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/amdxdna/Makefile | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 drivers/accel/amdxdna/Makefile (limited to 'drivers/accel/amdxdna/Makefile') diff --git a/drivers/accel/amdxdna/Makefile b/drivers/accel/amdxdna/Makefile new file mode 100644 index 000000000..05cce0a38 --- /dev/null +++ b/drivers/accel/amdxdna/Makefile @@ -0,0 +1,34 @@ +# SPDX-License-Identifier: GPL-2.0-only + +amdxdna-y := \ + aie.o \ + aie_psp.o \ + aie_smu.o \ + aie2_ctx.o \ + aie2_error.o \ + aie2_message.o \ + aie2_pci.o \ + aie2_pm.o \ + aie2_solver.o \ + aie4_ctx.o \ + aie4_message.o \ + aie4_pci.o \ + amdxdna_cbuf.o \ + amdxdna_ctx.o \ + amdxdna_gem.o \ + amdxdna_iommu.o \ + amdxdna_mailbox.o \ + amdxdna_mailbox_helper.o \ + amdxdna_pci_drv.o \ + amdxdna_pm.o \ + amdxdna_sysfs.o \ + amdxdna_ubuf.o \ + npu1_regs.o \ + npu3_regs.o \ + npu4_regs.o \ + npu5_regs.o \ + npu6_regs.o + +amdxdna-$(CONFIG_PCI_IOV) += aie4_sriov.o +amdxdna-$(CONFIG_DEBUG_FS) += amdxdna_debugfs.o +obj-$(CONFIG_DRM_ACCEL_AMDXDNA) = amdxdna.o -- cgit v1.3.1