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/arm/Kconfig | 74 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 drivers/scsi/arm/Kconfig (limited to 'drivers/scsi/arm/Kconfig') diff --git a/drivers/scsi/arm/Kconfig b/drivers/scsi/arm/Kconfig new file mode 100644 index 000000000..9f64133f9 --- /dev/null +++ b/drivers/scsi/arm/Kconfig @@ -0,0 +1,74 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# SCSI driver configuration for Acorn +# +config SCSI_ACORNSCSI_3 + tristate "Acorn SCSI card (aka30) support" + depends on ARCH_ACORN && SCSI + select SCSI_SPI_ATTRS + help + This enables support for the Acorn SCSI card (aka30). If you have an + Acorn system with one of these, say Y. If unsure, say N. + +config SCSI_ACORNSCSI_SYNC + bool "Support SCSI 2 Synchronous Transfers" + depends on SCSI_ACORNSCSI_3 + help + Say Y here to enable synchronous transfer negotiation with all + targets on the Acorn SCSI card. + + In general, this improves performance; however some SCSI devices + don't implement it properly, so the safe answer is N. + +config SCSI_ARXESCSI + tristate "ARXE SCSI support" + depends on ARCH_ACORN && SCSI + help + Around 1991, Arxe Systems Limited released a high density floppy + disc interface for the Acorn Archimedes range, to allow the use of + HD discs from the then new A5000 on earlier models. This interface + was either sold on its own or with an integral SCSI controller. + Technical details on this NCR53c94-based device are available at + + Say Y here to compile in support for the SCSI controller. + +config SCSI_CUMANA_2 + tristate "CumanaSCSI II support" + depends on ARCH_ACORN && SCSI + help + This enables support for the Cumana SCSI II card. If you have an + Acorn system with one of these, say Y. If unsure, say N. + +config SCSI_EESOXSCSI + tristate "EESOX support" + depends on ARCH_ACORN && SCSI + help + This enables support for the EESOX SCSI card. If you have an Acorn + system with one of these, say Y, otherwise say N. + +config SCSI_POWERTECSCSI + tristate "PowerTec support" + depends on ARCH_ACORN && SCSI + help + This enables support for the Powertec SCSI card on Acorn systems. If + you have one of these, say Y. If unsure, say N. + +comment "The following drivers are not fully supported" + depends on ARCH_ACORN + +config SCSI_CUMANA_1 + tristate "CumanaSCSI I support" + depends on ARCH_ACORN && SCSI + select SCSI_SPI_ATTRS + help + This enables support for the Cumana SCSI I card. If you have an + Acorn system with one of these, say Y. If unsure, say N. + +config SCSI_OAK1 + tristate "Oak SCSI support" + depends on ARCH_ACORN && SCSI + select SCSI_SPI_ATTRS + help + This enables support for the Oak SCSI card. If you have an Acorn + system with one of these, say Y. If unsure, say N. + -- cgit v1.3.1