kernel/signal.c: protect the SIGNAL_UNKILLABLE tasks from !sig_kernel_only() signals
authorOleg Nesterov <oleg@redhat.com>
Fri, 17 Nov 2017 23:30:04 +0000 (15:30 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 10 Jan 2018 08:31:20 +0000 (09:31 +0100)
commit94429f353675f4e3e5fefdaf3e01a18d44074f87
tree211d1d5967afd30229866f015df981ff85ba7ee4
parent2ebd69e8c251597f51768dce320cc10f9b4c8894
kernel/signal.c: protect the SIGNAL_UNKILLABLE tasks from !sig_kernel_only() signals

commit ac25385089f673560867eb5179228a44ade0cfc1 upstream.

Change sig_task_ignored() to drop the SIG_DFL && !sig_kernel_only()
signals even if force == T.  This simplifies the next change and this
matches the same check in get_signal() which will drop these signals
anyway.

Link: http://lkml.kernel.org/r/20171103184227.GC21036@redhat.com
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Tested-by: Kyle Huey <me@kylehuey.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kernel/signal.c