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 --- sound/firewire/Makefile | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 sound/firewire/Makefile (limited to 'sound/firewire/Makefile') diff --git a/sound/firewire/Makefile b/sound/firewire/Makefile new file mode 100644 index 000000000..45018a5c2 --- /dev/null +++ b/sound/firewire/Makefile @@ -0,0 +1,18 @@ +# SPDX-License-Identifier: GPL-2.0 +# To find a header included by define_trace.h. +CFLAGS_amdtp-stream.o := -I$(src) + +snd-firewire-lib-y := lib.o iso-resources.o packets-buffer.o \ + fcp.o cmp.o amdtp-stream.o amdtp-am824.o +snd-isight-y := isight.o + +obj-$(CONFIG_SND_FIREWIRE_LIB) += snd-firewire-lib.o +obj-$(CONFIG_SND_DICE) += dice/ +obj-$(CONFIG_SND_OXFW) += oxfw/ +obj-$(CONFIG_SND_ISIGHT) += snd-isight.o +obj-$(CONFIG_SND_FIREWORKS) += fireworks/ +obj-$(CONFIG_SND_BEBOB) += bebob/ +obj-$(CONFIG_SND_FIREWIRE_DIGI00X) += digi00x/ +obj-$(CONFIG_SND_FIREWIRE_TASCAM) += tascam/ +obj-$(CONFIG_SND_FIREWIRE_MOTU) += motu/ +obj-$(CONFIG_SND_FIREFACE) += fireface/ -- cgit v1.3.1