tree 3e8d42bb78fb4849c495567b04c70516a6cb8b7f
parent c576e0fcd6188d0edb50b0fb83f853433ef4819b
author Matthew Bobrowski <repnop@google.com> 1628400305 +1000
committer Jan Kara <jack@suse.cz> 1628592787 +0200

kernel/pid.c: implement additional checks upon pidfd_create() parameters

By adding the pidfd_create() declaration to linux/pid.h, we
effectively expose this function to the rest of the kernel. In order
to avoid any unintended behavior, or set false expectations upon this
function, ensure that constraints are forced upon each of the passed
parameters. This includes the checking of whether the passed struct
pid is a thread-group leader as pidfd creation is currently limited to
such pid types.

Link: https://lore.kernel.org/r/2e9b91c2d529d52a003b8b86c45f866153be9eb5.1628398044.git.repnop@google.com
Signed-off-by: Matthew Bobrowski <repnop@google.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Jan Kara <jack@suse.cz>