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/pmdomain/marvell/Kconfig | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 drivers/pmdomain/marvell/Kconfig (limited to 'drivers/pmdomain/marvell/Kconfig') diff --git a/drivers/pmdomain/marvell/Kconfig b/drivers/pmdomain/marvell/Kconfig new file mode 100644 index 000000000..6c4084c82 --- /dev/null +++ b/drivers/pmdomain/marvell/Kconfig @@ -0,0 +1,18 @@ +# SPDX-License-Identifier: GPL-2.0-only + +menu "Marvell PM Domains" + depends on ARCH_MMP || COMPILE_TEST + +config PXA1908_PM_DOMAINS + tristate "Marvell PXA1908 power domains" + depends on OF + depends on PM + default y if ARCH_MMP && ARM64 + select AUXILIARY_BUS + select MFD_SYSCON + select PM_GENERIC_DOMAINS + select PM_GENERIC_DOMAINS_OF + help + Say Y here to enable support for Marvell PXA1908's power domanis. + +endmenu -- cgit v1.3.1