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/net/dsa/Makefile | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 drivers/net/dsa/Makefile (limited to 'drivers/net/dsa/Makefile') diff --git a/drivers/net/dsa/Makefile b/drivers/net/dsa/Makefile new file mode 100644 index 000000000..d2975badf --- /dev/null +++ b/drivers/net/dsa/Makefile @@ -0,0 +1,29 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_NET_DSA_BCM_SF2) += bcm-sf2.o +bcm-sf2-objs := bcm_sf2.o bcm_sf2_cfp.o +obj-$(CONFIG_NET_DSA_LOOP) += dsa_loop.o +obj-$(CONFIG_NET_DSA_KS8995) += ks8995.o +obj-$(CONFIG_NET_DSA_MT7530) += mt7530.o +obj-$(CONFIG_NET_DSA_MT7530_MDIO) += mt7530-mdio.o +obj-$(CONFIG_NET_DSA_MT7530_MMIO) += mt7530-mmio.o +obj-$(CONFIG_NET_DSA_MV88E6060) += mv88e6060.o +obj-$(CONFIG_NET_DSA_RZN1_A5PSW) += rzn1_a5psw.o +obj-$(CONFIG_NET_DSA_SMSC_LAN9303) += lan9303-core.o +obj-$(CONFIG_NET_DSA_SMSC_LAN9303_I2C) += lan9303_i2c.o +obj-$(CONFIG_NET_DSA_SMSC_LAN9303_MDIO) += lan9303_mdio.o +obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX) += vitesse-vsc73xx-core.o +obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX_PLATFORM) += vitesse-vsc73xx-platform.o +obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX_SPI) += vitesse-vsc73xx-spi.o +obj-$(CONFIG_NET_DSA_YT921X) += yt921x.o +obj-y += b53/ +obj-y += hirschmann/ +obj-y += lantiq/ +obj-y += microchip/ +obj-y += mv88e6xxx/ +obj-y += mxl862xx/ +obj-y += netc/ +obj-y += ocelot/ +obj-y += qca/ +obj-y += realtek/ +obj-y += sja1105/ +obj-y += xrs700x/ -- cgit v1.3.1