From 78004e9a87f240df03e2f73120d291763c32e0a7 Mon Sep 17 00:00:00 2001 From: Ali Ahmet Memis Date: Fri, 21 Aug 2026 01:45:27 +0000 Subject: openrisc: fix arbitrary kernel memory access via or1k_atomic syscall sys_or1k_atomic() (syscall 244 in the "or1k" ABI) takes two user pointers, v1 and v2, and swaps the words they point to in hand-written assembly. l.lwz r29,0(r4) l.lwz r27,0(r5) l.sw 0(r4),r27 l.sw 0(r5),r29 The pointers are not checked with access_ok(). The four memory accesses also have no exception table entries. A caller passes a kernel address as either pointer, and the syscall reads from and writes to it directly. This gives an unprivileged process a kernel read/write primitive. It overwrites kernel data such as the sys_call_table, gaining code execution in kernel context. Check both pointers before entering the critical section. Add fixups for the four memory accesses so faults on valid but unmapped user addresses return -EFAULT. [shorne@gmail.com: fix comment style] Fixes: 9d02a4283e9c ("OpenRISC: Boot code") Cc: stable@vger.kernel.org Signed-off-by: Ali Ahmet Memis Signed-off-by: Stafford Horne --- drivers/pinctrl/starfive/Kconfig | 49 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 drivers/pinctrl/starfive/Kconfig (limited to 'drivers/pinctrl/starfive/Kconfig') diff --git a/drivers/pinctrl/starfive/Kconfig b/drivers/pinctrl/starfive/Kconfig new file mode 100644 index 000000000..a9a7cb101 --- /dev/null +++ b/drivers/pinctrl/starfive/Kconfig @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: GPL-2.0-only + +config PINCTRL_STARFIVE_JH7100 + tristate "Pinctrl and GPIO driver for the StarFive JH7100 SoC" + depends on SOC_STARFIVE || COMPILE_TEST + depends on OF + select GENERIC_PINCTRL_GROUPS + select GENERIC_PINMUX_FUNCTIONS + select GENERIC_PINCONF + select GPIOLIB + select GPIOLIB_IRQCHIP + default SOC_STARFIVE + help + Say yes here to support pin control on the StarFive JH7100 SoC. + This also provides an interface to the GPIO pins not used by other + peripherals supporting inputs, outputs, configuring pull-up/pull-down + and interrupts on input changes. + +config PINCTRL_STARFIVE_JH7110 + bool + select GENERIC_PINCTRL_GROUPS + select GENERIC_PINMUX_FUNCTIONS + select GENERIC_PINCONF + select GPIOLIB + select GPIOLIB_IRQCHIP + +config PINCTRL_STARFIVE_JH7110_SYS + tristate "System pinctrl and GPIO driver for the StarFive JH7110 SoC" + depends on SOC_STARFIVE || COMPILE_TEST + depends on OF + select PINCTRL_STARFIVE_JH7110 + default SOC_STARFIVE + help + Say yes here to support system pin control on the StarFive JH7110 SoC. + This also provides an interface to the GPIO pins not used by other + peripherals supporting inputs, outputs, configuring pull-up/pull-down + and interrupts on input changes. + +config PINCTRL_STARFIVE_JH7110_AON + tristate "Always-on pinctrl and GPIO driver for the StarFive JH7110 SoC" + depends on SOC_STARFIVE || COMPILE_TEST + depends on OF + select PINCTRL_STARFIVE_JH7110 + default SOC_STARFIVE + help + Say yes here to support always-on pin control on the StarFive JH7110 SoC. + This also provides an interface to the GPIO pins not used by other + peripherals supporting inputs, outputs, configuring pull-up/pull-down + and interrupts on input changes. -- cgit v1.3.1