Before loading the zap shader we should ensure that the reserved memory
region is big enough to hold the loaded file.
Signed-off-by: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/adreno/adreno_gpu.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index 6f7f411..3db8e49 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -67,7 +67,6 @@ static int zap_shader_load_mdt(struct msm_gpu *gpu, const char *fwname,
return ret;
mem_phys = r.start;
- mem_size = resource_size(&r);
/* Request the MDT file for the firmware */
fw = adreno_request_fw(to_adreno_gpu(gpu), fwname);
@@ -83,6 +82,13 @@ static int zap_shader_load_mdt(struct msm_gpu *gpu, const char *fwname,
goto out;
}
+ if (mem_size > resource_size(&r)) {
+ DRM_DEV_ERROR(dev,
+ "memory region is too small to load the MDT\n");
+ ret = -E2BIG;
+ goto out;
+ }
+
/* Allocate memory for the firmware image */
mem_region = memremap(mem_phys, mem_size, MEMREMAP_WC);
if (!mem_region) {
--
2.7.4
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