System reboot if using two lightgun

Description

I configured my RetroArch station with UDEV input driver so i can use two usb mice as lightgun. Everything works fine, I have two crosshairs working separate and i can play. The problem arises after a few minutes (1 or 2) during game; my Ubuntu 20.04 system reboots and no kernel crash dump is logged (I activated crashdump for this scope). The crash happens ONLY if i move both mice together...if i leave one mouse locked (no pointer events generated) the system seems to be stable and working.

hope it helps.

Expected behavior

Two mice working as lightgun

Actual behavior

My system crashes as an hardware reboot.

Steps to reproduce the bug

1. Open RetroArch
2. Load Flycast Core / Mame2003-Plus core (I tried these ones)
3. Load content (I used HOTD2/The maze of the king for Naomi and Area51 for Mame2003-Plus)
4. Start play
5. Enter quick menu
6. configure controller 1 mouse index as my first mouse
7. configure controller 2 mouse index as my second mouse
8. Back to game
9. Play; the crosshairs works indipendently one another for both core and i can play a little
10. the system crashes abruptly.

Bisect Results

I've updated on last RetroArch and Flycast/Mame2003-Plus revision 'cause i've seen there was a bug for lightgun indexing.

Version/Commit

• Retroarch 1.10.0 - e9e85f3
• GCC 9.4.0 64bit

Environment information

• OS: XUbuntu 20.04

Start by reproducing the reboot with the UDEV input driver, two USB mice, and the Flycast and Mame2003-Plus cores on Ubuntu 20.04. Use the quick menu's controller mouse-index configuration as the entry point; done means both independent crosshairs remain usable without an abrupt system reboot.