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/acpi/arm64/init.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 drivers/acpi/arm64/init.c (limited to 'drivers/acpi/arm64/init.c') diff --git a/drivers/acpi/arm64/init.c b/drivers/acpi/arm64/init.c new file mode 100644 index 000000000..7a47d8095 --- /dev/null +++ b/drivers/acpi/arm64/init.c @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include +#include "init.h" + +void __init acpi_arch_init(void) +{ + if (IS_ENABLED(CONFIG_ACPI_AGDI)) + acpi_agdi_init(); + if (IS_ENABLED(CONFIG_ACPI_APMT)) + acpi_apmt_init(); + if (IS_ENABLED(CONFIG_ACPI_IORT)) + acpi_iort_init(); + if (IS_ENABLED(CONFIG_ARM_AMBA)) + acpi_amba_init(); +} -- cgit v1.3.1