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 --- include/dt-bindings/phy/phy.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 include/dt-bindings/phy/phy.h (limited to 'include/dt-bindings/phy/phy.h') diff --git a/include/dt-bindings/phy/phy.h b/include/dt-bindings/phy/phy.h new file mode 100644 index 000000000..979b5dfd8 --- /dev/null +++ b/include/dt-bindings/phy/phy.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * + * This header provides constants for the phy framework + * + * Copyright (C) 2014 STMicroelectronics + * Author: Gabriel Fernandez + */ + +#ifndef _DT_BINDINGS_PHY +#define _DT_BINDINGS_PHY + +#define PHY_NONE 0 +#define PHY_TYPE_SATA 1 +#define PHY_TYPE_PCIE 2 +#define PHY_TYPE_USB2 3 +#define PHY_TYPE_USB3 4 +#define PHY_TYPE_UFS 5 +#define PHY_TYPE_DP 6 +#define PHY_TYPE_XPCS 7 +#define PHY_TYPE_SGMII 8 +#define PHY_TYPE_QSGMII 9 +#define PHY_TYPE_DPHY 10 +#define PHY_TYPE_CPHY 11 +#define PHY_TYPE_USXGMII 12 +#define PHY_TYPE_XAUI 13 + +#define PHY_POL_NORMAL 0 +#define PHY_POL_INVERT 1 +#define PHY_POL_AUTO 2 + +#endif /* _DT_BINDINGS_PHY */ -- cgit v1.3.1