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/mvme147.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 drivers/scsi/mvme147.h (limited to 'drivers/scsi/mvme147.h') diff --git a/drivers/scsi/mvme147.h b/drivers/scsi/mvme147.h new file mode 100644 index 000000000..f75ff58dd --- /dev/null +++ b/drivers/scsi/mvme147.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef MVME147_H + +/* $Id: mvme147.h,v 1.4 1997/01/19 23:07:10 davem Exp $ + * + * Header file for the MVME147 built-in SCSI controller for Linux + * + * Written and (C) 1993, Hamish Macdonald, see mvme147.c for more info + * + */ + +#include + +int mvme147_detect(struct scsi_host_template *); +int mvme147_release(struct Scsi_Host *); + +#ifndef CMD_PER_LUN +#define CMD_PER_LUN 2 +#endif + +#ifndef CAN_QUEUE +#define CAN_QUEUE 16 +#endif + +#endif /* MVME147_H */ -- cgit v1.3.1