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From: Daniel Micay <danielmicay@gmail.com>
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Subject: Re: [PATCH] prevent allocs than PTRDIFF_MAX via mremap
Date: Sat, 31 Oct 2015 05:20:10 -0400
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It seems like a call to __vm_wait() might also be needed here when
MREMAP_FIXED is passed as a flag. I don't know anything about robust
futexes though, so someone else will need to figure that out.