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/soundwire/Makefile | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 drivers/soundwire/Makefile (limited to 'drivers/soundwire/Makefile') diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile new file mode 100644 index 000000000..e80a2c2cf --- /dev/null +++ b/drivers/soundwire/Makefile @@ -0,0 +1,38 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for soundwire core +# + +#Bus Objs +soundwire-bus-y := bus_type.o bus.o master.o slave.o mipi_disco.o stream.o \ + sysfs_slave.o sysfs_slave_dpn.o +obj-$(CONFIG_SOUNDWIRE) += soundwire-bus.o + +soundwire-generic-allocation-objs := generic_bandwidth_allocation.o +obj-$(CONFIG_SOUNDWIRE_GENERIC_ALLOCATION) += soundwire-generic-allocation.o + +ifdef CONFIG_DEBUG_FS +soundwire-bus-y += debugfs.o +endif + +ifdef CONFIG_IRQ_DOMAIN +soundwire-bus-y += irq.o +endif + +#AMD driver +soundwire-amd-y := amd_init.o amd_manager.o +obj-$(CONFIG_SOUNDWIRE_AMD) += soundwire-amd.o + +#Cadence Objs +soundwire-cadence-y := cadence_master.o +obj-$(CONFIG_SOUNDWIRE_CADENCE) += soundwire-cadence.o + +#Intel driver +soundwire-intel-y := intel.o intel_ace2x.o intel_ace2x_debugfs.o \ + intel_auxdevice.o intel_init.o dmi-quirks.o \ + intel_bus_common.o +obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel.o + +#Qualcomm driver +soundwire-qcom-y := qcom.o +obj-$(CONFIG_SOUNDWIRE_QCOM) += soundwire-qcom.o -- cgit v1.3.1