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/bcm/Makefile | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 drivers/pinctrl/bcm/Makefile (limited to 'drivers/pinctrl/bcm/Makefile') diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile new file mode 100644 index 000000000..482d769b1 --- /dev/null +++ b/drivers/pinctrl/bcm/Makefile @@ -0,0 +1,21 @@ +# SPDX-License-Identifier: GPL-2.0 +# Broadcom pinctrl support + +obj-$(CONFIG_PINCTRL_BCM281XX) += pinctrl-bcm281xx.o +obj-$(CONFIG_PINCTRL_BCM2835) += pinctrl-bcm2835.o +obj-$(CONFIG_PINCTRL_BCM4908) += pinctrl-bcm4908.o +obj-$(CONFIG_PINCTRL_BCM63XX) += pinctrl-bcm63xx.o +obj-$(CONFIG_PINCTRL_BCM6318) += pinctrl-bcm6318.o +obj-$(CONFIG_PINCTRL_BCM6328) += pinctrl-bcm6328.o +obj-$(CONFIG_PINCTRL_BCM6358) += pinctrl-bcm6358.o +obj-$(CONFIG_PINCTRL_BCM6362) += pinctrl-bcm6362.o +obj-$(CONFIG_PINCTRL_BCM6368) += pinctrl-bcm6368.o +obj-$(CONFIG_PINCTRL_BCM63268) += pinctrl-bcm63268.o +obj-$(CONFIG_PINCTRL_BRCMSTB) += pinctrl-brcmstb.o +obj-$(CONFIG_PINCTRL_BCM2712) += pinctrl-brcmstb-bcm2712.o +obj-$(CONFIG_PINCTRL_IPROC_GPIO) += pinctrl-iproc-gpio.o +obj-$(CONFIG_PINCTRL_CYGNUS_MUX) += pinctrl-cygnus-mux.o +obj-$(CONFIG_PINCTRL_NS) += pinctrl-ns.o +obj-$(CONFIG_PINCTRL_NSP_GPIO) += pinctrl-nsp-gpio.o +obj-$(CONFIG_PINCTRL_NS2_MUX) += pinctrl-ns2-mux.o +obj-$(CONFIG_PINCTRL_NSP_MUX) += pinctrl-nsp-mux.o -- cgit v1.3.1