Revision 9dba988edb31d013003b7f00e82dd56f01db70c3 authored by Aaron Lewis on 31 May 2019, 14:14:52 UTC, committed by Paolo Bonzini on 19 June 2019, 14:11:54 UTC
When running with /sys/module/kvm_intel/parameters/unrestricted_guest=N, test that a kernel warning does not occur informing us that vcpu->mmio_needed=1. This can happen when KVM_RUN is called after a triple fault. This test was made to detect a bug that was reported by Syzkaller (https://groups.google.com/forum/#!topic/syzkaller/lHfau8E3SOE) and fixed with commit bbeac2830f4de ("KVM: X86: Fix residual mmio emulation request to userspace"). Signed-off-by: Aaron Lewis <aaronlewis@google.com> Reviewed-by: Jim Mattson <jmattson@google.com> Reviewed-by: Peter Shier <pshier@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 parent 61cfcd5
test_static_key_base.c
/*
* Kernel module for testing static keys.
*
* Copyright 2015 Akamai Technologies Inc. All Rights Reserved
*
* Authors:
* Jason Baron <jbaron@akamai.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/jump_label.h>
/* old keys */
struct static_key base_old_true_key = STATIC_KEY_INIT_TRUE;
EXPORT_SYMBOL_GPL(base_old_true_key);
struct static_key base_inv_old_true_key = STATIC_KEY_INIT_TRUE;
EXPORT_SYMBOL_GPL(base_inv_old_true_key);
struct static_key base_old_false_key = STATIC_KEY_INIT_FALSE;
EXPORT_SYMBOL_GPL(base_old_false_key);
struct static_key base_inv_old_false_key = STATIC_KEY_INIT_FALSE;
EXPORT_SYMBOL_GPL(base_inv_old_false_key);
/* new keys */
DEFINE_STATIC_KEY_TRUE(base_true_key);
EXPORT_SYMBOL_GPL(base_true_key);
DEFINE_STATIC_KEY_TRUE(base_inv_true_key);
EXPORT_SYMBOL_GPL(base_inv_true_key);
DEFINE_STATIC_KEY_FALSE(base_false_key);
EXPORT_SYMBOL_GPL(base_false_key);
DEFINE_STATIC_KEY_FALSE(base_inv_false_key);
EXPORT_SYMBOL_GPL(base_inv_false_key);
static void invert_key(struct static_key *key)
{
if (static_key_enabled(key))
static_key_disable(key);
else
static_key_enable(key);
}
static int __init test_static_key_base_init(void)
{
invert_key(&base_inv_old_true_key);
invert_key(&base_inv_old_false_key);
invert_key(&base_inv_true_key.key);
invert_key(&base_inv_false_key.key);
return 0;
}
static void __exit test_static_key_base_exit(void)
{
}
module_init(test_static_key_base_init);
module_exit(test_static_key_base_exit);
MODULE_AUTHOR("Jason Baron <jbaron@akamai.com>");
MODULE_LICENSE("GPL");
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