linux-kernel - Re: [PATCH v2 3/3] selftests/seccomp: Test SECCOMP_IOCTL_NOTIF

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Date:   Fri, 29 May 2020 00:41:51 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Sargun Dhillon <sargun@...gun.me>
Cc:     christian.brauner@...ntu.com,
        containers@...ts.linux-foundation.org, cyphar@...har.com,
        jannh@...gle.com, jeffv@...gle.com, linux-api@...r.kernel.org,
        linux-kernel@...r.kernel.org, palmer@...gle.com, rsesek@...gle.com,
        tycho@...ho.ws, Matt Denton <mpdenton@...gle.com>
Subject: Re: [PATCH v2 3/3] selftests/seccomp: Test SECCOMP_IOCTL_NOTIF_ADDFD

On Thu, May 28, 2020 at 04:08:58AM -0700, Sargun Dhillon wrote:
> +	EXPECT_EQ(ioctl(listener, SECCOMP_IOCTL_NOTIF_SEND, &resp), 0);
> +
> +	nextid = req.id + 1;
> +
> +	/* Wait for getppid to be called for the second time */
> +	sleep(1);

I always rebel at finding "sleep" in tests. ;) Is this needed? IIUC,
userspace will immediately see EINPROGRESS after the NOTIF_SEND
finishes, yes?

Otherwise, yes, this looks good.

-- 
Kees Cook