mirror of
https://github.com/torvalds/linux.git
synced 2026-09-25 21:21:09 -04:00
Kees Cook
79cc1ba7ba
Several run-time checkers (KASAN, UBSAN, KFENCE, KCSAN, sched) roll their own warnings, and each check "panic_on_warn". Consolidate this into a single function so that future instrumentation can be added in a single location. Cc: Marco Elver <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Juri Lelli <[email protected]> Cc: Vincent Guittot <[email protected]> Cc: Dietmar Eggemann <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Ben Segall <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Daniel Bristot de Oliveira <[email protected]> Cc: Valentin Schneider <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Andrey Konovalov <[email protected]> Cc: Vincenzo Frascino <[email protected]> Cc: Andrew Morton <[email protected]> Cc: David Gow <[email protected]> Cc: tangmeng <[email protected]> Cc: Jann Horn <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Petr Mladek <[email protected]> Cc: "Paul E. McKenney" <[email protected]> Cc: Sebastian Andrzej Siewior <[email protected]> Cc: "Guilherme G. Piccoli" <[email protected]> Cc: Tiezhu Yang <[email protected]> Cc: [email protected] Cc: [email protected] Reviewed-by: Luis Chamberlain <[email protected]> Signed-off-by: Kees Cook <[email protected]> Reviewed-by: Marco Elver <[email protected]> Reviewed-by: Andrey Konovalov <[email protected]> Link: https://lore.kernel.org/r/[email protected]
95 lines
2.6 KiB
C
95 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);
|
|
void check_panic_on_warn(const char *origin);
|
|
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 */
|