[R600_WB_IH_WPTR_OFFSET/4]);
else
wptr = RREG32(IH_RB_WPTR);