hal: Usb: Handle failure cases for readFile during autosuspend check
In the event readFile fails to open file for checking interface class,
the return value is not checked. Instead only data length is checked.
Invoking stoi on this wrong string saw a SIGABRT crash. Initialize
the string to be read to be an empty string so that if fopen fails
the length check ensures we don't access any invalid or corrupt data.
Change-Id: If2c3b081e9de5c4c801d98fe631c1ac997a2d9ba
diff --git a/hal/Usb.cpp b/hal/Usb.cpp
index 418f43c..ea45862 100644
--- a/hal/Usb.cpp
+++ b/hal/Usb.cpp
@@ -1099,7 +1099,7 @@
static bool checkUsbInterfaceAutoSuspend(const std::string& devicePath,
const std::string &intf) {
- std::string bInterfaceClass;
+ std::string bInterfaceClass = "";
int interfaceClass, ret = -1, retry = 3;
do {