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/pinctrl/berlin/berlin-bg2cd.c | 186 ++++++++++++++++++++++++++++++++++ 1 file changed, 186 insertions(+) create mode 100644 drivers/pinctrl/berlin/berlin-bg2cd.c (limited to 'drivers/pinctrl/berlin/berlin-bg2cd.c') diff --git a/drivers/pinctrl/berlin/berlin-bg2cd.c b/drivers/pinctrl/berlin/berlin-bg2cd.c new file mode 100644 index 000000000..73a1d8c23 --- /dev/null +++ b/drivers/pinctrl/berlin/berlin-bg2cd.c @@ -0,0 +1,186 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Marvell Berlin BG2CD pinctrl driver. + * + * Copyright (C) 2014 Marvell Technology Group Ltd. + * + * Antoine Ténart + */ + +#include +#include +#include +#include +#include + +#include "berlin.h" + +static const struct berlin_desc_group berlin2cd_soc_pinctrl_groups[] = { + /* G */ + BERLIN_PINCTRL_GROUP("G0", 0x00, 0x3, 0x00, + BERLIN_PINCTRL_FUNCTION(0x0, "jtag"), + BERLIN_PINCTRL_FUNCTION(0x1, "gpio"), + BERLIN_PINCTRL_FUNCTION(0x2, "led"), + BERLIN_PINCTRL_FUNCTION(0x3, "pwm")), + BERLIN_PINCTRL_GROUP("G1", 0x00, 0x3, 0x03, + BERLIN_PINCTRL_FUNCTION(0x0, "gpio"), + BERLIN_PINCTRL_FUNCTION(0x1, "sd0"), + BERLIN_PINCTRL_FUNCTION(0x6, "usb0_dbg"), + BERLIN_PINCTRL_FUNCTION(0x7, "usb1_dbg")), + BERLIN_PINCTRL_GROUP("G2", 0x00, 0x3, 0x06, + BERLIN_PINCTRL_FUNCTION(0x0, "gpio"), + BERLIN_PINCTRL_FUNCTION(0x1, "sd0"), + BERLIN_PINCTRL_FUNCTION(0x2, "fe"), + BERLIN_PINCTRL_FUNCTION(0x3, "pll"), + BERLIN_PINCTRL_FUNCTION(0x6, "usb0_dbg"), + BERLIN_PINCTRL_FUNCTION(0x7, "usb1_dbg")), + BERLIN_PINCTRL_GROUP("G3", 0x00, 0x3, 0x09, + BERLIN_PINCTRL_FUNCTION(0x0, "gpio"), + BERLIN_PINCTRL_FUNCTION(0x1, "sd0"), + BERLIN_PINCTRL_FUNCTION(0x2, "twsi2"), + BERLIN_PINCTRL_FUNCTION(0x3, "pll"), + BERLIN_PINCTRL_FUNCTION(0x4, "fe"), + BERLIN_PINCTRL_FUNCTION(0x6, "usb0_dbg"), + BERLIN_PINCTRL_FUNCTION(0x7, "usb1_dbg")), + BERLIN_PINCTRL_GROUP("G4", 0x00, 0x3, 0x0c, + BERLIN_PINCTRL_FUNCTION(0x0, "gpio"), + BERLIN_PINCTRL_FUNCTION(0x1, "sd0"), + BERLIN_PINCTRL_FUNCTION(0x2, "twsi3"), + BERLIN_PINCTRL_FUNCTION(0x3, "pll"), + BERLIN_PINCTRL_FUNCTION(0x4, "pwm"), + BERLIN_PINCTRL_FUNCTION(0x6, "usb0_dbg"), + BERLIN_PINCTRL_FUNCTION(0x7, "usb1_dbg")), + BERLIN_PINCTRL_GROUP("G5", 0x00, 0x3, 0x0f, + BERLIN_PINCTRL_FUNCTION(0x0, "gpio"), + BERLIN_PINCTRL_FUNCTION(0x1, "sd0"), + BERLIN_PINCTRL_FUNCTION(0x2, "twsi3"), + BERLIN_PINCTRL_FUNCTION(0x3, "arc"), + BERLIN_PINCTRL_FUNCTION(0x4, "pwm"), + BERLIN_PINCTRL_FUNCTION(0x6, "usb0_dbg"), + BERLIN_PINCTRL_FUNCTION(0x7, "usb1_dbg")), + BERLIN_PINCTRL_GROUP("G6", 0x00, 0x3, 0x12, + BERLIN_PINCTRL_FUNCTION(0x0, "uart0"), /* RX/TX */ + BERLIN_PINCTRL_FUNCTION(0x1, "gpio")), + BERLIN_PINCTRL_GROUP("G7", 0x00, 0x3, 0x15, + BERLIN_PINCTRL_FUNCTION(0x0, "eddc"), + BERLIN_PINCTRL_FUNCTION(0x1, "twsi1"), + BERLIN_PINCTRL_FUNCTION(0x2, "gpio")), + BERLIN_PINCTRL_GROUP("G8", 0x00, 0x3, 0x18, + BERLIN_PINCTRL_FUNCTION(0x0, "spi1"), /* SS0n */ + BERLIN_PINCTRL_FUNCTION(0x1, "gpio")), + BERLIN_PINCTRL_GROUP("G9", 0x00, 0x3, 0x1b, + BERLIN_PINCTRL_FUNCTION(0x0, "gpio"), + BERLIN_PINCTRL_FUNCTION(0x1, "spi1"), /* SS1n/SS2n */ + BERLIN_PINCTRL_FUNCTION(0x3, "twsi0")), + BERLIN_PINCTRL_GROUP("G10", 0x00, 0x2, 0x1e, + BERLIN_PINCTRL_FUNCTION(0x0, "spi1"), /* CLK */ + BERLIN_PINCTRL_FUNCTION(0x1, "gpio")), + BERLIN_PINCTRL_GROUP("G11", 0x04, 0x2, 0x00, + BERLIN_PINCTRL_FUNCTION(0x0, "spi1"), /* SDI/SDO */ + BERLIN_PINCTRL_FUNCTION(0x1, "gpio")), + BERLIN_PINCTRL_GROUP("G12", 0x04, 0x3, 0x02, + BERLIN_PINCTRL_FUNCTION(0x0, "usb1"), + BERLIN_PINCTRL_FUNCTION(0x1, "gpio")), + BERLIN_PINCTRL_GROUP("G13", 0x04, 0x3, 0x05, + BERLIN_PINCTRL_FUNCTION(0x0, "nand"), + BERLIN_PINCTRL_FUNCTION(0x1, "usb0_dbg"), + BERLIN_PINCTRL_FUNCTION(0x2, "usb1_dbg")), + BERLIN_PINCTRL_GROUP("G14", 0x04, 0x1, 0x08, + BERLIN_PINCTRL_FUNCTION(0x0, "nand"), + BERLIN_PINCTRL_FUNCTION(0x1, "gpio")), + BERLIN_PINCTRL_GROUP("G15", 0x04, 0x3, 0x09, + BERLIN_PINCTRL_FUNCTION(0x0, "jtag"), + BERLIN_PINCTRL_FUNCTION(0x1, "gpio")), + BERLIN_PINCTRL_GROUP("G16", 0x04, 0x3, 0x0c, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G17", 0x04, 0x3, 0x0f, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G18", 0x04, 0x2, 0x12, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G19", 0x04, 0x2, 0x14, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G20", 0x04, 0x2, 0x16, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G21", 0x04, 0x3, 0x18, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G22", 0x04, 0x3, 0x1b, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G23", 0x08, 0x3, 0x00, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G24", 0x08, 0x2, 0x03, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G25", 0x08, 0x2, 0x05, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G26", 0x08, 0x1, 0x07, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G27", 0x08, 0x2, 0x08, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G28", 0x08, 0x3, 0x0a, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("G29", 0x08, 0x3, 0x0d, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), +}; + +static const struct berlin_desc_group berlin2cd_sysmgr_pinctrl_groups[] = { + /* GSM */ + BERLIN_PINCTRL_GROUP("GSM0", 0x40, 0x2, 0x00, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("GSM1", 0x40, 0x2, 0x02, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("GSM2", 0x40, 0x2, 0x04, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("GSM3", 0x40, 0x2, 0x06, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("GSM4", 0x40, 0x2, 0x08, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("GSM5", 0x40, 0x2, 0x0a, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("GSM6", 0x40, 0x2, 0x0c, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("GSM7", 0x40, 0x1, 0x0e, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("GSM8", 0x40, 0x1, 0x0f, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("GSM9", 0x40, 0x1, 0x10, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("GSM10", 0x40, 0x1, 0x11, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), + BERLIN_PINCTRL_GROUP("GSM11", 0x40, 0x1, 0x12, + BERLIN_PINCTRL_FUNCTION_UNKNOWN), +}; + +static const struct berlin_pinctrl_desc berlin2cd_soc_pinctrl_data = { + .groups = berlin2cd_soc_pinctrl_groups, + .ngroups = ARRAY_SIZE(berlin2cd_soc_pinctrl_groups), +}; + +static const struct berlin_pinctrl_desc berlin2cd_sysmgr_pinctrl_data = { + .groups = berlin2cd_sysmgr_pinctrl_groups, + .ngroups = ARRAY_SIZE(berlin2cd_sysmgr_pinctrl_groups), +}; + +static const struct of_device_id berlin2cd_pinctrl_match[] = { + { + .compatible = "marvell,berlin2cd-soc-pinctrl", + .data = &berlin2cd_soc_pinctrl_data + }, + { + .compatible = "marvell,berlin2cd-system-pinctrl", + .data = &berlin2cd_sysmgr_pinctrl_data + }, + {} +}; + +static int berlin2cd_pinctrl_probe(struct platform_device *pdev) +{ + return berlin_pinctrl_probe(pdev, device_get_match_data(&pdev->dev)); +} + +static struct platform_driver berlin2cd_pinctrl_driver = { + .probe = berlin2cd_pinctrl_probe, + .driver = { + .name = "berlin-bg2cd-pinctrl", + .of_match_table = berlin2cd_pinctrl_match, + }, +}; +builtin_platform_driver(berlin2cd_pinctrl_driver); -- cgit v1.3.1