redonkable/alistair23-linux
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drm/msm: fix cmdstream size check

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Need to check size+offset against bo size (duh!).. now we have a test
case to make sure I've done it right:

https://github.com/freedreno/msmtest/blob/master/submittest.c

Also, use DRM_ERROR() for error case traces, which makes debugging
userspace easier when enabling debug traces is too much.

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark 2013-09-06 15:36:40 -04:00
parent 26791c48e1
commit 198725337e
1 changed files with 13 additions and 11 deletions
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24
drivers/gpu/drm/msm/msm_gem_submit.c
View file

@ -78,7 +78,7 @@ static int submit_lookup_objects(struct msm_gem_submit *submit,
}
if (submit_bo.flags & BO_INVALID_FLAGS) {
DBG("invalid flags: %x", submit_bo.flags);
DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
ret = -EINVAL;
goto out_unlock;
}
@ -92,7 +92,7 @@ static int submit_lookup_objects(struct msm_gem_submit *submit,
*/
obj = idr_find(&file->object_idr, submit_bo.handle);
if (!obj) {
DBG("invalid handle %u at index %u", submit_bo.handle, i);
DRM_ERROR("invalid handle %u at index %u\n", submit_bo.handle, i);
ret = -EINVAL;
goto out_unlock;
}
@ -100,7 +100,7 @@ static int submit_lookup_objects(struct msm_gem_submit *submit,
msm_obj = to_msm_bo(obj);
if (!list_empty(&msm_obj->submit_entry)) {
DBG("handle %u at index %u already on submit list",
DRM_ERROR("handle %u at index %u already on submit list\n",
submit_bo.handle, i);
ret = -EINVAL;
goto out_unlock;
@ -216,8 +216,9 @@ static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
struct msm_gem_object **obj, uint32_t *iova, bool *valid)
{
if (idx >= submit->nr_bos) {
DBG("invalid buffer index: %u (out of %u)", idx, submit->nr_bos);
return EINVAL;
DRM_ERROR("invalid buffer index: %u (out of %u)\n",
idx, submit->nr_bos);
return -EINVAL;
}
if (obj)
@ -239,7 +240,7 @@ static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *ob
int ret;
if (offset % 4) {
DBG("non-aligned cmdstream buffer: %u", offset);
DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
return -EINVAL;
}
@ -266,7 +267,7 @@ static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *ob
return -EFAULT;
if (submit_reloc.submit_offset % 4) {
DBG("non-aligned reloc offset: %u",
DRM_ERROR("non-aligned reloc offset: %u\n",
submit_reloc.submit_offset);
return -EINVAL;
}
@ -276,7 +277,7 @@ static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *ob
if ((off >= (obj->base.size / 4)) ||
(off < last_offset)) {
DBG("invalid offset %u at reloc %u", off, i);
DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
return -EINVAL;
}
@ -374,14 +375,15 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
goto out;
if (submit_cmd.size % 4) {
DBG("non-aligned cmdstream buffer size: %u",
DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
submit_cmd.size);
ret = -EINVAL;
goto out;
}
if (submit_cmd.size >= msm_obj->base.size) {
DBG("invalid cmdstream size: %u", submit_cmd.size);
if ((submit_cmd.size + submit_cmd.submit_offset) >=
msm_obj->base.size) {
DRM_ERROR("invalid cmdstream size: %u\n", submit_cmd.size);
ret = -EINVAL;
goto out;
}