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

bugzilla-daemon
2021-11-21T15:55:07Z

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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