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/phy/mediatek/Makefile | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 drivers/phy/mediatek/Makefile (limited to 'drivers/phy/mediatek/Makefile') diff --git a/drivers/phy/mediatek/Makefile b/drivers/phy/mediatek/Makefile new file mode 100644 index 000000000..1b8088df7 --- /dev/null +++ b/drivers/phy/mediatek/Makefile @@ -0,0 +1,24 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the phy drivers. +# + +obj-$(CONFIG_PHY_MTK_DP) += phy-mtk-dp.o +obj-$(CONFIG_PHY_MTK_PCIE) += phy-mtk-pcie.o +obj-$(CONFIG_PHY_MTK_TPHY) += phy-mtk-tphy.o +obj-$(CONFIG_PHY_MTK_UFS) += phy-mtk-ufs.o +obj-$(CONFIG_PHY_MTK_XSPHY) += phy-mtk-xsphy.o +obj-$(CONFIG_PHY_MTK_XFI_TPHY) += phy-mtk-xfi-tphy.o + +phy-mtk-hdmi-drv-y := phy-mtk-hdmi.o +phy-mtk-hdmi-drv-y += phy-mtk-hdmi-mt2701.o +phy-mtk-hdmi-drv-y += phy-mtk-hdmi-mt8173.o +phy-mtk-hdmi-drv-y += phy-mtk-hdmi-mt8195.o +obj-$(CONFIG_PHY_MTK_HDMI) += phy-mtk-hdmi-drv.o + +obj-$(CONFIG_PHY_MTK_MIPI_CSI_0_5) += phy-mtk-mipi-csi-0-5.o + +phy-mtk-mipi-dsi-drv-y := phy-mtk-mipi-dsi.o +phy-mtk-mipi-dsi-drv-y += phy-mtk-mipi-dsi-mt8173.o +phy-mtk-mipi-dsi-drv-y += phy-mtk-mipi-dsi-mt8183.o +obj-$(CONFIG_PHY_MTK_MIPI_DSI) += phy-mtk-mipi-dsi-drv.o -- cgit v1.3.1