Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/kernel/panic.c | |
3 | * | |
4 | * Copyright (C) 1991, 1992 Linus Torvalds | |
5 | */ | |
6 | ||
7 | /* | |
8 | * This function is used through-out the kernel (including mm and fs) | |
9 | * to indicate a major problem. | |
10 | */ | |
c95dbf27 IM |
11 | #include <linux/debug_locks.h> |
12 | #include <linux/interrupt.h> | |
456b565c | 13 | #include <linux/kmsg_dump.h> |
c95dbf27 IM |
14 | #include <linux/kallsyms.h> |
15 | #include <linux/notifier.h> | |
1da177e4 | 16 | #include <linux/module.h> |
c95dbf27 | 17 | #include <linux/random.h> |
de7edd31 | 18 | #include <linux/ftrace.h> |
1da177e4 | 19 | #include <linux/reboot.h> |
c95dbf27 IM |
20 | #include <linux/delay.h> |
21 | #include <linux/kexec.h> | |
22 | #include <linux/sched.h> | |
1da177e4 | 23 | #include <linux/sysrq.h> |
c95dbf27 | 24 | #include <linux/init.h> |
1da177e4 | 25 | #include <linux/nmi.h> |
08d78658 | 26 | #include <linux/console.h> |
1cac41cb MB |
27 | #include <linux/exynos-ss.h> |
28 | #include <soc/samsung/exynos-condbg.h> | |
29 | #include <asm/core_regs.h> | |
30 | #include "sched/sched.h" | |
31 | ||
32 | #include <asm/core_regs.h> | |
1da177e4 | 33 | |
c7ff0d9c TS |
34 | #define PANIC_TIMER_STEP 100 |
35 | #define PANIC_BLINK_SPD 18 | |
36 | ||
1cac41cb MB |
37 | /* Machine specific panic information string */ |
38 | char *mach_panic_string; | |
39 | ||
2a01bb38 | 40 | int panic_on_oops = CONFIG_PANIC_ON_OOPS_VALUE; |
25ddbb18 | 41 | static unsigned long tainted_mask; |
dd287796 AM |
42 | static int pause_on_oops; |
43 | static int pause_on_oops_flag; | |
44 | static DEFINE_SPINLOCK(pause_on_oops_lock); | |
5375b708 | 45 | bool crash_kexec_post_notifiers; |
9e3961a0 | 46 | int panic_on_warn __read_mostly; |
1da177e4 | 47 | |
5800dc3c | 48 | int panic_timeout = CONFIG_PANIC_TIMEOUT; |
81e88fdc | 49 | EXPORT_SYMBOL_GPL(panic_timeout); |
1da177e4 | 50 | |
e041c683 | 51 | ATOMIC_NOTIFIER_HEAD(panic_notifier_list); |
1da177e4 LT |
52 | |
53 | EXPORT_SYMBOL(panic_notifier_list); | |
54 | ||
c7ff0d9c | 55 | static long no_blink(int state) |
8aeee85a | 56 | { |
c7ff0d9c | 57 | return 0; |
8aeee85a AB |
58 | } |
59 | ||
c7ff0d9c TS |
60 | /* Returns how long it waited in ms */ |
61 | long (*panic_blink)(int state); | |
62 | EXPORT_SYMBOL(panic_blink); | |
63 | ||
93e13a36 MH |
64 | /* |
65 | * Stop ourself in panic -- architecture code may override this | |
66 | */ | |
67 | void __weak panic_smp_self_stop(void) | |
68 | { | |
69 | while (1) | |
70 | cpu_relax(); | |
71 | } | |
72 | ||
1da177e4 LT |
73 | /** |
74 | * panic - halt the system | |
75 | * @fmt: The text string to print | |
76 | * | |
77 | * Display a message, then perform cleanups. | |
78 | * | |
79 | * This function never returns. | |
80 | */ | |
9402c95f | 81 | void panic(const char *fmt, ...) |
1da177e4 | 82 | { |
93e13a36 | 83 | static DEFINE_SPINLOCK(panic_lock); |
1da177e4 LT |
84 | static char buf[1024]; |
85 | va_list args; | |
c7ff0d9c TS |
86 | long i, i_next = 0; |
87 | int state = 0; | |
1da177e4 | 88 | |
1cac41cb MB |
89 | exynos_trace_stop(); |
90 | ||
91 | if (ecd_get_enable() && | |
92 | ecd_get_debug_panic() && | |
93 | ecd_get_debug_mode() != MODE_DEBUG) { | |
94 | ecd_printf("Debugging in Panic on ECD\n"); | |
95 | ecd_do_break_now(); | |
96 | } | |
190320c3 VM |
97 | /* |
98 | * Disable local interrupts. This will prevent panic_smp_self_stop | |
99 | * from deadlocking the first cpu that invokes the panic, since | |
100 | * there is nothing to prevent an interrupt handler (that runs | |
101 | * after the panic_lock is acquired) from invoking panic again. | |
102 | */ | |
103 | local_irq_disable(); | |
104 | ||
dc009d92 | 105 | /* |
c95dbf27 IM |
106 | * It's possible to come here directly from a panic-assertion and |
107 | * not have preempt disabled. Some functions called from here want | |
dc009d92 | 108 | * preempt to be disabled. No point enabling it later though... |
93e13a36 MH |
109 | * |
110 | * Only one CPU is allowed to execute the panic code from here. For | |
111 | * multiple parallel invocations of panic, all other CPUs either | |
112 | * stop themself or will wait until they are stopped by the 1st CPU | |
113 | * with smp_send_stop(). | |
dc009d92 | 114 | */ |
1cac41cb MB |
115 | if (!spin_trylock(&panic_lock)) { |
116 | exynos_ss_hook_hardlockup_exit(); | |
93e13a36 | 117 | panic_smp_self_stop(); |
1cac41cb | 118 | } |
dc009d92 | 119 | |
5b530fc1 | 120 | console_verbose(); |
1da177e4 LT |
121 | bust_spinlocks(1); |
122 | va_start(args, fmt); | |
123 | vsnprintf(buf, sizeof(buf), fmt, args); | |
124 | va_end(args); | |
1cac41cb MB |
125 | |
126 | #ifdef CONFIG_SEC_DEBUG_AUTO_SUMMARY | |
127 | if (buf[strlen(buf) - 1] == '\n') | |
128 | buf[strlen(buf) - 1] = '\0'; | |
129 | #endif | |
130 | ||
131 | ecd_printf("Kernel Panic - not syncing: %s\n", buf); | |
132 | pr_auto(ASL5, "Kernel panic - not syncing: %s\n", buf); | |
133 | ||
134 | #ifdef CONFIG_RELOCATABLE_KERNEL | |
135 | { | |
136 | extern u64 *__boot_kernel_offset; | |
137 | u64 *kernel_addr = (u64 *) &__boot_kernel_offset; | |
138 | ||
139 | pr_emerg("Kernel loaded at: 0x%llx, offset from compile-time address %llx\n", | |
140 | (u64)((u64)kernel_addr[1] + (u64)kernel_addr[0]), (u64)((u64)kernel_addr[1] - (u64)kernel_addr[2])); | |
141 | } | |
142 | #endif | |
143 | exynos_ss_prepare_panic(); | |
144 | exynos_ss_dump_panic(buf, (size_t)strnlen(buf, sizeof(buf))); | |
5cb27301 | 145 | #ifdef CONFIG_DEBUG_BUGVERBOSE |
6e6f0a1f AK |
146 | /* |
147 | * Avoid nested stack-dumping if a panic occurs during oops processing | |
148 | */ | |
026ee1f6 | 149 | if (!test_taint(TAINT_DIE) && oops_in_progress <= 1) |
6e6f0a1f | 150 | dump_stack(); |
5cb27301 | 151 | #endif |
1cac41cb | 152 | sysrq_sched_debug_show(); |
dc009d92 EB |
153 | /* |
154 | * If we have crashed and we have a crash kernel loaded let it handle | |
155 | * everything else. | |
f06e5153 MH |
156 | * If we want to run this after calling panic_notifiers, pass |
157 | * the "crash_kexec_post_notifiers" option to the kernel. | |
dc009d92 | 158 | */ |
f06e5153 MH |
159 | if (!crash_kexec_post_notifiers) |
160 | crash_kexec(NULL); | |
dc009d92 | 161 | |
dc009d92 EB |
162 | /* |
163 | * Note smp_send_stop is the usual smp shutdown function, which | |
164 | * unfortunately means it may not be hardened to work in a panic | |
165 | * situation. | |
166 | */ | |
1cac41cb MB |
167 | |
168 | if (!ecd_get_enable() || ecd_get_debug_mode() != MODE_DEBUG) | |
169 | smp_send_stop(); | |
1da177e4 | 170 | |
6723734c KC |
171 | /* |
172 | * Run any panic handlers, including those that might need to | |
173 | * add information to the kmsg dump output. | |
174 | */ | |
e041c683 | 175 | atomic_notifier_call_chain(&panic_notifier_list, 0, buf); |
1da177e4 | 176 | |
6723734c KC |
177 | kmsg_dump(KMSG_DUMP_PANIC); |
178 | ||
1cac41cb MB |
179 | exynos_ss_post_panic(); |
180 | ||
f06e5153 MH |
181 | /* |
182 | * If you doubt kdump always works fine in any situation, | |
183 | * "crash_kexec_post_notifiers" offers you a chance to run | |
184 | * panic_notifiers and dumping kmsg before kdump. | |
185 | * Note: since some panic_notifiers can make crashed kernel | |
186 | * more unstable, it can increase risks of the kdump failure too. | |
187 | */ | |
f45d85ff HD |
188 | if (crash_kexec_post_notifiers) |
189 | crash_kexec(NULL); | |
f06e5153 | 190 | |
d014e889 AK |
191 | bust_spinlocks(0); |
192 | ||
08d78658 VK |
193 | /* |
194 | * We may have ended up stopping the CPU holding the lock (in | |
195 | * smp_send_stop()) while still having some valuable data in the console | |
196 | * buffer. Try to acquire the lock then release it regardless of the | |
7625b3a0 VK |
197 | * result. The release will also print the buffers out. Locks debug |
198 | * should be disabled to avoid reporting bad unlock balance when | |
199 | * panic() is not being callled from OOPS. | |
08d78658 | 200 | */ |
7625b3a0 | 201 | debug_locks_off(); |
a623f87a | 202 | console_flush_on_panic(); |
08d78658 | 203 | |
c7ff0d9c TS |
204 | if (!panic_blink) |
205 | panic_blink = no_blink; | |
206 | ||
dc009d92 | 207 | if (panic_timeout > 0) { |
1da177e4 | 208 | /* |
c95dbf27 IM |
209 | * Delay timeout seconds before rebooting the machine. |
210 | * We can't use the "normal" timers since we just panicked. | |
211 | */ | |
70f41003 | 212 | pr_emerg("Rebooting in %d seconds..\n", panic_timeout); |
c95dbf27 | 213 | |
c7ff0d9c | 214 | for (i = 0; i < panic_timeout * 1000; i += PANIC_TIMER_STEP) { |
1da177e4 | 215 | touch_nmi_watchdog(); |
c7ff0d9c TS |
216 | if (i >= i_next) { |
217 | i += panic_blink(state ^= 1); | |
218 | i_next = i + 3600 / PANIC_BLINK_SPD; | |
219 | } | |
220 | mdelay(PANIC_TIMER_STEP); | |
1da177e4 | 221 | } |
4302fbc8 HD |
222 | } |
223 | if (panic_timeout != 0) { | |
c95dbf27 IM |
224 | /* |
225 | * This will not be a clean reboot, with everything | |
226 | * shutting down. But if there is a chance of | |
227 | * rebooting the system it will be rebooted. | |
1da177e4 | 228 | */ |
2f048ea8 | 229 | emergency_restart(); |
1da177e4 LT |
230 | } |
231 | #ifdef __sparc__ | |
232 | { | |
233 | extern int stop_a_enabled; | |
a271c241 | 234 | /* Make sure the user can actually press Stop-A (L1-A) */ |
1da177e4 | 235 | stop_a_enabled = 1; |
d7c0847f | 236 | pr_emerg("Press Stop-A (L1-A) to return to the boot prom\n"); |
1da177e4 LT |
237 | } |
238 | #endif | |
347a8dc3 | 239 | #if defined(CONFIG_S390) |
c95dbf27 IM |
240 | { |
241 | unsigned long caller; | |
242 | ||
243 | caller = (unsigned long)__builtin_return_address(0); | |
244 | disabled_wait(caller); | |
245 | } | |
1da177e4 | 246 | #endif |
d7c0847f | 247 | pr_emerg("---[ end Kernel panic - not syncing: %s\n", buf); |
1da177e4 | 248 | local_irq_enable(); |
c7ff0d9c | 249 | for (i = 0; ; i += PANIC_TIMER_STEP) { |
c22db941 | 250 | touch_softlockup_watchdog(); |
c7ff0d9c TS |
251 | if (i >= i_next) { |
252 | i += panic_blink(state ^= 1); | |
253 | i_next = i + 3600 / PANIC_BLINK_SPD; | |
254 | } | |
255 | mdelay(PANIC_TIMER_STEP); | |
1da177e4 LT |
256 | } |
257 | } | |
1da177e4 LT |
258 | EXPORT_SYMBOL(panic); |
259 | ||
c277e63f | 260 | |
25ddbb18 | 261 | struct tnt { |
c95dbf27 IM |
262 | u8 bit; |
263 | char true; | |
264 | char false; | |
25ddbb18 AK |
265 | }; |
266 | ||
267 | static const struct tnt tnts[] = { | |
c95dbf27 IM |
268 | { TAINT_PROPRIETARY_MODULE, 'P', 'G' }, |
269 | { TAINT_FORCED_MODULE, 'F', ' ' }, | |
8c90487c | 270 | { TAINT_CPU_OUT_OF_SPEC, 'S', ' ' }, |
c95dbf27 IM |
271 | { TAINT_FORCED_RMMOD, 'R', ' ' }, |
272 | { TAINT_MACHINE_CHECK, 'M', ' ' }, | |
273 | { TAINT_BAD_PAGE, 'B', ' ' }, | |
274 | { TAINT_USER, 'U', ' ' }, | |
275 | { TAINT_DIE, 'D', ' ' }, | |
276 | { TAINT_OVERRIDDEN_ACPI_TABLE, 'A', ' ' }, | |
277 | { TAINT_WARN, 'W', ' ' }, | |
278 | { TAINT_CRAP, 'C', ' ' }, | |
92946bc7 | 279 | { TAINT_FIRMWARE_WORKAROUND, 'I', ' ' }, |
2449b8ba | 280 | { TAINT_OOT_MODULE, 'O', ' ' }, |
57673c2b | 281 | { TAINT_UNSIGNED_MODULE, 'E', ' ' }, |
69361eef | 282 | { TAINT_SOFTLOCKUP, 'L', ' ' }, |
c5f45465 | 283 | { TAINT_LIVEPATCH, 'K', ' ' }, |
25ddbb18 AK |
284 | }; |
285 | ||
1da177e4 LT |
286 | /** |
287 | * print_tainted - return a string to represent the kernel taint state. | |
288 | * | |
289 | * 'P' - Proprietary module has been loaded. | |
290 | * 'F' - Module has been forcibly loaded. | |
291 | * 'S' - SMP with CPUs not designed for SMP. | |
292 | * 'R' - User forced a module unload. | |
9aa5e993 | 293 | * 'M' - System experienced a machine check exception. |
1da177e4 | 294 | * 'B' - System has hit bad_page. |
34f5a398 | 295 | * 'U' - Userspace-defined naughtiness. |
a8005992 | 296 | * 'D' - Kernel has oopsed before |
95b570c9 NH |
297 | * 'A' - ACPI table overridden. |
298 | * 'W' - Taint on warning. | |
061b1bd3 | 299 | * 'C' - modules from drivers/staging are loaded. |
92946bc7 | 300 | * 'I' - Working around severe firmware bug. |
2449b8ba | 301 | * 'O' - Out-of-tree module has been loaded. |
57673c2b | 302 | * 'E' - Unsigned module has been loaded. |
bc53a3f4 | 303 | * 'L' - A soft lockup has previously occurred. |
c5f45465 | 304 | * 'K' - Kernel has been live patched. |
1da177e4 | 305 | * |
fe002a41 | 306 | * The string is overwritten by the next call to print_tainted(). |
1da177e4 | 307 | */ |
1da177e4 LT |
308 | const char *print_tainted(void) |
309 | { | |
01284764 | 310 | static char buf[ARRAY_SIZE(tnts) + sizeof("Tainted: ")]; |
25ddbb18 AK |
311 | |
312 | if (tainted_mask) { | |
313 | char *s; | |
314 | int i; | |
315 | ||
316 | s = buf + sprintf(buf, "Tainted: "); | |
317 | for (i = 0; i < ARRAY_SIZE(tnts); i++) { | |
318 | const struct tnt *t = &tnts[i]; | |
319 | *s++ = test_bit(t->bit, &tainted_mask) ? | |
320 | t->true : t->false; | |
321 | } | |
322 | *s = 0; | |
323 | } else | |
1da177e4 | 324 | snprintf(buf, sizeof(buf), "Not tainted"); |
c95dbf27 IM |
325 | |
326 | return buf; | |
1da177e4 LT |
327 | } |
328 | ||
25ddbb18 | 329 | int test_taint(unsigned flag) |
1da177e4 | 330 | { |
25ddbb18 AK |
331 | return test_bit(flag, &tainted_mask); |
332 | } | |
333 | EXPORT_SYMBOL(test_taint); | |
334 | ||
335 | unsigned long get_taint(void) | |
336 | { | |
337 | return tainted_mask; | |
1da177e4 | 338 | } |
dd287796 | 339 | |
373d4d09 RR |
340 | /** |
341 | * add_taint: add a taint flag if not already set. | |
342 | * @flag: one of the TAINT_* constants. | |
343 | * @lockdep_ok: whether lock debugging is still OK. | |
344 | * | |
345 | * If something bad has gone wrong, you'll want @lockdebug_ok = false, but for | |
346 | * some notewortht-but-not-corrupting cases, it can be set to true. | |
347 | */ | |
348 | void add_taint(unsigned flag, enum lockdep_ok lockdep_ok) | |
dd287796 | 349 | { |
373d4d09 | 350 | if (lockdep_ok == LOCKDEP_NOW_UNRELIABLE && __debug_locks_off()) |
d7c0847f | 351 | pr_warn("Disabling lock debugging due to kernel taint\n"); |
9eeba613 | 352 | |
25ddbb18 | 353 | set_bit(flag, &tainted_mask); |
dd287796 | 354 | } |
1da177e4 | 355 | EXPORT_SYMBOL(add_taint); |
dd287796 AM |
356 | |
357 | static void spin_msec(int msecs) | |
358 | { | |
359 | int i; | |
360 | ||
361 | for (i = 0; i < msecs; i++) { | |
362 | touch_nmi_watchdog(); | |
363 | mdelay(1); | |
364 | } | |
365 | } | |
366 | ||
367 | /* | |
368 | * It just happens that oops_enter() and oops_exit() are identically | |
369 | * implemented... | |
370 | */ | |
371 | static void do_oops_enter_exit(void) | |
372 | { | |
373 | unsigned long flags; | |
374 | static int spin_counter; | |
375 | ||
376 | if (!pause_on_oops) | |
377 | return; | |
378 | ||
379 | spin_lock_irqsave(&pause_on_oops_lock, flags); | |
380 | if (pause_on_oops_flag == 0) { | |
381 | /* This CPU may now print the oops message */ | |
382 | pause_on_oops_flag = 1; | |
383 | } else { | |
384 | /* We need to stall this CPU */ | |
385 | if (!spin_counter) { | |
386 | /* This CPU gets to do the counting */ | |
387 | spin_counter = pause_on_oops; | |
388 | do { | |
389 | spin_unlock(&pause_on_oops_lock); | |
390 | spin_msec(MSEC_PER_SEC); | |
391 | spin_lock(&pause_on_oops_lock); | |
392 | } while (--spin_counter); | |
393 | pause_on_oops_flag = 0; | |
394 | } else { | |
395 | /* This CPU waits for a different one */ | |
396 | while (spin_counter) { | |
397 | spin_unlock(&pause_on_oops_lock); | |
398 | spin_msec(1); | |
399 | spin_lock(&pause_on_oops_lock); | |
400 | } | |
401 | } | |
402 | } | |
403 | spin_unlock_irqrestore(&pause_on_oops_lock, flags); | |
404 | } | |
405 | ||
406 | /* | |
c95dbf27 IM |
407 | * Return true if the calling CPU is allowed to print oops-related info. |
408 | * This is a bit racy.. | |
dd287796 AM |
409 | */ |
410 | int oops_may_print(void) | |
411 | { | |
412 | return pause_on_oops_flag == 0; | |
413 | } | |
414 | ||
415 | /* | |
416 | * Called when the architecture enters its oops handler, before it prints | |
c95dbf27 IM |
417 | * anything. If this is the first CPU to oops, and it's oopsing the first |
418 | * time then let it proceed. | |
dd287796 | 419 | * |
c95dbf27 IM |
420 | * This is all enabled by the pause_on_oops kernel boot option. We do all |
421 | * this to ensure that oopses don't scroll off the screen. It has the | |
422 | * side-effect of preventing later-oopsing CPUs from mucking up the display, | |
423 | * too. | |
dd287796 | 424 | * |
c95dbf27 IM |
425 | * It turns out that the CPU which is allowed to print ends up pausing for |
426 | * the right duration, whereas all the other CPUs pause for twice as long: | |
427 | * once in oops_enter(), once in oops_exit(). | |
dd287796 AM |
428 | */ |
429 | void oops_enter(void) | |
430 | { | |
bdff7870 | 431 | tracing_off(); |
c95dbf27 IM |
432 | /* can't trust the integrity of the kernel anymore: */ |
433 | debug_locks_off(); | |
dd287796 AM |
434 | do_oops_enter_exit(); |
435 | } | |
436 | ||
2c3b20e9 AV |
437 | /* |
438 | * 64-bit random ID for oopses: | |
439 | */ | |
440 | static u64 oops_id; | |
441 | ||
442 | static int init_oops_id(void) | |
443 | { | |
444 | if (!oops_id) | |
445 | get_random_bytes(&oops_id, sizeof(oops_id)); | |
d6624f99 AV |
446 | else |
447 | oops_id++; | |
2c3b20e9 AV |
448 | |
449 | return 0; | |
450 | } | |
451 | late_initcall(init_oops_id); | |
452 | ||
863a6049 | 453 | void print_oops_end_marker(void) |
71c33911 AV |
454 | { |
455 | init_oops_id(); | |
1cac41cb MB |
456 | |
457 | if (mach_panic_string) | |
458 | printk(KERN_WARNING "Board Information: %s\n", | |
459 | mach_panic_string); | |
460 | ||
d7c0847f | 461 | pr_warn("---[ end trace %016llx ]---\n", (unsigned long long)oops_id); |
71c33911 AV |
462 | } |
463 | ||
dd287796 AM |
464 | /* |
465 | * Called when the architecture exits its oops handler, after printing | |
466 | * everything. | |
467 | */ | |
468 | void oops_exit(void) | |
469 | { | |
470 | do_oops_enter_exit(); | |
71c33911 | 471 | print_oops_end_marker(); |
456b565c | 472 | kmsg_dump(KMSG_DUMP_OOPS); |
dd287796 | 473 | } |
3162f751 | 474 | |
79b4cc5e | 475 | #ifdef WANT_WARN_ON_SLOWPATH |
0f6f49a8 LT |
476 | struct slowpath_args { |
477 | const char *fmt; | |
a8f18b90 | 478 | va_list args; |
0f6f49a8 | 479 | }; |
bd89bb29 | 480 | |
b2be0527 BH |
481 | static void warn_slowpath_common(const char *file, int line, void *caller, |
482 | unsigned taint, struct slowpath_args *args) | |
0f6f49a8 | 483 | { |
de7edd31 SRRH |
484 | disable_trace_on_warning(); |
485 | ||
dcb6b452 AT |
486 | pr_warn("------------[ cut here ]------------\n"); |
487 | pr_warn("WARNING: CPU: %d PID: %d at %s:%d %pS()\n", | |
488 | raw_smp_processor_id(), current->pid, file, line, caller); | |
74853dba | 489 | |
0f6f49a8 LT |
490 | if (args) |
491 | vprintk(args->fmt, args->args); | |
a8f18b90 | 492 | |
9e3961a0 PB |
493 | if (panic_on_warn) { |
494 | /* | |
495 | * This thread may hit another WARN() in the panic path. | |
496 | * Resetting this prevents additional WARN() from panicking the | |
497 | * system on this thread. Other threads are blocked by the | |
498 | * panic_mutex in panic(). | |
499 | */ | |
500 | panic_on_warn = 0; | |
501 | panic("panic_on_warn set ...\n"); | |
502 | } | |
503 | ||
a8f18b90 AV |
504 | print_modules(); |
505 | dump_stack(); | |
506 | print_oops_end_marker(); | |
373d4d09 RR |
507 | /* Just a warning, don't kill lockdep. */ |
508 | add_taint(taint, LOCKDEP_STILL_OK); | |
a8f18b90 | 509 | } |
0f6f49a8 LT |
510 | |
511 | void warn_slowpath_fmt(const char *file, int line, const char *fmt, ...) | |
512 | { | |
513 | struct slowpath_args args; | |
514 | ||
515 | args.fmt = fmt; | |
516 | va_start(args.args, fmt); | |
b2be0527 BH |
517 | warn_slowpath_common(file, line, __builtin_return_address(0), |
518 | TAINT_WARN, &args); | |
0f6f49a8 LT |
519 | va_end(args.args); |
520 | } | |
57adc4d2 AK |
521 | EXPORT_SYMBOL(warn_slowpath_fmt); |
522 | ||
b2be0527 BH |
523 | void warn_slowpath_fmt_taint(const char *file, int line, |
524 | unsigned taint, const char *fmt, ...) | |
525 | { | |
526 | struct slowpath_args args; | |
527 | ||
528 | args.fmt = fmt; | |
529 | va_start(args.args, fmt); | |
530 | warn_slowpath_common(file, line, __builtin_return_address(0), | |
531 | taint, &args); | |
532 | va_end(args.args); | |
533 | } | |
534 | EXPORT_SYMBOL(warn_slowpath_fmt_taint); | |
535 | ||
57adc4d2 AK |
536 | void warn_slowpath_null(const char *file, int line) |
537 | { | |
b2be0527 BH |
538 | warn_slowpath_common(file, line, __builtin_return_address(0), |
539 | TAINT_WARN, NULL); | |
57adc4d2 AK |
540 | } |
541 | EXPORT_SYMBOL(warn_slowpath_null); | |
79b4cc5e AV |
542 | #endif |
543 | ||
3162f751 | 544 | #ifdef CONFIG_CC_STACKPROTECTOR |
54371a43 | 545 | |
3162f751 AV |
546 | /* |
547 | * Called when gcc's -fstack-protector feature is used, and | |
548 | * gcc detects corruption of the on-stack canary value | |
549 | */ | |
a7330c99 | 550 | __visible void __stack_chk_fail(void) |
3162f751 | 551 | { |
517a92c4 IM |
552 | panic("stack-protector: Kernel stack is corrupted in: %p\n", |
553 | __builtin_return_address(0)); | |
3162f751 AV |
554 | } |
555 | EXPORT_SYMBOL(__stack_chk_fail); | |
54371a43 | 556 | |
3162f751 | 557 | #endif |
f44dd164 RR |
558 | |
559 | core_param(panic, panic_timeout, int, 0644); | |
560 | core_param(pause_on_oops, pause_on_oops, int, 0644); | |
9e3961a0 | 561 | core_param(panic_on_warn, panic_on_warn, int, 0644); |
d404ab0a | 562 | |
f06e5153 MH |
563 | static int __init setup_crash_kexec_post_notifiers(char *s) |
564 | { | |
565 | crash_kexec_post_notifiers = true; | |
566 | return 0; | |
567 | } | |
568 | early_param("crash_kexec_post_notifiers", setup_crash_kexec_post_notifiers); | |
569 | ||
d404ab0a OH |
570 | static int __init oops_setup(char *s) |
571 | { | |
572 | if (!s) | |
573 | return -EINVAL; | |
574 | if (!strcmp(s, "panic")) | |
575 | panic_on_oops = 1; | |
576 | return 0; | |
577 | } | |
578 | early_param("oops", oops_setup); |