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/samsung/Makefile | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 drivers/phy/samsung/Makefile (limited to 'drivers/phy/samsung/Makefile') diff --git a/drivers/phy/samsung/Makefile b/drivers/phy/samsung/Makefile new file mode 100644 index 000000000..342682638 --- /dev/null +++ b/drivers/phy/samsung/Makefile @@ -0,0 +1,19 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o +obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o +obj-$(CONFIG_PHY_EXYNOS_PCIE) += phy-exynos-pcie.o +obj-$(CONFIG_PHY_SAMSUNG_UFS) += phy-exynos-ufs.o +phy-exynos-ufs-y += phy-gs101-ufs.o +phy-exynos-ufs-y += phy-samsung-ufs.o +phy-exynos-ufs-y += phy-exynos7-ufs.o +phy-exynos-ufs-y += phy-exynosautov9-ufs.o +phy-exynos-ufs-y += phy-exynosautov920-ufs.o +phy-exynos-ufs-y += phy-fsd-ufs.o +obj-$(CONFIG_PHY_SAMSUNG_USB2) += phy-exynos-usb2.o +phy-exynos-usb2-y += phy-samsung-usb2.o +phy-exynos-usb2-$(CONFIG_PHY_EXYNOS4210_USB2) += phy-exynos4210-usb2.o +phy-exynos-usb2-$(CONFIG_PHY_EXYNOS4X12_USB2) += phy-exynos4x12-usb2.o +phy-exynos-usb2-$(CONFIG_PHY_EXYNOS5250_USB2) += phy-exynos5250-usb2.o +phy-exynos-usb2-$(CONFIG_PHY_S5PV210_USB2) += phy-s5pv210-usb2.o +obj-$(CONFIG_PHY_EXYNOS5_USBDRD) += phy-exynos5-usbdrd.o +obj-$(CONFIG_PHY_EXYNOS5250_SATA) += phy-exynos5250-sata.o -- cgit v1.3.1