signal: Always deliver the kernel's SIGKILL and SIGSTOP to a pid namespace init

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commit 3597dfe01d upstream.

Instead of playing whack-a-mole and changing SEND_SIG_PRIV to
SEND_SIG_FORCED throughout the kernel to ensure a pid namespace init
gets signals sent by the kernel, stop allowing a pid namespace init to
ignore SIGKILL or SIGSTOP sent by the kernel.  A pid namespace init is
only supposed to be able to ignore signals sent from itself and
children with SIG_DFL.

Fixes: 921cf9f630 ("signals: protect cinit from unblocked SIG_DFL signals")
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

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Eric W. Biederman 2018-09-03 20:02:46 +02:00 • committed by Ben Hutchings

parent e965c532ed

commit f71b695346

1 changed files with 1 additions and 1 deletions

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kernel/signal.c

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