Re: kern/49692: impossibly large mmap does not fail

[Justin Cormack <justin%specialbusservice.com@localhost>]

On 24 February 2015 at 18:53, Martin Husemann <martin%duskware.de@localhost> wrote:
> Note that -1 is not a multiple of the machines PAGE_SIZE, so it gets
> rounded up to the next full page.

Ah yes, -8192 say is ok and gives ENOMEM. But it is size_t so it is
unsigned, so with *size_t)-1 that is an unsigned overflow to 0 that is
taking place, which is undefined behaviour.

Justin