openrisc: fix arbitrary kernel memory access via or1k_atomic syscallgrafted

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 <ali@iusegentoo.com>
Signed-off-by: Stafford Horne <shorne@gmail.com>

1 files changed, 146 insertions, 0 deletions

diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig
new file mode 100644
index 000000000..14698571b
--- /dev/null
+++ b/drivers/phy/rockchip/Kconfig
@@ -0,0 +1,146 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Phy drivers for Rockchip platforms
+#
+config PHY_ROCKCHIP_DP
+	tristate "Rockchip Display Port PHY Driver"
+	depends on ARCH_ROCKCHIP && OF
+	select GENERIC_PHY
+	help
+	  Enable this to support the Rockchip Display Port PHY.
+
+config PHY_ROCKCHIP_DPHY_RX0
+	tristate "Rockchip MIPI Synopsys DPHY RX0 driver"
+	depends on ARCH_ROCKCHIP || COMPILE_TEST
+	select GENERIC_PHY_MIPI_DPHY
+	select GENERIC_PHY
+	help
+	  Enable this to support the Rockchip MIPI Synopsys DPHY RX0
+	  associated to the Rockchip ISP module present in RK3399 SoCs.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called phy-rockchip-dphy-rx0.
+
+config PHY_ROCKCHIP_EMMC
+	tristate "Rockchip EMMC PHY Driver"
+	depends on ARCH_ROCKCHIP && OF
+	select GENERIC_PHY
+	help
+	  Enable this to support the Rockchip EMMC PHY.
+
+config PHY_ROCKCHIP_INNO_HDMI
+	tristate "Rockchip INNO HDMI PHY Driver"
+	depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF
+	depends on COMMON_CLK
+	depends on HAS_IOMEM
+	select GENERIC_PHY
+	help
+	  Enable this to support the Rockchip Innosilicon HDMI PHY.
+
+config PHY_ROCKCHIP_INNO_USB2
+	tristate "Rockchip INNO USB2PHY Driver"
+	depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF
+	depends on COMMON_CLK
+	depends on EXTCON
+	depends on USB_SUPPORT
+	select GENERIC_PHY
+	select USB_COMMON
+	help
+	  Support for Rockchip USB2.0 PHY with Innosilicon IP block.
+
+config PHY_ROCKCHIP_INNO_CSIDPHY
+	tristate "Rockchip Innosilicon MIPI CSI PHY driver"
+	depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF
+	select GENERIC_PHY
+	select GENERIC_PHY_MIPI_DPHY
+	help
+	  Enable this to support the Rockchip MIPI CSI PHY with
+	  Innosilicon IP block.
+
+config PHY_ROCKCHIP_INNO_DSIDPHY
+	tristate "Rockchip Innosilicon MIPI/LVDS/TTL PHY driver"
+	depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF
+	select GENERIC_PHY
+	select GENERIC_PHY_MIPI_DPHY
+	help
+	  Enable this to support the Rockchip MIPI/LVDS/TTL PHY with
+	  Innosilicon IP block.
+
+config PHY_ROCKCHIP_NANENG_COMBO_PHY
+	tristate "Rockchip NANENG COMBO PHY Driver"
+	depends on ARCH_ROCKCHIP && OF
+	select GENERIC_PHY
+	help
+	  Enable this to support the Rockchip PCIe/USB3.0/SATA/QSGMII
+	  combo PHY with NaNeng IP block.
+
+config PHY_ROCKCHIP_PCIE
+	tristate "Rockchip PCIe PHY Driver"
+	depends on (ARCH_ROCKCHIP && OF) || COMPILE_TEST
+	depends on HAS_IOMEM
+	select GENERIC_PHY
+	select MFD_SYSCON
+	help
+	  Enable this to support the Rockchip PCIe PHY.
+
+config PHY_ROCKCHIP_SAMSUNG_DCPHY
+	tristate "Rockchip Samsung MIPI DCPHY driver"
+	depends on (ARCH_ROCKCHIP || COMPILE_TEST)
+	select GENERIC_PHY
+	select GENERIC_PHY_MIPI_DPHY
+	help
+	  Enable this to support the Rockchip MIPI DCPHY with
+	  Samsung IP block.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called phy-rockchip-samsung-dcphy
+
+config PHY_ROCKCHIP_SAMSUNG_HDPTX
+	tristate "Rockchip Samsung HDMI/eDP Combo PHY driver"
+	depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF
+	depends on COMMON_CLK
+	depends on HAS_IOMEM
+	select GENERIC_PHY
+	select MFD_SYSCON
+	select RATIONAL
+	help
+	  Enable this to support the Rockchip HDMI/eDP Combo PHY
+	  with Samsung IP block.
+
+config PHY_ROCKCHIP_SNPS_PCIE3
+	tristate "Rockchip Snps PCIe3 PHY Driver"
+	depends on (ARCH_ROCKCHIP && OF) || COMPILE_TEST
+	depends on HAS_IOMEM
+	select GENERIC_PHY
+	select MFD_SYSCON
+	help
+	  Enable this to support the Rockchip snps PCIe3 PHY.
+
+config PHY_ROCKCHIP_TYPEC
+	tristate "Rockchip TYPEC PHY Driver"
+	depends on OF && (ARCH_ROCKCHIP || COMPILE_TEST)
+	select EXTCON
+	select GENERIC_PHY
+	select RESET_CONTROLLER
+	help
+	  Enable this to support the Rockchip USB TYPEC PHY.
+
+config PHY_ROCKCHIP_USB
+	tristate "Rockchip USB2 PHY Driver"
+	depends on ARCH_ROCKCHIP && OF
+	select GENERIC_PHY
+	help
+	  Enable this to support the Rockchip USB 2.0 PHY.
+
+config PHY_ROCKCHIP_USBDP
+	tristate "Rockchip USBDP COMBO PHY Driver"
+	depends on ARCH_ROCKCHIP && OF
+	depends on TYPEC
+	select GENERIC_PHY
+	select USB_COMMON
+	help
+	  Enable this to support the Rockchip USB3.0/DP combo PHY with
+	  Samsung IP block. This is required for USB3 support on RK3588.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called phy-rockchip-usbdp