mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-18 08:35:03 +00:00
2852ca7fba
Most in-kernel tests (such as KUnit tests) are not supposed to run on production systems: they may do deliberately illegal things to trigger errors, and have security implications (for example, KUnit assertions will often deliberately leak kernel addresses). Add a new taint type, TAINT_TEST to signal that a test has been run. This will be printed as 'N' (originally for kuNit, as every other sensible letter was taken.) This should discourage people from running these tests on production systems, and to make it easier to tell if tests have been run accidentally (by loading the wrong configuration, etc.) Acked-by: Luis Chamberlain <mcgrof@kernel.org> Reviewed-by: Brendan Higgins <brendanhiggins@google.com> Signed-off-by: David Gow <davidgow@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_PANIC_H
|
|
#define _LINUX_PANIC_H
|
|
|
|
#include <linux/compiler_attributes.h>
|
|
#include <linux/types.h>
|
|
|
|
struct pt_regs;
|
|
|
|
extern long (*panic_blink)(int state);
|
|
__printf(1, 2)
|
|
void panic(const char *fmt, ...) __noreturn __cold;
|
|
void nmi_panic(struct pt_regs *regs, const char *msg);
|
|
extern void oops_enter(void);
|
|
extern void oops_exit(void);
|
|
extern bool oops_may_print(void);
|
|
|
|
extern int panic_timeout;
|
|
extern unsigned long panic_print;
|
|
extern int panic_on_oops;
|
|
extern int panic_on_unrecovered_nmi;
|
|
extern int panic_on_io_nmi;
|
|
extern int panic_on_warn;
|
|
|
|
extern unsigned long panic_on_taint;
|
|
extern bool panic_on_taint_nousertaint;
|
|
|
|
extern int sysctl_panic_on_rcu_stall;
|
|
extern int sysctl_max_rcu_stall_to_panic;
|
|
extern int sysctl_panic_on_stackoverflow;
|
|
|
|
extern bool crash_kexec_post_notifiers;
|
|
|
|
/*
|
|
* panic_cpu is used for synchronizing panic() and crash_kexec() execution. It
|
|
* holds a CPU number which is executing panic() currently. A value of
|
|
* PANIC_CPU_INVALID means no CPU has entered panic() or crash_kexec().
|
|
*/
|
|
extern atomic_t panic_cpu;
|
|
#define PANIC_CPU_INVALID -1
|
|
|
|
/*
|
|
* Only to be used by arch init code. If the user over-wrote the default
|
|
* CONFIG_PANIC_TIMEOUT, honor it.
|
|
*/
|
|
static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout)
|
|
{
|
|
if (panic_timeout == arch_default_timeout)
|
|
panic_timeout = timeout;
|
|
}
|
|
|
|
/* This cannot be an enum because some may be used in assembly source. */
|
|
#define TAINT_PROPRIETARY_MODULE 0
|
|
#define TAINT_FORCED_MODULE 1
|
|
#define TAINT_CPU_OUT_OF_SPEC 2
|
|
#define TAINT_FORCED_RMMOD 3
|
|
#define TAINT_MACHINE_CHECK 4
|
|
#define TAINT_BAD_PAGE 5
|
|
#define TAINT_USER 6
|
|
#define TAINT_DIE 7
|
|
#define TAINT_OVERRIDDEN_ACPI_TABLE 8
|
|
#define TAINT_WARN 9
|
|
#define TAINT_CRAP 10
|
|
#define TAINT_FIRMWARE_WORKAROUND 11
|
|
#define TAINT_OOT_MODULE 12
|
|
#define TAINT_UNSIGNED_MODULE 13
|
|
#define TAINT_SOFTLOCKUP 14
|
|
#define TAINT_LIVEPATCH 15
|
|
#define TAINT_AUX 16
|
|
#define TAINT_RANDSTRUCT 17
|
|
#define TAINT_TEST 18
|
|
#define TAINT_FLAGS_COUNT 19
|
|
#define TAINT_FLAGS_MAX ((1UL << TAINT_FLAGS_COUNT) - 1)
|
|
|
|
struct taint_flag {
|
|
char c_true; /* character printed when tainted */
|
|
char c_false; /* character printed when not tainted */
|
|
bool module; /* also show as a per-module taint flag */
|
|
};
|
|
|
|
extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT];
|
|
|
|
enum lockdep_ok {
|
|
LOCKDEP_STILL_OK,
|
|
LOCKDEP_NOW_UNRELIABLE,
|
|
};
|
|
|
|
extern const char *print_tainted(void);
|
|
extern void add_taint(unsigned flag, enum lockdep_ok);
|
|
extern int test_taint(unsigned flag);
|
|
extern unsigned long get_taint(void);
|
|
|
|
#endif /* _LINUX_PANIC_H */
|