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/pinctrl/spear/Makefile | 11 +++++++++++ 1 file changed, 11 insertions(+) create mode 100644 drivers/pinctrl/spear/Makefile (limited to 'drivers/pinctrl/spear/Makefile') diff --git a/drivers/pinctrl/spear/Makefile b/drivers/pinctrl/spear/Makefile new file mode 100644 index 000000000..da52d1755 --- /dev/null +++ b/drivers/pinctrl/spear/Makefile @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0 +# SPEAr pinmux support + +obj-$(CONFIG_PINCTRL_SPEAR_PLGPIO) += pinctrl-plgpio.o +obj-y += pinctrl-spear.o +obj-$(CONFIG_PINCTRL_SPEAR3XX) += pinctrl-spear3xx.o +obj-$(CONFIG_PINCTRL_SPEAR300) += pinctrl-spear300.o +obj-$(CONFIG_PINCTRL_SPEAR310) += pinctrl-spear310.o +obj-$(CONFIG_PINCTRL_SPEAR320) += pinctrl-spear320.o +obj-$(CONFIG_PINCTRL_SPEAR1310) += pinctrl-spear1310.o +obj-$(CONFIG_PINCTRL_SPEAR1340) += pinctrl-spear1340.o -- cgit v1.3.1