panic: call panic handlers before kmsg_dump

Since the panic handlers may produce additional information (via printk) for the kernel log, it should be reported as part of the panic output saved by kmsg_dump(). Without this re-ordering, nothing that adds information to a panic will show up in pstore's view when kmsg_dump runs, and is therefore not visible to crash reporting tools that examine pstore output.

Kees Cook committed 13 years ago

Commit 67237341 parent 63259321 file · +6 −2Browse files

Unified · Split

kernel/panic.c+6−2

@@ -123,10 +123,14 @@ void panic(const char *fmt, ...) · 122 unmodified lines
123	*/	123	*/
124	smp_send_stop();	124	smp_send_stop();
125		125
126	kmsg_dump(KMSG_DUMP_PANIC);	126	/*
127		127	* Run any panic handlers, including those that might need to
		128	* add information to the kmsg dump output.
		129	*/
128	atomic_notifier_call_chain(&panic_notifier_list, 0, buf);	130	atomic_notifier_call_chain(&panic_notifier_list, 0, buf);
129		131
		132	kmsg_dump(KMSG_DUMP_PANIC);
		133
130	bust_spinlocks(0);	134	bust_spinlocks(0);
131		135
132	if (!panic_blink)	136	if (!panic_blink)