linux/kernel/panic.c

1 // SPDX-License-Identifier: GPL-2.0-only
9  * This function is used through-out the kernel (including mm and fs)
137 /* Returns how long it waited in ms */
142  * Stop ourself in panic -- architecture code may override this
163  * per-CPU features such as virtualization extensions.
246  * and then performs the secondary CPUs shutdown - we cannot have
269  *	panic - halt the system
305 	 * It's possible to come here directly from a panic-assertion and  in panic()
331 	if (len && buf[len - 1] == '\n')  in panic()
332 		buf[len - 1] = '\0';  in panic()
334 	pr_emerg("Kernel panic - not syncing: %s\n", buf);  in panic()
337 	 * Avoid nested stack-dumping if a panic occurs during oops processing  in panic()
405 		 * Delay timeout seconds before rebooting the machine.  in panic()
432 		/* Make sure the user can actually press Stop-A (L1-A) */  in panic()
434 		pr_emerg("Press Stop-A (L1-A) from sun keyboard or send break\n"  in panic()
441 	pr_emerg("---[ end Kernel panic - not syncing: %s ]---\n", buf);  in panic()
467  * TAINT_FORCED_RMMOD could be a per-module flag but the module
493  * print_tainted - return a string to represent the kernel taint state.
495  * For individual taint flag meanings, see Documentation/admin-guide/sysctl/kernel.rst
514 					t->c_true : t->c_false;  in print_tainted()
540  * some notewortht-but-not-corrupting cases, it can be set to true.
591 			} while (--spin_counter);  in do_oops_enter_exit()
606  * Return true if the calling CPU is allowed to print oops-related info.
621  * side-effect of preventing later-oopsing CPUs from mucking up the display,
641 	pr_warn("---[ end trace %016llx ]---\n", 0ULL);  in print_oops_end_marker()
667 			raw_smp_processor_id(), current->pid, file, line,  in __warn()
671 			raw_smp_processor_id(), current->pid, caller);  in __warn()
674 		vprintk(args->fmt, args->args);  in __warn()
740 	memset(__start_once, 0, __end_once - __start_once);  in clear_warn_once_set()
761  * Called when gcc's -fstack-protector feature is used, and
762  * gcc detects corruption of the on-stack canary value
767 	panic("stack-protector: Kernel stack is corrupted in: %pB",  in __stack_chk_fail()
784 		return -EINVAL;  in oops_setup()
796 		return -EINVAL;  in panic_on_taint_setup()
800 		return -EINVAL;  in panic_on_taint_setup()
802 	/* make sure panic_on_taint doesn't hold out-of-range TAINT flags */  in panic_on_taint_setup()
806 		return -EINVAL;  in panic_on_taint_setup()