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/Kconfig | 115 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 115 insertions(+) create mode 100644 drivers/usb/cdns3/Kconfig (limited to 'drivers/usb/cdns3/Kconfig') diff --git a/drivers/usb/cdns3/Kconfig b/drivers/usb/cdns3/Kconfig new file mode 100644 index 000000000..39ad23d1a --- /dev/null +++ b/drivers/usb/cdns3/Kconfig @@ -0,0 +1,115 @@ +config USB_CDNS_SUPPORT + tristate "Cadence USB Support" + depends on USB_SUPPORT && HAS_DMA + depends on USB || USB_GADGET + depends on USB if !USB_GADGET + depends on USB_GADGET if !USB + select USB_XHCI_PLATFORM if USB_XHCI_HCD + select USB_ROLE_SWITCH + help + Say Y here if your system has a Cadence USBSS or USBSSP + dual-role controller. + It supports: dual-role switch, Host-only, and Peripheral-only. + +if USB_CDNS_SUPPORT + +config USB_CDNS3 + tristate "Cadence USB dual-role controller (USBSS and USBSSP)" + depends on USB_CDNS_SUPPORT + help + Say Y or M here if your system has an on-chip Cadence USB + dual-role controller. This covers both USBSS (USB 3.0) and + USBSSP (SuperSpeed Plus) IP; the driver detects the variant at + runtime. + + The core driver (core, DRD, generic platform binding for the + "cdns,usb3" device tree compatible, optional host and gadget) + builds as one module named cdns.ko when built as a loadable + module. + + It supports: dual-role switch, Host-only, and Peripheral-only. + +if USB_CDNS3 + +config USB_CDNS3_HOST + bool "Cadence USB host controller (xHCI)" + depends on USB=y || USB=USB_CDNS3 + help + Say Y here to enable host controller functionality for Cadence + USBSS and USBSSP dual-role controllers. + + The host controller is xHCI compliant and uses the standard + xHCI driver. + +config USB_CDNS3_GADGET + bool "Cadence USB device controller (USBSS and USBSSP)" + depends on USB_GADGET=y || USB_GADGET=USB_CDNS3 + help + Say Y here to include Cadence USB device (gadget) support for + both USBSS (USB 3.0) and USBSSP (SuperSpeed Plus) IP in the + cdns.ko module. The implementation is selected at runtime from + the detected controller version. + + USBSS gadget supports FF, HS and SS mode (not LS or SSP). + USBSSP gadget supports FF, HS, SS and SSP mode (not LS). + +comment "Platform glue driver support" + +config USB_CDNS3_PCI_WRAP + tristate "Cadence USB3 support on PCIe-based platforms" + depends on USB_PCI && ACPI + default USB_CDNS3 + help + If you're using the USBSS Core IP with a PCIe, please say + 'Y' or 'M' here. + + If you choose to build this driver as module it will + be dynamically linked and module will be called cdns3-pci.ko + +config USB_CDNSP_PCI + tristate "Cadence USBSSP support on PCIe-based platforms" + depends on USB_PCI && ACPI + default USB_CDNS3 + help + If you're using the USBSSP Core IP with a PCIe, please say + 'Y' or 'M' here. + + If you choose to build this driver as module it will + be dynamically linked and module will be called cdnsp-pci.ko + +config USB_CDNS3_TI + tristate "Cadence USB3 support on TI platforms" + depends on ARCH_K3 || COMPILE_TEST + default USB_CDNS3 + help + Say 'Y' or 'M' here if you are building for Texas Instruments + platforms that contain Cadence USB3 controller core. + + e.g. J721e. + +config USB_CDNS3_IMX + tristate "Cadence USB3 support on NXP i.MX platforms" + depends on ARCH_MXC || COMPILE_TEST + default USB_CDNS3 + help + Say 'Y' or 'M' here if you are building for NXP i.MX + platforms that contain Cadence USB3 controller core. + + For example, imx8qm and imx8qxp. + +config USB_CDNS3_STARFIVE + tristate "Cadence USB3 support on StarFive SoC platforms" + depends on ARCH_STARFIVE || COMPILE_TEST + default USB_CDNS3 + help + Say 'Y' or 'M' here if you are building for StarFive SoCs + platforms that contain Cadence USB3 controller core. + + e.g. JH7110. + + If you choose to build this driver as module it will + be dynamically linked and module will be called cdns3-starfive.ko + +endif # USB_CDNS3 + +endif # USB_CDNS_SUPPORT -- cgit v1.3.1