From: Graff Yang <graff.yang@gmail.com>
Date: Tue, 18 Aug 2009 21:11:17 +0000 (-0700)
Subject: nommu: check fd read permission in validate_mmap_request()
X-Git-Tag: v2.6.31-rc7~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=28d7a6ae92c099d81cbea08c20be0d2cf7ccd7ca;p=pandora-kernel.git

nommu: check fd read permission in validate_mmap_request()

According to the POSIX (1003.1-2008), the file descriptor shall have been
opened with read permission, regardless of the protection options specified to
mmap().  The ltp test cases mmap06/07 need this.

Signed-off-by: Graff Yang <graff.yang@gmail.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Greg Ungerer <gerg@snapgear.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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