Please apply 4ea77014af0d620 ("kernel/signal.c: avoid undefined behaviour in kill_something_info") to v4.9.y and earlier

[Guenter Roeck <linux@xxxxxxxxxxxx>]

Hi Greg,

Please apply commit 4ea77014af0d620 ("kernel/signal.c: avoid undefined behaviour
in kill_something_info") to v4.9.y and earlier to fix CVE-2018-10124.

Thanks,
Guenter