[PATCH] mmap.2: mmap with address NULL and MAP_FIXED results in EPERM

From	Theodore Dubois <tblodt@icloud.com>
Newsgroups	linux.kernel
Subject	[PATCH] mmap.2: mmap with address NULL and MAP_FIXED results in EPERM
Date	2017-06-15 22:20 +0200
Message-ID	<tSJpf-75B-5@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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This can be verified with a simple test program. I'm not sure if this is
a kernel bug or a documentation bug, though...
---
 man2/mmap.2 | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/man2/mmap.2 b/man2/mmap.2
index d1942b52a..58361c837 100644
--- a/man2/mmap.2
+++ b/man2/mmap.2
@@ -515,6 +515,13 @@ was mounted no-exec.
 .\" (Since 2.4.25 / 2.6.0.)
 .TP
 .B EPERM
+The
+.I addr
+argument is 0 and
+.B MAP_FIXED
+is specified.
+.TP
+.B EPERM
 The operation was prevented by a file seal; see
 .BR fcntl (2).
 .TP
-- 
2.13.1

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[PATCH] mmap.2: mmap with address NULL and MAP_FIXED results in EPERM Theodore Dubois <tblodt@icloud.com> - 2017-06-15 22:20 +0200
  Re: [PATCH] mmap.2: mmap with address NULL and MAP_FIXED results in  EPERM Michal Hocko <mhocko@kernel.org> - 2017-06-16 17:30 +0200

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