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/usb/cdns3/Makefile | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 drivers/usb/cdns3/Makefile (limited to 'drivers/usb/cdns3/Makefile') diff --git a/drivers/usb/cdns3/Makefile b/drivers/usb/cdns3/Makefile new file mode 100644 index 000000000..b2e4ba6a4 --- /dev/null +++ b/drivers/usb/cdns3/Makefile @@ -0,0 +1,30 @@ +# SPDX-License-Identifier: GPL-2.0 +# define_trace.h needs to know how to find our header +CFLAGS_cdns3-trace.o := -I$(src) +CFLAGS_cdnsp-trace.o := -I$(src) + +obj-$(CONFIG_USB_CDNS3) += cdns.o + +cdns-y := core.o drd.o cdns3-plat.o +cdns-$(CONFIG_USB_CDNS3_HOST) += host.o + +ifneq ($(CONFIG_USB_CDNS3_GADGET),) +cdns-y += cdns3-gadget.o cdns3-ep0.o \ + cdnsp-ring.o cdnsp-gadget.o \ + cdnsp-mem.o cdnsp-ep0.o +endif + +ifneq ($(CONFIG_TRACING),) +ifneq ($(CONFIG_USB_CDNS3_GADGET),) +cdns-y += cdns3-trace.o cdnsp-trace.o +endif +endif + +## +# Platform-specific glue layers (PCI wrappers, SoC integration) +## +obj-$(CONFIG_USB_CDNS3_PCI_WRAP) += cdns3-pci-wrap.o +obj-$(CONFIG_USB_CDNSP_PCI) += cdnsp-pci.o +obj-$(CONFIG_USB_CDNS3_TI) += cdns3-ti.o +obj-$(CONFIG_USB_CDNS3_IMX) += cdns3-imx.o +obj-$(CONFIG_USB_CDNS3_STARFIVE) += cdns3-starfive.o -- cgit v1.3.1