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/mips/bcm63xx/Makefile | 8 ++++++++ 1 file changed, 8 insertions(+) create mode 100644 arch/mips/bcm63xx/Makefile (limited to 'arch/mips/bcm63xx/Makefile') diff --git a/arch/mips/bcm63xx/Makefile b/arch/mips/bcm63xx/Makefile new file mode 100644 index 000000000..d89651e53 --- /dev/null +++ b/arch/mips/bcm63xx/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-y += clk.o cpu.o cs.o gpio.o irq.o nvram.o prom.o reset.o \ + setup.o timer.o dev-enet.o dev-flash.o dev-pcmcia.o \ + dev-rng.o dev-spi.o dev-hsspi.o dev-uart.o dev-wdt.o \ + dev-usb-usbd.o +obj-$(CONFIG_EARLY_PRINTK) += early_printk.o + +obj-y += boards/ -- cgit v1.3.1