From 6668ed271eaefaa63e686bdfbedaeb7b8e492722 Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi Date: Fri, 4 Sep 2026 10:43:19 +0200 Subject: selftests/bpf: Reject graph kptr use after RCU unlock 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 Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/clk/at91/Makefile | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 drivers/clk/at91/Makefile (limited to 'drivers/clk/at91/Makefile') diff --git a/drivers/clk/at91/Makefile b/drivers/clk/at91/Makefile new file mode 100644 index 000000000..9128a06b8 --- /dev/null +++ b/drivers/clk/at91/Makefile @@ -0,0 +1,28 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for at91 specific clk +# + +obj-y += pmc.o sckc.o +obj-y += clk-slow.o clk-main.o clk-pll.o clk-plldiv.o clk-master.o +obj-y += clk-system.o clk-peripheral.o clk-programmable.o + +obj-$(CONFIG_HAVE_AT91_AUDIO_PLL) += clk-audio-pll.o +obj-$(CONFIG_HAVE_AT91_UTMI) += clk-utmi.o +obj-$(CONFIG_HAVE_AT91_USB_CLK) += clk-usb.o +obj-$(CONFIG_HAVE_AT91_SMD) += clk-smd.o +obj-$(CONFIG_HAVE_AT91_H32MX) += clk-h32mx.o +obj-$(CONFIG_HAVE_AT91_GENERATED_CLK) += clk-generated.o +obj-$(CONFIG_HAVE_AT91_I2S_MUX_CLK) += clk-i2s-mux.o +obj-$(CONFIG_HAVE_AT91_SAM9X60_PLL) += clk-sam9x60-pll.o +obj-$(CONFIG_SOC_AT91RM9200) += at91rm9200.o dt-compat.o +obj-$(CONFIG_SOC_AT91SAM9) += at91sam9260.o at91sam9rl.o at91sam9x5.o dt-compat.o +obj-$(CONFIG_SOC_AT91SAM9) += at91sam9g45.o dt-compat.o +obj-$(CONFIG_SOC_AT91SAM9) += at91sam9n12.o at91sam9x5.o dt-compat.o +obj-$(CONFIG_SOC_SAM9X60) += sam9x60.o +obj-$(CONFIG_SOC_SAM9X7) += sam9x7.o +obj-$(CONFIG_SOC_SAMA5D3) += sama5d3.o dt-compat.o +obj-$(CONFIG_SOC_SAMA5D4) += sama5d4.o dt-compat.o +obj-$(CONFIG_SOC_SAMA5D2) += sama5d2.o dt-compat.o +obj-$(CONFIG_SOC_SAMA7D65) += sama7d65.o +obj-$(CONFIG_SOC_SAMA7G5) += sama7g5.o -- cgit v1.3.1