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/scsi/libsas/Kconfig | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 drivers/scsi/libsas/Kconfig (limited to 'drivers/scsi/libsas/Kconfig') diff --git a/drivers/scsi/libsas/Kconfig b/drivers/scsi/libsas/Kconfig new file mode 100644 index 000000000..c640535d1 --- /dev/null +++ b/drivers/scsi/libsas/Kconfig @@ -0,0 +1,33 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Kernel configuration file for the SAS Class +# +# Copyright (C) 2005 Adaptec, Inc. All rights reserved. +# Copyright (C) 2005 Luben Tuikov +# + +config SCSI_SAS_LIBSAS + tristate "SAS Domain Transport Attributes" + depends on SCSI + select SCSI_SAS_ATTRS + help + This provides transport specific helpers for SAS drivers which + use the domain device construct (like the aic94xxx). + +config SCSI_SAS_ATA + bool "ATA support for libsas (requires libata)" + depends on SCSI_SAS_LIBSAS + depends on ATA = y || ATA = SCSI_SAS_LIBSAS + select SATA_HOST + help + Builds in ATA support into libsas. Will necessitate + the loading of libata along with libsas. + +config SCSI_SAS_HOST_SMP + bool "Support for SMP interpretation for SAS hosts" + default y + depends on SCSI_SAS_LIBSAS + help + Allows sas hosts to receive SMP frames. Selecting this + option builds an SMP interpreter into libsas. Say + N here if you want to save the few kb this consumes. -- cgit v1.3.1