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, 39 insertions, 0 deletions

diff --git a/drivers/clk/rockchip/Makefile b/drivers/clk/rockchip/Makefile
new file mode 100644
index 000000000..7c984ee00
--- /dev/null
+++ b/drivers/clk/rockchip/Makefile
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Rockchip Clock specific Makefile
+#
+
+obj-$(CONFIG_COMMON_CLK_ROCKCHIP) += clk-rockchip.o
+
+clk-rockchip-y += clk.o
+clk-rockchip-y += clk-pll.o
+clk-rockchip-y += clk-cpu.o
+clk-rockchip-y += clk-gate-grf.o
+clk-rockchip-y += clk-half-divider.o
+clk-rockchip-y += clk-inverter.o
+clk-rockchip-y += clk-mmc-phase.o
+clk-rockchip-y += clk-muxgrf.o
+clk-rockchip-y += clk-ddr.o
+clk-rockchip-y += gate-link.o
+clk-rockchip-$(CONFIG_RESET_CONTROLLER) += softrst.o
+
+obj-$(CONFIG_CLK_PX30)          += clk-px30.o
+obj-$(CONFIG_CLK_RV1103B)	+= clk-rv1103b.o
+obj-$(CONFIG_CLK_RV110X)        += clk-rv1108.o
+obj-$(CONFIG_CLK_RV1126)        += clk-rv1126.o
+obj-$(CONFIG_CLK_RV1126B)	+= clk-rv1126b.o rst-rv1126b.o
+obj-$(CONFIG_CLK_RK3036)        += clk-rk3036.o
+obj-$(CONFIG_CLK_RK312X)        += clk-rk3128.o
+obj-$(CONFIG_CLK_RK3188)        += clk-rk3188.o
+obj-$(CONFIG_CLK_RK322X)        += clk-rk3228.o
+obj-$(CONFIG_CLK_RK3288)        += clk-rk3288.o
+obj-$(CONFIG_CLK_RK3308)        += clk-rk3308.o
+obj-$(CONFIG_CLK_RK3328)        += clk-rk3328.o
+obj-$(CONFIG_CLK_RK3368)        += clk-rk3368.o
+obj-$(CONFIG_CLK_RK3399)        += clk-rk3399.o
+obj-$(CONFIG_CLK_RK3506)	+= clk-rk3506.o rst-rk3506.o
+obj-$(CONFIG_CLK_RK3528)	+= clk-rk3528.o rst-rk3528.o
+obj-$(CONFIG_CLK_RK3562)	+= clk-rk3562.o rst-rk3562.o
+obj-$(CONFIG_CLK_RK3568)	+= clk-rk3568.o
+obj-$(CONFIG_CLK_RK3576)	+= clk-rk3576.o rst-rk3576.o
+obj-$(CONFIG_CLK_RK3588)	+= clk-rk3588.o rst-rk3588.o