forked from mirrors/linux
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 <elver@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: Dietmar Eggemann <dietmar.eggemann@arm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ben Segall <bsegall@google.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Daniel Bristot de Oliveira <bristot@redhat.com> Cc: Valentin Schneider <vschneid@redhat.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Gow <davidgow@google.com> Cc: tangmeng <tangmeng@uniontech.com> Cc: Jann Horn <jannh@google.com> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: Petr Mladek <pmladek@suse.com> Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: "Guilherme G. Piccoli" <gpiccoli@igalia.com> Cc: Tiezhu Yang <yangtiezhu@loongson.cn> Cc: kasan-dev@googlegroups.com Cc: linux-mm@kvack.org Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Marco Elver <elver@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Link: https://lore.kernel.org/r/20221117234328.594699-4-keescook@chromium.org
94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_PANIC_H
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#define _LINUX_PANIC_H
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#include <linux/compiler_attributes.h>
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#include <linux/types.h>
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struct pt_regs;
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extern long (*panic_blink)(int state);
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__printf(1, 2)
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void panic(const char *fmt, ...) __noreturn __cold;
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void nmi_panic(struct pt_regs *regs, const char *msg);
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void check_panic_on_warn(const char *origin);
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extern void oops_enter(void);
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extern void oops_exit(void);
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extern bool oops_may_print(void);
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extern int panic_timeout;
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extern unsigned long panic_print;
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extern int panic_on_oops;
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extern int panic_on_unrecovered_nmi;
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extern int panic_on_io_nmi;
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extern int panic_on_warn;
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extern unsigned long panic_on_taint;
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extern bool panic_on_taint_nousertaint;
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extern int sysctl_panic_on_rcu_stall;
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extern int sysctl_max_rcu_stall_to_panic;
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extern int sysctl_panic_on_stackoverflow;
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extern bool crash_kexec_post_notifiers;
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/*
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* panic_cpu is used for synchronizing panic() and crash_kexec() execution. It
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* holds a CPU number which is executing panic() currently. A value of
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* PANIC_CPU_INVALID means no CPU has entered panic() or crash_kexec().
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*/
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extern atomic_t panic_cpu;
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#define PANIC_CPU_INVALID -1
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/*
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* Only to be used by arch init code. If the user over-wrote the default
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* CONFIG_PANIC_TIMEOUT, honor it.
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*/
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static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout)
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{
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if (panic_timeout == arch_default_timeout)
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panic_timeout = timeout;
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}
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/* This cannot be an enum because some may be used in assembly source. */
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#define TAINT_PROPRIETARY_MODULE 0
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#define TAINT_FORCED_MODULE 1
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#define TAINT_CPU_OUT_OF_SPEC 2
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#define TAINT_FORCED_RMMOD 3
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#define TAINT_MACHINE_CHECK 4
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#define TAINT_BAD_PAGE 5
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#define TAINT_USER 6
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#define TAINT_DIE 7
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#define TAINT_OVERRIDDEN_ACPI_TABLE 8
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#define TAINT_WARN 9
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#define TAINT_CRAP 10
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#define TAINT_FIRMWARE_WORKAROUND 11
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#define TAINT_OOT_MODULE 12
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#define TAINT_UNSIGNED_MODULE 13
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#define TAINT_SOFTLOCKUP 14
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#define TAINT_LIVEPATCH 15
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#define TAINT_AUX 16
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#define TAINT_RANDSTRUCT 17
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#define TAINT_TEST 18
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#define TAINT_FLAGS_COUNT 19
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#define TAINT_FLAGS_MAX ((1UL << TAINT_FLAGS_COUNT) - 1)
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struct taint_flag {
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char c_true; /* character printed when tainted */
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char c_false; /* character printed when not tainted */
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bool module; /* also show as a per-module taint flag */
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};
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extern const struct taint_flag taint_flags[TAINT_FLAGS_COUNT];
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enum lockdep_ok {
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LOCKDEP_STILL_OK,
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LOCKDEP_NOW_UNRELIABLE,
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};
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extern const char *print_tainted(void);
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extern void add_taint(unsigned flag, enum lockdep_ok);
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extern int test_taint(unsigned flag);
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extern unsigned long get_taint(void);
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#endif /* _LINUX_PANIC_H */
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