From 836b2fe544a5e9b5ce116622cb36fba33838c6fd Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 01:33:23 -0700 Subject: selftests/bpf: Check that JMP32 pointer vs zero jumps are not predicted Add jmp32_ptr_vs_zero_jne: the fall-through of the 32-bit compare, which the verifier used to skip, contains an out of bounds map value access, hence w/o the previous patch the program is accepted. See previous patch for detailed description. Reported-by: Nicholas Carlini Suggested-by: Nicholas Carlini Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/bpf/20260904083325.2083493-6-eddyz87@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- drivers/base/hypervisor.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 drivers/base/hypervisor.c (limited to 'drivers/base/hypervisor.c') diff --git a/drivers/base/hypervisor.c b/drivers/base/hypervisor.c new file mode 100644 index 000000000..1ce59b4b5 --- /dev/null +++ b/drivers/base/hypervisor.c @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * hypervisor.c - /sys/hypervisor subsystem. + * + * Copyright (C) IBM Corp. 2006 + * Copyright (C) 2007 Greg Kroah-Hartman + * Copyright (C) 2007 Novell Inc. + */ + +#include +#include +#include +#include "base.h" + +struct kobject *hypervisor_kobj; +EXPORT_SYMBOL_GPL(hypervisor_kobj); + +int __init hypervisor_init(void) +{ + hypervisor_kobj = kobject_create_and_add("hypervisor", NULL); + if (!hypervisor_kobj) + return -ENOMEM; + return 0; +} -- cgit v1.3.1