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/aspeed/Kconfig | 56 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 drivers/pinctrl/aspeed/Kconfig (limited to 'drivers/pinctrl/aspeed/Kconfig') diff --git a/drivers/pinctrl/aspeed/Kconfig b/drivers/pinctrl/aspeed/Kconfig new file mode 100644 index 000000000..8e1d4da08 --- /dev/null +++ b/drivers/pinctrl/aspeed/Kconfig @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: GPL-2.0-only +config PINCTRL_ASPEED + bool + depends on (ARCH_ASPEED || COMPILE_TEST) && OF + select MFD_SYSCON + select PINMUX + select PINCONF + select GENERIC_PINCONF + select REGMAP_MMIO + +config PINCTRL_ASPEED_G4 + bool "Aspeed G4 SoC pin control" + depends on (MACH_ASPEED_G4 || COMPILE_TEST) && OF + select PINCTRL_ASPEED + help + Say Y here to enable pin controller support for Aspeed's 4th + generation SoCs. GPIO is provided by a separate GPIO driver. + +config PINCTRL_ASPEED_G5 + bool "Aspeed G5 SoC pin control" + depends on (MACH_ASPEED_G5 || COMPILE_TEST) && OF + select PINCTRL_ASPEED + help + Say Y here to enable pin controller support for Aspeed's 5th + generation SoCs. GPIO is provided by a separate GPIO driver. + +config PINCTRL_ASPEED_G6 + bool "Aspeed G6 SoC pin control" + depends on (MACH_ASPEED_G6 || COMPILE_TEST) && OF + select PINCTRL_ASPEED + help + Say Y here to enable pin controller support for Aspeed's 6th + generation SoCs. GPIO is provided by a separate GPIO driver. + +config PINCTRL_ASPEED_G7_SOC0 + bool "Aspeed G7 SoC pin control" + depends on (ARCH_ASPEED || COMPILE_TEST) && OF + select PINCTRL_ASPEED + help + Say Y here to enable pin controller support for the SoC0 instance + of Aspeed's 7th generation SoCs. GPIO is provided by a separate + GPIO driver. + +config PINCTRL_ASPEED_G7_SOC1 + bool "Aspeed G7 SoC1 pin control" + depends on (ARCH_ASPEED || COMPILE_TEST) && OF + select MFD_SYSCON + select PINMUX + select GENERIC_PINCTRL_GROUPS + select GENERIC_PINMUX_FUNCTIONS + select GENERIC_PINCONF + select REGMAP_MMIO + help + Say Y here to enable pin controller support for the SoC1 instance + of Aspeed's 7th generation SoCs. GPIO is provided by a separate + GPIO driver. -- cgit v1.3.1