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 --- arch/m68k/Kbuild | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 arch/m68k/Kbuild (limited to 'arch/m68k/Kbuild') diff --git a/arch/m68k/Kbuild b/arch/m68k/Kbuild new file mode 100644 index 000000000..7762af9f6 --- /dev/null +++ b/arch/m68k/Kbuild @@ -0,0 +1,20 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-y += kernel/ mm/ +obj-$(CONFIG_Q40) += q40/ +obj-$(CONFIG_AMIGA) += amiga/ +obj-$(CONFIG_ATARI) += atari/ +obj-$(CONFIG_MAC) += mac/ +obj-$(CONFIG_HP300) += hp300/ +obj-$(CONFIG_APOLLO) += apollo/ +obj-$(CONFIG_MVME147) += mvme147/ +obj-$(CONFIG_MVME16x) += mvme16x/ +obj-$(CONFIG_BVME6000) += bvme6000/ +obj-$(CONFIG_SUN3X) += sun3x/ sun3/ +obj-$(CONFIG_SUN3) += sun3/ +obj-$(CONFIG_NATFEAT) += emu/ +obj-$(CONFIG_M68040) += fpsp040/ +obj-$(CONFIG_M68060) += ifpsp060/ +obj-$(CONFIG_M68KFPU_EMU) += math-emu/ +obj-$(CONFIG_M68000) += 68000/ +obj-$(CONFIG_COLDFIRE) += coldfire/ +obj-$(CONFIG_VIRT) += virt/ -- cgit v1.3.1