Plugging devices that declare more LEDs than it is known to to input-leds causes kernel warnings and soft lockups
Issue
After plugging the device that declares more LEDs than it is known to the input-leds driver, the following warning may appear:
kernel: WARNING: CPU: 2 PID: 32742 at drivers/input/input-leds.c:115 input_leds_connect+0x276/0x280
After unplugging or unbinding (through the sysfs interface) such a device, a soft lockup may occur:
kernel: NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [command:1234]
…
kernel: RIP: 0010:[<ffffffffaaaa32dd>] [<ffffffffaaaa32dd>] lock_timer_base.isra.34+0x4d/0x50
Environment
- Red Hat Enterprise Linux 7.5
- seen with the following USB devices:
- Ultimarc IPAC
- External HDD Western Digital
- Imation-IronKey
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