From: Dave Martin <Dave.Martin@xxxxxxx> Since normal execution of any non-branch instruction resets the PSTATE BTYPE field to 0, so do the same thing when emulating a trapped instruction. Branches don't trap directly, so we should never need to assign a non-zero value to BTYPE here. Signed-off-by: Dave Martin <Dave.Martin@xxxxxxx> Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx> Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> --- arch/arm64/kernel/traps.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 4fa8b92b8624..be71e5ef9ae0 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -332,6 +332,8 @@ void arm64_skip_faulting_instruction(struct pt_regs *regs, unsigned long size) if (compat_user_mode(regs)) advance_itstate(regs); + else + regs->pstate &= ~PSR_BTYPE_MASK; } static LIST_HEAD(undef_hook); -- 2.20.1
