[PATCH v2 3/6] KEYS: Prevent overflow of user->{qnkeys,qnbytes} in key_alloc()

[Jarkko Sakkinen]

On Mon, Oct 19, 2026 at 12:23:32PM -0700, Eric Biggers wrote:
> On Mon, Oct 19, 2026 at 09:17:23PM +0300, Jarkko Sakkinen wrote:
> > Add the missing overflow checks for user->qnkeys and user->qnbytes
> > in order keep calculations within INT_MAX range, which is the
> > absolute maximum quota.
> > 
> > Cc: stable at vger.kernel.org
> > Assisted-by: LLM
> > Fixes: 7e047ef5fe2d ("[PATCH] keys: sort out key quota system")
> > Reviewed-by: David Howells <dhowells at redhat.com>
> > Signed-off-by: Jarkko Sakkinen <jarkko at kernel.org>
> 
> Don't keyctl_chown_key() and key_payload_reserve() need similar fixes?

Thanks, I'll investigate.

Unless any specific reason, I would not hold merging this series. I have
written down a follow-up backlog i.e., post-tasks once this series is
merged.

> 
> - Eric

Br, Jarkko