Merge "ion: msm: Restrict VMID_CP_CAMERA_ENCODE to read only" (7c4c4844) · Commits · e / devices / android_kernel_xiaomi_sm6125

drivers/staging/android/ion/ion_secure_util.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -155,6 +155,8 @@ int ion_hyp_assign_sg(struct sg_table sgt, int dest_vm_list,
		int *dest_perms;
		int i;
		int ret = 0;
		int j = -1;
		int k = -1;

		if (dest_nelems <= 0) {
		pr_err("%s: dest_nelems invalid\n",
		@@ -173,10 +175,20 @@ int ion_hyp_assign_sg(struct sg_table sgt, int dest_vm_list,
		if (dest_vm_list[i] == VMID_CP_SEC_DISPLAY \|\|
		dest_vm_list[i] == VMID_CP_DSP_EXT)
		dest_perms[i] = PERM_READ;
		else if (dest_vm_list[i] == VMID_CP_CAMERA_ENCODE) {
		j = i;
		dest_perms[i] = PERM_READ \| PERM_WRITE;
		} else if (dest_vm_list[i] == VMID_CP_CAMERA) {
		k = i;
		dest_perms[i] = PERM_READ \| PERM_WRITE;
		}
		else
		dest_perms[i] = PERM_READ \| PERM_WRITE;
		}

		if ((j != -1) && (k != -1))
		dest_perms[j] = PERM_READ;

		ret = hyp_assign_table(sgt, &source_vmid, 1,
		dest_vm_list, dest_perms, dest_nelems);