[ Upstream commit ab2dd173330a3f07142e68cd65682205036cd00f ] The ptrace() test forgot to reap its child. Reap it. Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/e7700a503f30e79ab35a63103938a19893dbeff2.1598461151.git.luto@kernel.org Signed-off-by: Sasha Levin <sashal@kernel.org>