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/accel/ivpu/Makefile | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 drivers/accel/ivpu/Makefile (limited to 'drivers/accel/ivpu/Makefile') diff --git a/drivers/accel/ivpu/Makefile b/drivers/accel/ivpu/Makefile new file mode 100644 index 000000000..dbf76b8a5 --- /dev/null +++ b/drivers/accel/ivpu/Makefile @@ -0,0 +1,30 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Copyright (C) 2023-2024 Intel Corporation + +intel_vpu-y := \ + ivpu_drv.o \ + ivpu_fw.o \ + ivpu_fw_log.o \ + ivpu_gem.o \ + ivpu_gem_userptr.o \ + ivpu_hw.o \ + ivpu_hw_btrs.o \ + ivpu_hw_ip.o \ + ivpu_ipc.o \ + ivpu_job.o \ + ivpu_jsm_msg.o \ + ivpu_mmu.o \ + ivpu_mmu_context.o \ + ivpu_ms.o \ + ivpu_pm.o \ + ivpu_sysfs.o \ + ivpu_trace_points.o + +intel_vpu-$(CONFIG_DEBUG_FS) += ivpu_debugfs.o +intel_vpu-$(CONFIG_DEV_COREDUMP) += ivpu_coredump.o + +obj-$(CONFIG_DRM_ACCEL_IVPU) += intel_vpu.o + +subdir-ccflags-$(CONFIG_DRM_ACCEL_IVPU_DEBUG) += -DDEBUG + +CFLAGS_ivpu_trace_points.o = -I$(src) -- cgit v1.3.1