[Bug 46999] New: Controller with invalid HID range value causes division by zero error
wine-bugs at winehq.org
wine-bugs at winehq.org
Fri Apr 12 22:29:35 CDT 2019
https://bugs.winehq.org/show_bug.cgi?id=46999
Bug ID: 46999
Summary: Controller with invalid HID range value causes
division by zero error
Product: Wine
Version: 4.5
Hardware: x86
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: xinput
Assignee: wine-bugs at winehq.org
Reporter: gerbilsoft at gerbilsoft.com
Distribution: ---
I have an 8bitdo M30 controller, which is similar in design to a Sega Mega
Drive 6-button gamepad. Attempting to play the game Sonic 3 AIR with the
controller connected resulted in a division by zero error. I finally narrowed
it down to a crash in xinput1_3/hid.c, scale_short().
It seems that, since the controller doesn't have analog sticks, it reports a
range of 0. scale_short() doesn't expect this, so it ends up dividing by zero.
Workaround: If range is 0, return 0.
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