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surfaceflinger: Fix range check for getFormat 

Fix potential buffer overflow error in getFormat with indices
greater than MAX_HWC_DISPLAYS.

Change-Id: I5e5b69d8d043e900f5e33ca9a62e94ae5f857b68
This commit is contained in:
Ajay Dudani 2015-05-03 11:44:55 -07:00 committed by Patrick Tjin
parent cbe13ef59b
commit 4e3e30c2d5
1 changed files with 1 additions and 1 deletions
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2
services/surfaceflinger/DisplayHardware/HWComposer.cpp
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@ -461,7 +461,7 @@ sp<Fence> HWComposer::getDisplayFence(int disp) const {
}
uint32_t HWComposer::getFormat(int disp) const {
if (uint32_t(disp)>31 || !mAllocatedDisplayIDs.hasBit(disp)) {
if (static_cast<uint32_t>(disp) >= MAX_HWC_DISPLAYS || !mAllocatedDisplayIDs.hasBit(disp)) {
return HAL_PIXEL_FORMAT_RGBA_8888;
} else {
return mDisplayData[disp].format;