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 --- net/openvswitch/Makefile | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 net/openvswitch/Makefile (limited to 'net/openvswitch/Makefile') diff --git a/net/openvswitch/Makefile b/net/openvswitch/Makefile new file mode 100644 index 000000000..28982630b --- /dev/null +++ b/net/openvswitch/Makefile @@ -0,0 +1,29 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for Open vSwitch. +# + +obj-$(CONFIG_OPENVSWITCH) += openvswitch.o + +openvswitch-y := \ + actions.o \ + datapath.o \ + dp_notify.o \ + flow.o \ + flow_netlink.o \ + flow_table.o \ + meter.o \ + openvswitch_trace.o \ + vport.o \ + vport-internal_dev.o \ + vport-netdev.o + +ifneq ($(CONFIG_NF_CONNTRACK),) +openvswitch-y += conntrack.o +endif + +obj-$(CONFIG_OPENVSWITCH_VXLAN)+= vport-vxlan.o +obj-$(CONFIG_OPENVSWITCH_GENEVE)+= vport-geneve.o +obj-$(CONFIG_OPENVSWITCH_GRE) += vport-gre.o + +CFLAGS_openvswitch_trace.o = -I$(src) -- cgit v1.3.1