| Message ID | 20190815154403.16473-3-catalin.marinas@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64 tagged address ABI | expand |
On Thu, Aug 15, 2019 at 5:44 PM Catalin Marinas <catalin.marinas@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.marinas@arm.com> Acked-by: Andrey Konovalov <andreyknvl@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:
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:
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.marinas@arm.com> --- kernel/sys.c | 4 ++++ 1 file changed, 4 insertions(+)