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Commit 578bd4df authored by Jason Wessel's avatar Jason Wessel
Browse files

kdb: Fix early debugging crash regression 



The kdb_current legally be equal to NULL in the early boot of the x86
arch.  The problem pcan be observed by booting with the kernel arguments:

    earlyprintk=vga ekgdboc=kbd kgdbwait

The kdb shell will oops on entry and recursively fault because it
cannot get past the final stage of shell initialization.

Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
parent 834b2964

kernel/debug/kdb/kdb_main.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -1127,7 +1127,7 @@ static int kdb_local(kdb_reason_t reason, int error, struct pt_regs *regs, 
		/* special case below */

		/* special case below */

	} else {

	} else {

		kdb_printf("\nEntering kdb (current=0x%p, pid %d) ",

		kdb_printf("\nEntering kdb (current=0x%p, pid %d) ",

			   kdb_current, kdb_current->pid);

			   kdb_current, kdb_current ? kdb_current->pid : 0);

#if defined(CONFIG_SMP)

#if defined(CONFIG_SMP)

		kdb_printf("on processor %d ", raw_smp_processor_id());

		kdb_printf("on processor %d ", raw_smp_processor_id());

#endif

#endif