Re: [PATCH] RDMA/core: EPERM should be returned when # of pined pages is over ulimit

Gotou, Yasunori/五島康文 <y-goto@xxxxxxxxxxxxxx> · Fri, 27 Aug 2021 09:08:44 +0900

On 2021/08/26 22:32, Jason Gunthorpe wrote:
On Fri, Aug 20, 2021 at 05:45:54PM +0900, Yasunori Goto wrote:

static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
    :
    :
         if (locked > lock_limit && !capable(CAP_IPC_LOCK)) {
                 pr_err("SEV: %lu locked pages exceed the lock limit of
%lu.\n", locked, lock_limit);
                 return ERR_PTR(-ENOMEM);
         }

I think it is better than nothing. How do you think?

Unprivileged user space should not be allowed to cause the kernel to
print messages.

Hmm... Ok. I see.

Thank you for your answer!

Bye,
---
Yasunori Goto