On Thu, Aug 15, 2019 at 5:44 PM Catalin Marinas <catalin.mari...@arm.com> wrote:
>
> Require that arg{3,4,5} of the PR_{SET,GET}_TAGGED_ADDR_CTRL prctl and
> arg2 of the PR_GET_TAGGED_ADDR_CTRL prctl() are zero rather than ignored
> for future extensions.
>
> Signed-off-by: Catalin Marinas <catalin.mari...@arm.com>Acked-by: Andrey Konovalov <andreyk...@google.com> > --- > kernel/sys.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/kernel/sys.c b/kernel/sys.c > index c6c4d5358bd3..ec48396b4943 100644 > --- a/kernel/sys.c > +++ b/kernel/sys.c > @@ -2499,9 +2499,13 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, > arg2, unsigned long, arg3, > error = PAC_RESET_KEYS(me, arg2); > break; > case PR_SET_TAGGED_ADDR_CTRL: > + if (arg3 || arg4 || arg5) > + return -EINVAL; > error = SET_TAGGED_ADDR_CTRL(arg2); > break; > case PR_GET_TAGGED_ADDR_CTRL: > + if (arg2 || arg3 || arg4 || arg5) > + return -EINVAL; > error = GET_TAGGED_ADDR_CTRL(); > break; > default:
