Messages in this thread | | | From | Andy Lutomirski <> | Date | Fri, 11 Apr 2014 15:07:38 -0700 | Subject | Re: [PATCH 2/6] shm: add sealing API |
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On Fri, Apr 11, 2014 at 2:42 PM, David Herrmann <dh.herrmann@gmail.com> wrote: > Hi > > On Fri, Apr 11, 2014 at 11:36 PM, Andy Lutomirski <luto@amacapital.net> wrote: >> A quick grep of the kernel tree finds exactly zero code paths >> incrementing i_mmap_writable outside of mmap and fork. >> >> Or do you mean a different kind of write ref? What am I missing here? > > Sorry, I meant i_writecount.
I bet this is missing from lots of places. For example, I can't find any write_access stuff in the rdma code.
I suspect that the VM_DENYWRITE code is just generally racy.
--Andy
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