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sm8450-common: udfps: Don't try to read with a negative length

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Change-Id: If404b671eff00ac8281af2038a113519cd10cc9d
This commit is contained in:
Arian 2024-03-18 09:43:51 +01:00
parent 705b60c599
commit 573195b6d2
1 changed files with 6 additions and 0 deletions
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6
udfps/UdfpsHandler.cpp
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@ -77,7 +77,13 @@ static disp_event_resp* parseDispEvent(int fd) {
struct disp_event_resp* response =
reinterpret_cast<struct disp_event_resp*>(malloc(header.length));
response->base = header;
int dataLength = response->base.length - sizeof(response->base);
if (dataLength < 0) {
LOG(ERROR) << "invalid data length: " << response->base.length;
return nullptr;
}
ssize_t dataSize = read(fd, &response->data, dataLength);
if (dataSize < dataLength) {
LOG(ERROR) << "unexpected display event data size: " << dataSize;