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Re: kern/53474: mmap get anon execuable memory return MAP_FAILED
The following reply was made to PR kern/53474; it has been noted by GNATS.
From: Martin Husemann <martin%duskware.de@localhost>
Subject: Re: kern/53474: mmap get anon execuable memory return MAP_FAILED
Date: Thu, 26 Jul 2018 16:22:53 +0200
On Thu, Jul 26, 2018 at 02:15:00PM +0000, zh_jq%outlook.com@localhost wrote:
> void *retval = mmap(NULL, 4096, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANON, -1, 0);
You can not create writable + executable mappings when pax mprotect is
active (which is the default on many architectures). See mremap(2).
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