17.6.1. Kernel panic
On panic, the kernel dies, and so does our terminal.
The panic trace looks like:
panic: loading out-of-tree module taints kernel. panic myinit Kernel panic - not syncing: hello panic CPU: 0 PID: 53 Comm: insmod Tainted: G O 4.16.0 #6 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.0-0-g63451fca13-prebuilt.qemu-project.org 04/01/2014 Call Trace: dump_stack+0x7d/0xba ? 0xffffffffc0000000 panic+0xda/0x213 ? printk+0x43/0x4b ? 0xffffffffc0000000 myinit+0x1d/0x20 [panic] do_one_initcall+0x3e/0x170 do_init_module+0x5b/0x210 load_module+0x2035/0x29d0 ? kernel_read_file+0x7d/0x140 ? SyS_finit_module+0xa8/0xb0 SyS_finit_module+0xa8/0xb0 do_syscall_64+0x6f/0x310 ? trace_hardirqs_off_thunk+0x1a/0x32 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7ffff7b36206 RSP: 002b:00007fffffffeb78 EFLAGS: 00000206 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 000000000000005c RCX: 00007ffff7b36206 RDX: 0000000000000000 RSI: 000000000069e010 RDI: 0000000000000003 RBP: 000000000069e010 R08: 00007ffff7ddd320 R09: 0000000000000000 R10: 00007ffff7ddd320 R11: 0000000000000206 R12: 0000000000000003 R13: 00007fffffffef4a R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled ---[ end Kernel panic - not syncing: hello panic
Notice how our panic message hello panic is visible at:
Kernel panic - not syncing: hello panic