| Message ID | 20230419085747.4720-1-hackyzh002@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2,1/2] drm/radeon: Fix integer overflow in radeon_cs_parser_init | expand |
Am 19.04.23 um 10:57 schrieb hackyzh002: > The type of size is unsigned, if size is 0x40000000, there will be an > integer overflow, size will be zero after size *= sizeof(uint32_t), > will cause uninitialized memory to be referenced later > > Signed-off-by: hackyzh002 <hackyzh002@gmail.com> > --- > drivers/gpu/drm/radeon/radeon_cs.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c > index 46a27ebf4..8e12b406e 100644 > --- a/drivers/gpu/drm/radeon/radeon_cs.c > +++ b/drivers/gpu/drm/radeon/radeon_cs.c > @@ -270,7 +270,7 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data) > { > struct drm_radeon_cs *cs = data; > uint64_t *chunk_array_ptr; > - unsigned size, i; > + u64 size, i; Ok, once more: Please only change the type of the "size" variable" and not the type of "i". Otherwise the patch looks good to me, Christian. > u32 ring = RADEON_CS_RING_GFX; > s32 priority = 0; >
diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c index 46a27ebf4..8e12b406e 100644 --- a/drivers/gpu/drm/radeon/radeon_cs.c +++ b/drivers/gpu/drm/radeon/radeon_cs.c @@ -270,7 +270,7 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data) { struct drm_radeon_cs *cs = data; uint64_t *chunk_array_ptr; - unsigned size, i; + u64 size, i; u32 ring = RADEON_CS_RING_GFX; s32 priority = 0;
The type of size is unsigned, if size is 0x40000000, there will be an integer overflow, size will be zero after size *= sizeof(uint32_t), will cause uninitialized memory to be referenced later Signed-off-by: hackyzh002 <hackyzh002@gmail.com> --- drivers/gpu/drm/radeon/radeon_cs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)