[linux-morello] Re: [PATCH v3 12/25] mm/madvise: Add the PCuABI reservation constraints

On 15/04/2024 15:21, Amit Daniel Kachhap wrote:

SYSCALL_DEFINE5(process_madvise, int, pidfd, const struct iovec __user *, vec, @@ -1506,7 +1523,7 @@ SYSCALL_DEFINE5(process_madvise, int, pidfd, const struct iovec __user *, vec, while (iov_iter_count(&iter)) { ret = do_madvise(mm, user_ptr_addr(iter_iov_addr(&iter)),

• 			iter_iov_len(&iter), behavior);
  

• 			iter_iov_len(&iter), behavior, false);
  

process_madvise() should only check capabilities if targeting the current process (see the spec). For now let's just skip the checks by passing true.

Kevin

if (ret < 0)
	break;
iov_iter_advance(&iter, iter_iov_len(&iter));