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/soc/Kconfig | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 drivers/soc/Kconfig (limited to 'drivers/soc/Kconfig') diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig new file mode 100644 index 000000000..a2d65adff --- /dev/null +++ b/drivers/soc/Kconfig @@ -0,0 +1,35 @@ +# SPDX-License-Identifier: GPL-2.0-only +menu "SOC (System On Chip) specific Drivers" + +source "drivers/soc/amlogic/Kconfig" +source "drivers/soc/apple/Kconfig" +source "drivers/soc/aspeed/Kconfig" +source "drivers/soc/atmel/Kconfig" +source "drivers/soc/bcm/Kconfig" +source "drivers/soc/canaan/Kconfig" +source "drivers/soc/cirrus/Kconfig" +source "drivers/soc/fsl/Kconfig" +source "drivers/soc/fujitsu/Kconfig" +source "drivers/soc/hisilicon/Kconfig" +source "drivers/soc/imx/Kconfig" +source "drivers/soc/ixp4xx/Kconfig" +source "drivers/soc/litex/Kconfig" +source "drivers/soc/loongson/Kconfig" +source "drivers/soc/mediatek/Kconfig" +source "drivers/soc/microchip/Kconfig" +source "drivers/soc/nuvoton/Kconfig" +source "drivers/soc/pxa/Kconfig" +source "drivers/soc/qcom/Kconfig" +source "drivers/soc/renesas/Kconfig" +source "drivers/soc/rockchip/Kconfig" +source "drivers/soc/samsung/Kconfig" +source "drivers/soc/sophgo/Kconfig" +source "drivers/soc/sunxi/Kconfig" +source "drivers/soc/tegra/Kconfig" +source "drivers/soc/ti/Kconfig" +source "drivers/soc/ux500/Kconfig" +source "drivers/soc/versatile/Kconfig" +source "drivers/soc/vt8500/Kconfig" +source "drivers/soc/xilinx/Kconfig" + +endmenu -- cgit v1.3.1