openrisc: fix arbitrary kernel memory access via or1k_atomic syscallgrafted

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 <ali@iusegentoo.com>
Signed-off-by: Stafford Horne <shorne@gmail.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile
new file mode 100644
index 000000000..bafc26250
--- /dev/null
+++ b/drivers/bluetooth/Makefile
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux Bluetooth HCI device drivers.
+#
+
+obj-$(CONFIG_BT_HCIVHCI)	+= hci_vhci.o
+obj-$(CONFIG_BT_HCIUART)	+= hci_uart.o
+obj-$(CONFIG_BT_HCIBCM203X)	+= bcm203x.o
+obj-$(CONFIG_BT_HCIBCM4377)	+= hci_bcm4377.o
+obj-$(CONFIG_BT_HCIBPA10X)	+= bpa10x.o
+obj-$(CONFIG_BT_HCIBFUSB)	+= bfusb.o
+
+obj-$(CONFIG_BT_HCIBTUSB)	+= btusb.o
+obj-$(CONFIG_BT_HCIBTSDIO)	+= btsdio.o
+
+obj-$(CONFIG_BT_INTEL)		+= btintel.o
+obj-$(CONFIG_BT_INTEL_PCIE)	+= btintel_pcie.o btintel.o
+obj-$(CONFIG_BT_ATH3K)		+= ath3k.o
+obj-$(CONFIG_BT_MRVL)		+= btmrvl.o
+obj-$(CONFIG_BT_MRVL_SDIO)	+= btmrvl_sdio.o
+obj-$(CONFIG_BT_MTKSDIO)	+= btmtksdio.o
+obj-$(CONFIG_BT_MTKUART)	+= btmtkuart.o
+obj-$(CONFIG_BT_QCOMSMD)	+= btqcomsmd.o
+obj-$(CONFIG_BT_BCM)		+= btbcm.o
+obj-$(CONFIG_BT_RTL)		+= btrtl.o
+obj-$(CONFIG_BT_QCA)		+= btqca.o
+obj-$(CONFIG_BT_MTK)		+= btmtk.o
+
+obj-$(CONFIG_BT_VIRTIO)		+= virtio_bt.o
+obj-$(CONFIG_BT_NXPUART)	+= btnxpuart.o
+
+obj-$(CONFIG_BT_HCIUART_NOKIA)	+= hci_nokia.o
+
+obj-$(CONFIG_BT_HCIRSI)		+= btrsi.o
+
+btmrvl-y			:= btmrvl_main.o
+btmrvl-$(CONFIG_DEBUG_FS)	+= btmrvl_debugfs.o
+
+hci_uart-y				:= hci_ldisc.o
+hci_uart-$(CONFIG_BT_HCIUART_SERDEV)	+= hci_serdev.o
+hci_uart-$(CONFIG_BT_HCIUART_H4)	+= hci_h4.o
+hci_uart-$(CONFIG_BT_HCIUART_BCSP)	+= hci_bcsp.o
+hci_uart-$(CONFIG_BT_HCIUART_LL)	+= hci_ll.o
+hci_uart-$(CONFIG_BT_HCIUART_ATH3K)	+= hci_ath.o
+hci_uart-$(CONFIG_BT_HCIUART_3WIRE)	+= hci_h5.o
+hci_uart-$(CONFIG_BT_HCIUART_INTEL)	+= hci_intel.o
+hci_uart-$(CONFIG_BT_HCIUART_BCM)	+= hci_bcm.o
+hci_uart-$(CONFIG_BT_HCIUART_QCA)	+= hci_qca.o
+hci_uart-$(CONFIG_BT_HCIUART_AG6XX)	+= hci_ag6xx.o
+hci_uart-$(CONFIG_BT_HCIUART_MRVL)	+= hci_mrvl.o
+hci_uart-$(CONFIG_BT_HCIUART_AML)	+= hci_aml.o
+hci_uart-objs				:= $(hci_uart-y)