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/Kconfig | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 drivers/net/ipa/Kconfig (limited to 'drivers/net/ipa/Kconfig') diff --git a/drivers/net/ipa/Kconfig b/drivers/net/ipa/Kconfig new file mode 100644 index 000000000..01d219d37 --- /dev/null +++ b/drivers/net/ipa/Kconfig @@ -0,0 +1,23 @@ +config QCOM_IPA + tristate "Qualcomm IPA support" + depends on NET && QCOM_SMEM + depends on ARCH_QCOM || COMPILE_TEST + depends on INTERCONNECT + depends on QCOM_RPROC_COMMON || (QCOM_RPROC_COMMON=n && COMPILE_TEST) + depends on QCOM_AOSS_QMP || QCOM_AOSS_QMP=n + select QCOM_MDT_LOADER + select QCOM_SCM + select QCOM_QMI_HELPERS + help + Choose Y or M here to include support for the Qualcomm + IP Accelerator (IPA), a hardware block present in some + Qualcomm SoCs. The IPA is a programmable protocol processor + that is capable of generic hardware handling of IP packets, + including routing, filtering, and NAT. Currently the IPA + driver supports only basic transport of network traffic + between the AP and modem. + + Note that if selected, the selection type must match that + of QCOM_Q6V5_COMMON (Y or M). + + If unsure, say N. -- cgit v1.3.1