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/ipa/Makefile | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 drivers/net/ipa/Makefile (limited to 'drivers/net/ipa/Makefile') diff --git a/drivers/net/ipa/Makefile b/drivers/net/ipa/Makefile new file mode 100644 index 000000000..e148ec3c1 --- /dev/null +++ b/drivers/net/ipa/Makefile @@ -0,0 +1,25 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Qualcomm IPA driver. + +IPA_REG_VERSIONS := 3.1 3.5.1 4.2 4.5 4.7 4.9 4.11 5.0 5.5 + +# Some IPA versions can reuse another set of GSI register definitions. +GSI_REG_VERSIONS := 3.1 3.5.1 4.0 4.5 4.9 4.11 5.0 + +IPA_DATA_VERSIONS := 3.1 3.5.1 4.2 4.5 4.7 4.9 4.11 5.0 5.2 5.5 + +obj-$(CONFIG_QCOM_IPA) += ipa.o + +ipa-y := ipa_main.o ipa_power.o ipa_reg.o ipa_mem.o \ + ipa_table.o ipa_interrupt.o gsi.o gsi_reg.o \ + gsi_trans.o ipa_gsi.o ipa_smp2p.o ipa_uc.o \ + ipa_endpoint.o ipa_cmd.o ipa_modem.o \ + ipa_resource.o ipa_qmi.o ipa_qmi_msg.o \ + ipa_sysfs.o + +ipa-y += $(IPA_REG_VERSIONS:%=reg/ipa_reg-v%.o) + +ipa-y += $(GSI_REG_VERSIONS:%=reg/gsi_reg-v%.o) + +ipa-y += $(IPA_DATA_VERSIONS:%=data/ipa_data-v%.o) -- cgit v1.3.1