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/nfc/pn533/Kconfig | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 drivers/nfc/pn533/Kconfig (limited to 'drivers/nfc/pn533/Kconfig') diff --git a/drivers/nfc/pn533/Kconfig b/drivers/nfc/pn533/Kconfig new file mode 100644 index 000000000..31822b432 --- /dev/null +++ b/drivers/nfc/pn533/Kconfig @@ -0,0 +1,39 @@ +# SPDX-License-Identifier: GPL-2.0-only +config NFC_PN533 + tristate + help + NXP PN533 core driver. + This driver provides core functionality for NXP PN533 NFC devices. + +config NFC_PN533_USB + tristate "NFC PN533 device support (USB)" + depends on USB + select NFC_PN533 + help + This module adds support for the NXP pn533 USB interface. + Select this if your platform is using the USB bus. + + If you choose to build a module, it'll be called pn533_usb. + Say N if unsure. + +config NFC_PN533_I2C + tristate "NFC PN533 device support (I2C)" + depends on I2C + select NFC_PN533 + help + This module adds support for the NXP pn533 I2C interface. + Select this if your platform is using the I2C bus. + + If you choose to build a module, it'll be called pn533_i2c. + Say N if unsure. + +config NFC_PN532_UART + tristate "NFC PN532 device support (UART)" + depends on SERIAL_DEV_BUS + select NFC_PN533 + help + This module adds support for the NXP pn532 UART interface. + Select this if your platform is using the UART bus. + + If you choose to build a module, it'll be called pn532_uart. + Say N if unsure. -- cgit v1.3.1