bad_mode() handler is called for invalid or undefined instruction in el1 level or when irq,fiq,sync or error situation happen in el1 or el0 level.
As per latest code, above abnormal situation may not result in panic always due to die() call if user mode is determined at that moment. That will just result in kill of current process and panic will be avoided which it must not.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=200637 Signed-off-by: Hari Vyas hari.vyas@broadcom.com --- arch/arm64/kernel/traps.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index d399d45..716ee73 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -621,7 +621,6 @@ asmlinkage void bad_mode(struct pt_regs *regs, int reason, unsigned int esr) handler[reason], smp_processor_id(), esr, esr_get_class_string(esr));
- die("Oops - bad mode", regs, 0); local_daif_mask(); panic("bad mode"); }