From 67f5593419878798bb306632cdca0698a2dd3cbd Mon Sep 17 00:00:00 2001 From: Vasily Gorbik Date: Fri, 22 Nov 2019 15:53:30 +0100 Subject: [PATCH] s390/unwind: report an error if pt_regs are not on stack If unwinder is looking at pt_regs which is not on stack then something went wrong and an error has to be reported rather than successful unwinding termination. Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik --- arch/s390/kernel/unwind_bc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/kernel/unwind_bc.c b/arch/s390/kernel/unwind_bc.c index fa111d3d378f..fd90b6e21663 100644 --- a/arch/s390/kernel/unwind_bc.c +++ b/arch/s390/kernel/unwind_bc.c @@ -76,7 +76,7 @@ bool unwind_next_frame(struct unwind_state *state) /* No back-chain, look for a pt_regs structure */ sp = state->sp + STACK_FRAME_OVERHEAD; if (!on_stack(info, sp, sizeof(struct pt_regs))) - goto out_stop; + goto out_err; regs = (struct pt_regs *) sp; if (READ_ONCE_NOCHECK(regs->psw.mask) & PSW_MASK_PSTATE) goto out_stop;