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/net/can/Makefile | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 drivers/net/can/Makefile (limited to 'drivers/net/can/Makefile') diff --git a/drivers/net/can/Makefile b/drivers/net/can/Makefile new file mode 100644 index 000000000..4010d17f8 --- /dev/null +++ b/drivers/net/can/Makefile @@ -0,0 +1,39 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Linux Controller Area Network drivers. +# + +obj-$(CONFIG_CAN_VCAN) += vcan.o +obj-$(CONFIG_CAN_VXCAN) += vxcan.o +obj-$(CONFIG_CAN_SLCAN) += slcan/ + +obj-y += dev/ +obj-y += esd/ +obj-y += rcar/ +obj-y += rockchip/ +obj-y += spi/ +obj-y += usb/ +obj-y += softing/ + +obj-$(CONFIG_CAN_AT91) += at91_can.o +obj-$(CONFIG_CAN_BXCAN) += bxcan.o +obj-$(CONFIG_CAN_CAN327) += can327.o +obj-$(CONFIG_CAN_CC770) += cc770/ +obj-$(CONFIG_CAN_C_CAN) += c_can/ +obj-$(CONFIG_CAN_CTUCANFD) += ctucanfd/ +obj-$(CONFIG_CAN_DUMMY) += dummy_can.o +obj-$(CONFIG_CAN_FLEXCAN) += flexcan/ +obj-$(CONFIG_CAN_GRCAN) += grcan.o +obj-$(CONFIG_CAN_IFI_CANFD) += ifi_canfd/ +obj-$(CONFIG_CAN_JANZ_ICAN3) += janz-ican3.o +obj-$(CONFIG_CAN_KVASER_PCIEFD) += kvaser_pciefd/ +obj-$(CONFIG_CAN_MSCAN) += mscan/ +obj-$(CONFIG_CAN_M_CAN) += m_can/ +obj-$(CONFIG_CAN_PEAK_PCIEFD) += peak_canfd/ +obj-$(CONFIG_CAN_SJA1000) += sja1000/ +obj-$(CONFIG_CAN_SUN4I) += sun4i_can.o +obj-$(CONFIG_CAN_TI_HECC) += ti_hecc.o +obj-$(CONFIG_CAN_VIRTIO_CAN) += virtio_can.o +obj-$(CONFIG_CAN_XILINXCAN) += xilinx_can.o + +subdir-ccflags-$(CONFIG_CAN_DEBUG_DEVICES) += -DDEBUG -- cgit v1.3.1