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/fpsp040/Makefile | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 arch/m68k/fpsp040/Makefile (limited to 'arch/m68k/fpsp040/Makefile') diff --git a/arch/m68k/fpsp040/Makefile b/arch/m68k/fpsp040/Makefile new file mode 100644 index 000000000..834ae9471 --- /dev/null +++ b/arch/m68k/fpsp040/Makefile @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for Linux arch/m68k/fpsp040 source directory +# + +obj-y := bindec.o binstr.o decbin.o do_func.o gen_except.o get_op.o \ + kernel_ex.o res_func.o round.o sacos.o sasin.o satan.o satanh.o \ + scosh.o setox.o sgetem.o sint.o slog2.o slogn.o \ + smovecr.o srem_mod.o scale.o \ + ssin.o ssinh.o stan.o stanh.o sto_res.o stwotox.o tbldo.o util.o \ + x_bsun.o x_fline.o x_operr.o x_ovfl.o x_snan.o x_store.o \ + x_unfl.o x_unimp.o x_unsupp.o bugfix.o skeleton.o -- cgit v1.3.1