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Fix crash in HIDListenerIOKit when wLenDone == 0

This commit is contained in:
Phillip Stephens 2016-07-09 14:54:08 -07:00
parent 44e8317d49
commit 1d02741879
1 changed files with 3 additions and 0 deletions
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3
lib/inputdev/HIDListenerIOKit.cpp
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@ -43,6 +43,9 @@ static bool getUSBStringDescriptor(IOUSBDeviceInterface182** usbDevice, UInt8 id
// we're mallocing this string just as an example. But you probably will want // we're mallocing this string just as an example. But you probably will want
// to do something smarter, like pre-allocated buffers in the info class, or // to do something smarter, like pre-allocated buffers in the info class, or
// use a string class. // use a string class.
if (request.wLenDone == 0)
return false;
unsigned count = (request.wLenDone - 1) / 2; unsigned count = (request.wLenDone - 1) / 2;
unsigned i; unsigned i;
for (i=0 ; i<count ; ++i) for (i=0 ; i<count ; ++i)