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/target/sbp/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 drivers/target/sbp/Kconfig (limited to 'drivers/target/sbp/Kconfig') diff --git a/drivers/target/sbp/Kconfig b/drivers/target/sbp/Kconfig new file mode 100644 index 000000000..53a1c75f5 --- /dev/null +++ b/drivers/target/sbp/Kconfig @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0-only +config SBP_TARGET + tristate "FireWire SBP-2 fabric module" + depends on FIREWIRE + help + Say Y or M here to enable SCSI target functionality over FireWire. + This enables you to expose SCSI devices to other nodes on the FireWire + bus, for example hard disks. Similar to FireWire Target Disk mode on + many Apple computers. + + To compile this driver as a module, say M here: The module will be + called sbp-target. -- cgit v1.3.1