Since the unwind_ctrl_block::lr_addr is finally passed to stackframe::lr_addr, that value will be exposed unconditionally. Thus it should be initialized. Without this fix, when unwind_frame() doesn't update the unwind_ctrl_block::lr_addr (e.g. 'lr' register is not saved in the target function), stackframe::lr_addr will contain a wrong value. Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx> --- arch/arm/kernel/unwind.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c index a37ea6c772cd..93e767682cf4 100644 --- a/arch/arm/kernel/unwind.c +++ b/arch/arm/kernel/unwind.c @@ -404,6 +404,7 @@ int unwind_frame(struct stackframe *frame) ctrl.vrs[SP] = frame->sp; ctrl.vrs[LR] = frame->lr; ctrl.vrs[PC] = 0; + ctrl.lr_addr = 0; if (idx->insn == 1) /* can't unwind */
