From 6668ed271eaefaa63e686bdfbedaeb7b8e492722 Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi Date: Fri, 4 Sep 2026 10:43:19 +0200 Subject: selftests/bpf: Reject graph kptr use after RCU unlock Add a sleepable verifier test that loads a graph-node local kptr in an explicit RCU read-side critical section, then passes its node to bpf_rbtree_remove() after the section ends. Before the verifier fix, the stale NON_OWN_REF flag makes the node look like a live borrowed reference and the program is accepted. After the fix, the pointer is demoted without NON_OWN_REF and the graph kfunc argument is rejected. Also exercise a graph kptr loaded while a spin lock provides implicit RCU protection. The pointer must be invalidated when the lock is released, which guards the required ordering between non-owning-reference invalidation and RCU demotion. Update the existing fault-protected load test state description. The post-unlock pointer no longer carries NON_OWN_REF, but remains readable because the load is rewritten to use BPF_PROBE_MEM. Signed-off-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/hid/i2c-hid/Kconfig | 80 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 drivers/hid/i2c-hid/Kconfig (limited to 'drivers/hid/i2c-hid/Kconfig') diff --git a/drivers/hid/i2c-hid/Kconfig b/drivers/hid/i2c-hid/Kconfig new file mode 100644 index 000000000..e8d51f410 --- /dev/null +++ b/drivers/hid/i2c-hid/Kconfig @@ -0,0 +1,80 @@ +# SPDX-License-Identifier: GPL-2.0-only +menuconfig I2C_HID + tristate "I2C HID support" + default y + depends on I2C + +if I2C_HID + +config I2C_HID_ACPI + tristate "HID over I2C transport layer ACPI driver" + depends on ACPI + depends on DRM || !DRM + select I2C_HID_CORE + help + Say Y here if you use a keyboard, a touchpad, a touchscreen, or any + other HID based devices which is connected to your computer via I2C. + This driver supports ACPI-based systems. + + If unsure, say N. + + This support is also available as a module. If so, the module + will be called i2c-hid-acpi. It will also build/depend on the + module i2c-hid. + +config I2C_HID_OF + tristate "HID over I2C transport layer Open Firmware driver" + # No "depends on OF" because this can also be used for manually + # (board-file) instantiated "hid-over-i2c" type i2c-clients. + depends on DRM || !DRM + select I2C_HID_CORE + help + Say Y here if you use a keyboard, a touchpad, a touchscreen, or any + other HID based devices which is connected to your computer via I2C. + This driver supports Open Firmware (Device Tree)-based systems as + well as binding to manually (board-file) instantiated i2c-hid-clients. + + If unsure, say N. + + This support is also available as a module. If so, the module + will be called i2c-hid-of. It will also build/depend on the + module i2c-hid. + +config I2C_HID_OF_ELAN + tristate "Driver for Elan hid-i2c based devices on OF systems" + depends on OF + depends on DRM || !DRM + select I2C_HID_CORE + help + Say Y here if you want support for Elan i2c devices that use + the i2c-hid protocol on Open Firmware (Device Tree)-based + systems. + + If unsure, say N. + + This support is also available as a module. If so, the module + will be called i2c-hid-of-elan. It will also build/depend on + the module i2c-hid. + +config I2C_HID_OF_GOODIX + tristate "Driver for Goodix hid-i2c based devices on OF systems" + depends on OF + depends on DRM || !DRM + select I2C_HID_CORE + help + Say Y here if you want support for Goodix i2c devices that use + the i2c-hid protocol on Open Firmware (Device Tree)-based + systems. + + If unsure, say N. + + This support is also available as a module. If so, the module + will be called i2c-hid-of-goodix. It will also build/depend on + the module i2c-hid. + +config I2C_HID_CORE + tristate + # We need to call into panel code so if DRM=m, this can't be 'y' + depends on DRM || !DRM +endif + -- cgit v1.3.1