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, 61 insertions, 0 deletions

diff --git a/drivers/clk/renesas/Makefile b/drivers/clk/renesas/Makefile
new file mode 100644
index 000000000..bd2bed91a
--- /dev/null
+++ b/drivers/clk/renesas/Makefile
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: GPL-2.0
+# SoC
+obj-$(CONFIG_CLK_EMEV2)			+= clk-emev2.o
+obj-$(CONFIG_CLK_RZA1)			+= clk-rz.o
+obj-$(CONFIG_CLK_R7S9210)		+= r7s9210-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A73A4)		+= clk-r8a73a4.o
+obj-$(CONFIG_CLK_R8A7740)		+= clk-r8a7740.o
+obj-$(CONFIG_CLK_R8A7742)		+= r8a7742-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A7743)		+= r8a7743-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A7745)		+= r8a7745-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A77470)		+= r8a77470-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A774A1)		+= r8a774a1-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A774B1)		+= r8a774b1-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A774C0)		+= r8a774c0-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A774E1)		+= r8a774e1-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A7778)		+= clk-r8a7778.o
+obj-$(CONFIG_CLK_R8A7779)		+= clk-r8a7779.o
+obj-$(CONFIG_CLK_R8A7790)		+= r8a7790-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A7791)		+= r8a7791-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A7792)		+= r8a7792-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A7794)		+= r8a7794-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A7795)		+= r8a7795-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A77960)		+= r8a7796-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A77961)		+= r8a7796-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A77965)		+= r8a77965-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A77970)		+= r8a77970-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A77980)		+= r8a77980-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A77990)		+= r8a77990-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A77995)		+= r8a77995-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A779A0)		+= r8a779a0-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A779F0)		+= r8a779f0-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A779G0)		+= r8a779g0-cpg-mssr.o
+obj-$(CONFIG_CLK_R8A779H0)		+= r8a779h0-cpg-mssr.o
+obj-$(CONFIG_CLK_R9A06G032)		+= r9a06g032-clocks.o
+obj-$(CONFIG_CLK_R9A07G043)		+= r9a07g043-cpg.o
+obj-$(CONFIG_CLK_R9A07G044)		+= r9a07g044-cpg.o
+obj-$(CONFIG_CLK_R9A07G054)		+= r9a07g044-cpg.o
+obj-$(CONFIG_CLK_R9A08G045)		+= r9a08g045-cpg.o
+obj-$(CONFIG_CLK_R9A08G046)		+= r9a08g046-cpg.o
+obj-$(CONFIG_CLK_R9A09G011)		+= r9a09g011-cpg.o
+obj-$(CONFIG_CLK_R9A09G047)		+= r9a09g047-cpg.o
+obj-$(CONFIG_CLK_R9A09G056)		+= r9a09g056-cpg.o
+obj-$(CONFIG_CLK_R9A09G057)		+= r9a09g057-cpg.o
+obj-$(CONFIG_CLK_R9A09G077)		+= r9a09g077-cpg.o
+obj-$(CONFIG_CLK_R9A09G087)		+= r9a09g077-cpg.o
+obj-$(CONFIG_CLK_SH73A0)		+= clk-sh73a0.o
+
+# Family
+obj-$(CONFIG_CLK_RCAR_CPG_LIB)		+= rcar-cpg-lib.o
+obj-$(CONFIG_CLK_RCAR_GEN2_CPG)		+= rcar-gen2-cpg.o
+obj-$(CONFIG_CLK_RCAR_GEN3_CPG)		+= rcar-gen3-cpg.o
+obj-$(CONFIG_CLK_RCAR_GEN4_CPG)		+= rcar-gen4-cpg.o
+obj-$(CONFIG_CLK_RCAR_USB2_CLOCK_SEL)	+= rcar-usb2-clock-sel.o
+obj-$(CONFIG_CLK_RZG2L)			+= rzg2l-cpg.o
+obj-$(CONFIG_CLK_RZV2H)			+= rzv2h-cpg.o
+
+# Generic
+obj-$(CONFIG_CLK_RENESAS_CPG_MSSR)	+= renesas-cpg-mssr.o
+obj-$(CONFIG_CLK_RENESAS_CPG_MSTP)	+= clk-mstp.o
+obj-$(CONFIG_CLK_RENESAS_DIV6)		+= clk-div6.o
+obj-$(CONFIG_CLK_RENESAS_VBATTB)	+= clk-vbattb.o