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/media/cec/Kconfig | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 drivers/media/cec/Kconfig (limited to 'drivers/media/cec/Kconfig') diff --git a/drivers/media/cec/Kconfig b/drivers/media/cec/Kconfig new file mode 100644 index 000000000..94ef3349b --- /dev/null +++ b/drivers/media/cec/Kconfig @@ -0,0 +1,43 @@ +# SPDX-License-Identifier: GPL-2.0-only +config CEC_CORE + tristate + +config CEC_NOTIFIER + bool + +config CEC_PIN + bool + +menu "CEC support" + +config MEDIA_CEC_RC + bool "HDMI CEC RC integration" + depends on CEC_CORE && RC_CORE + depends on CEC_CORE=m || RC_CORE=y + help + Pass on CEC remote control messages to the RC framework. + +config CEC_PIN_ERROR_INJ + bool "Enable CEC error injection support" + depends on CEC_PIN && DEBUG_FS + help + This option enables CEC error injection using debugfs. + +menuconfig MEDIA_CEC_SUPPORT + bool + prompt "HDMI CEC drivers" + default y if MEDIA_SUPPORT && !MEDIA_SUPPORT_FILTER + help + Enable support for HDMI CEC (Consumer Electronics Control), + which is an optional HDMI feature. + + Say Y when you have an HDMI receiver, transmitter or a USB CEC + adapter that supports HDMI CEC. + +if MEDIA_CEC_SUPPORT +source "drivers/media/cec/i2c/Kconfig" +source "drivers/media/cec/platform/Kconfig" +source "drivers/media/cec/usb/Kconfig" +endif + +endmenu -- cgit v1.3.1