From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: Eugene Syromiatnikov <esyr@redhat.com>

Date: Thu, 14 Jun 2018 16:36:08 -0400

Subject: [PATCH] bpf: Add tech preview taint for syscall

Message-id: <394af3a9985d1ad9ea6741cb95ff145312d106b9.1528991396.git.esyr@redhat.com>

Patchwork-id: 8251

O-Subject: [kernel team] [RHEL8 PATCH v4 3/5] [bpf] bpf: Add tech preview taint for syscall

Bugzilla: 1559877

RH-Acked-by: Jiri Benc <jbenc@redhat.com>

RH-Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>

Adding tech preview taint for using the eBPF syscall.

Based on a RHEL 7 commit "bpf: Add tech preview taint for syscall" by

Jiri Olsa.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1559877

Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=16716594

Upstream Status: RHEL only

Signed-off-by: Jiri Olsa <jolsa@redhat.com>

Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>

Signed-off-by: Herton R. Krzesinski <herton@redhat.com>

---

 kernel/bpf/syscall.c | 6 ++++++

 1 file changed, 6 insertions(+)

diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c

index 8f5546ec2d1f..772054412fab 100644

--- a/kernel/bpf/syscall.c

+++ b/kernel/bpf/syscall.c

@@ -4091,11 +4091,17 @@ static int bpf_iter_create(union bpf_attr *attr)

 SYSCALL_DEFINE3(bpf, int, cmd, union bpf_attr __user *, uattr, unsigned int, size)

 {

 	union bpf_attr attr;

+	static int marked;

 	int err;

 	if (sysctl_unprivileged_bpf_disabled && !bpf_capable())

 		return -EPERM;

+	if (!marked) {

+		mark_tech_preview("eBPF syscall", NULL);

+		marked = true;

+	}

+

 	err = bpf_check_uarg_tail_zero(uattr, sizeof(attr), size);

 	if (err)

 		return err;

-- 

2.26.2