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Bypass surface flinger permission check for calls from system. 

Early during the boot, before activity manager is ready to handle
permission checks, the system needs to be able to change the display
state.  Added a hardcoded exemption for AID_SYSTEM (which already
has permission to talk to surface flinger anyhow).

Bug: 19029490
Change-Id: I6222edcab8e394e5fb6adf7a982be446e4505a1e
This commit is contained in:
Jeff Brown 2015-04-10 20:20:13 -07:00
parent 1044367a73
commit 3bfe51d790
2 changed files with 2 additions and 2 deletions
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2
services/surfaceflinger/Client.cpp
View File

@ -93,7 +93,7 @@ status_t Client::onTransact(
const int pid = ipc->getCallingPid();
const int uid = ipc->getCallingUid();
const int self_pid = getpid();
if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != 0)) {
if (CC_UNLIKELY(pid != self_pid && uid != AID_GRAPHICS && uid != AID_SYSTEM && uid != 0)) {
// we're called from a different process, do the real check
if (!PermissionCache::checkCallingPermission(sAccessSurfaceFlinger))
{

2
services/surfaceflinger/SurfaceFlinger.cpp
View File

@ -2799,7 +2799,7 @@ status_t SurfaceFlinger::onTransact(
IPCThreadState* ipc = IPCThreadState::self();
const int pid = ipc->getCallingPid();
const int uid = ipc->getCallingUid();
if ((uid != AID_GRAPHICS) &&
if ((uid != AID_GRAPHICS && uid != AID_SYSTEM) &&
!PermissionCache::checkPermission(sAccessSurfaceFlinger, pid, uid)) {
ALOGE("Permission Denial: "
"can't access SurfaceFlinger pid=%d, uid=%d", pid, uid);