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/hid/intel-ish-hid/Makefile | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 drivers/hid/intel-ish-hid/Makefile (limited to 'drivers/hid/intel-ish-hid/Makefile') diff --git a/drivers/hid/intel-ish-hid/Makefile b/drivers/hid/intel-ish-hid/Makefile new file mode 100644 index 000000000..e1e062e4b --- /dev/null +++ b/drivers/hid/intel-ish-hid/Makefile @@ -0,0 +1,27 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile - Intel ISH HID drivers +# Copyright (c) 2014-2016, Intel Corporation. +# +# +obj-$(CONFIG_INTEL_ISH_HID) += intel-ishtp.o +intel-ishtp-objs := ishtp/init.o +intel-ishtp-objs += ishtp/hbm.o +intel-ishtp-objs += ishtp/client.o +intel-ishtp-objs += ishtp/bus.o +intel-ishtp-objs += ishtp/dma-if.o +intel-ishtp-objs += ishtp/client-buffers.o +intel-ishtp-objs += ishtp/loader.o + +obj-$(CONFIG_INTEL_ISH_HID) += intel-ish-ipc.o +intel-ish-ipc-objs := ipc/ipc.o +intel-ish-ipc-objs += ipc/pci-ish.o + +obj-$(CONFIG_INTEL_ISH_HID) += intel-ishtp-hid.o +intel-ishtp-hid-objs := ishtp-hid.o +intel-ishtp-hid-objs += ishtp-hid-client.o + +obj-$(CONFIG_INTEL_ISH_FIRMWARE_DOWNLOADER) += intel-ishtp-loader.o +intel-ishtp-loader-objs += ishtp-fw-loader.o + +ccflags-y += -I $(src)/ishtp -- cgit v1.3.1