Re: [PATCH] proc: fix NULL dereference when reading /proc/<pid>/auxv

[Michal Hocko]

So here is my RFC as an alternative. Thoughts? Please note that we
currently have only very few users of use_mm() API in the kernel
so a risk of a regression is not really high. usb/gadget are using it
only temporarily. The remaining is vhost which operates on a remote mm
and I have no idea whether somebody might abuse /proc/vhost/mem or
anything - let's add Michael to the CC list. I am pretty sure nobody
abuse oom_reaper proc directory as this one is pretty new and such a
usage would be pretty much undefined as the reaper unmaps the address
space.
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