[Bug 215089] New: local struct uinput_event inconsistency with kernel y2038 safe struct input_event: AVRCP events vanish on 32-bit

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215089

            Bug ID: 215089
           Summary: local struct uinput_event inconsistency with kernel
                    y2038 safe struct input_event: AVRCP events vanish on
                    32-bit
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.10
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Bluetooth
          Assignee: linux-bluetooth@vger.kernel.org
          Reporter: spam@ipik.org
        Regression: No

Under bluez (up to 5.62) compiled with time64 support (like musl1.2 or possibly
newer glibc with __USE_TIME_BITS64) on 32-bit systems (x86 or armhf for
instance), AVRCP events just never show-up on input device.

Tools like evtest will not report any event upon bluetooth headset media button
keypress, whereas btmon sees them flowing through.

This bug does not hit x86-64 releases, only 32-bit are affected.

Issue has been discussed here [1], with a simple & replicable Alpinelinux 3.14
test case (based on musl 1.2).
Legacy local uinput_event struct might not play well with newer time64-aware
input_event kernel structure.



[1] https://github.com/bluez/bluez/issues/84#issuecomment-942155841

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