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/sctp/Makefile | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 net/sctp/Makefile (limited to 'net/sctp/Makefile') diff --git a/net/sctp/Makefile b/net/sctp/Makefile new file mode 100644 index 000000000..044839840 --- /dev/null +++ b/net/sctp/Makefile @@ -0,0 +1,25 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for SCTP support code. +# + +obj-$(CONFIG_IP_SCTP) += sctp.o +obj-$(CONFIG_INET_SCTP_DIAG) += sctp_diag.o + +sctp-y := sm_statetable.o sm_statefuns.o sm_sideeffect.o \ + protocol.o endpointola.o associola.o \ + transport.o chunk.o sm_make_chunk.o ulpevent.o \ + inqueue.o outqueue.o ulpqueue.o \ + tsnmap.o bind_addr.o socket.o primitive.o \ + output.o input.o debug.o stream.o auth.o \ + offload.o stream_sched.o stream_sched_prio.o \ + stream_sched_rr.o stream_sched_fc.o \ + stream_interleave.o + +sctp_diag-y := diag.o + +sctp-$(CONFIG_SCTP_DBG_OBJCNT) += objcnt.o +sctp-$(CONFIG_PROC_FS) += proc.o +sctp-$(CONFIG_SYSCTL) += sysctl.o + +sctp-$(subst m,y,$(CONFIG_IPV6)) += ipv6.o -- cgit v1.3.1