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/input/serio/Makefile | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 drivers/input/serio/Makefile (limited to 'drivers/input/serio/Makefile') diff --git a/drivers/input/serio/Makefile b/drivers/input/serio/Makefile new file mode 100644 index 000000000..7f5137dc0 --- /dev/null +++ b/drivers/input/serio/Makefile @@ -0,0 +1,33 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the input core drivers. +# + +# Each configuration option enables a list of files. + +obj-$(CONFIG_SERIO) += serio.o +obj-$(CONFIG_SERIO_I8042) += i8042.o +obj-$(CONFIG_SERIO_PARKBD) += parkbd.o +obj-$(CONFIG_SERIO_SERPORT) += serport.o +obj-$(CONFIG_SERIO_RPCKBD) += rpckbd.o +obj-$(CONFIG_SERIO_SA1111) += sa1111ps2.o +obj-$(CONFIG_SERIO_AMBAKMI) += ambakmi.o +obj-$(CONFIG_SERIO_Q40KBD) += q40kbd.o +obj-$(CONFIG_SERIO_GSCPS2) += gscps2.o +obj-$(CONFIG_HP_SDC) += hp_sdc.o +obj-$(CONFIG_HIL_MLC) += hp_sdc_mlc.o hil_mlc.o +obj-$(CONFIG_SERIO_PCIPS2) += pcips2.o +obj-$(CONFIG_SERIO_PS2MULT) += ps2mult.o +obj-$(CONFIG_SERIO_MACEPS2) += maceps2.o +obj-$(CONFIG_SERIO_SGI_IOC3) += ioc3kbd.o +obj-$(CONFIG_SERIO_LIBPS2) += libps2.o +obj-$(CONFIG_SERIO_RAW) += serio_raw.o +obj-$(CONFIG_SERIO_AMS_DELTA) += ams_delta_serio.o +obj-$(CONFIG_SERIO_ALTERA_PS2) += altera_ps2.o +obj-$(CONFIG_SERIO_ARC_PS2) += arc_ps2.o +obj-$(CONFIG_SERIO_APBPS2) += apbps2.o +obj-$(CONFIG_SERIO_OLPC_APSP) += olpc_apsp.o +obj-$(CONFIG_HYPERV_KEYBOARD) += hyperv-keyboard.o +obj-$(CONFIG_SERIO_SUN4I_PS2) += sun4i-ps2.o +obj-$(CONFIG_SERIO_GPIO_PS2) += ps2-gpio.o +obj-$(CONFIG_USERIO) += userio.o -- cgit v1.3.1