selftests/bpf: Reject graph kptr use after RCU unlockgrafted

Add a sleepable verifier test that loads a graph-node local kptr in an
explicit RCU read-side critical section, then passes its node to
bpf_rbtree_remove() after the section ends.

Before the verifier fix, the stale NON_OWN_REF flag makes the node look like
a live borrowed reference and the program is accepted. After the fix, the
pointer is demoted without NON_OWN_REF and the graph kfunc argument is
rejected.

Also exercise a graph kptr loaded while a spin lock provides implicit RCU
protection. The pointer must be invalidated when the lock is released, which
guards the required ordering between non-owning-reference invalidation and
RCU demotion.

Update the existing fault-protected load test state description. The
post-unlock pointer no longer carries NON_OWN_REF, but remains readable
because the load is rewritten to use BPF_PROBE_MEM.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/clk/actions/Makefile b/drivers/clk/actions/Makefile
new file mode 100644
index 000000000..db1c4584d
--- /dev/null
+++ b/drivers/clk/actions/Makefile
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_CLK_ACTIONS)	+= clk-owl.o
+
+clk-owl-y			+= owl-common.o
+clk-owl-y			+= owl-gate.o
+clk-owl-y			+= owl-mux.o
+clk-owl-y			+= owl-divider.o
+clk-owl-y			+= owl-factor.o
+clk-owl-y			+= owl-composite.o
+clk-owl-y			+= owl-pll.o
+clk-owl-y			+= owl-reset.o
+
+# SoC support
+obj-$(CONFIG_CLK_OWL_S500)	+= owl-s500.o
+obj-$(CONFIG_CLK_OWL_S700)	+= owl-s700.o
+obj-$(CONFIG_CLK_OWL_S900)	+= owl-s900.o