From: Miklos Szeredi <mszeredi@suse.cz>
Date: Wed, 15 Aug 2012 11:01:24 +0000 (+0200)
Subject: vfs: canonicalize create mode in build_open_flags()
X-Git-Tag: v3.2.29~64
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8dd138a98241fc7be5d89950e6e09bbc18024a53;p=pandora-kernel.git

vfs: canonicalize create mode in build_open_flags()

commit e68726ff72cf7ba5e7d789857fcd9a75ca573f03 upstream.

Userspace can pass weird create mode in open(2) that we canonicalize to
"(mode & S_IALLUGO) | S_IFREG" in vfs_create().

The problem is that we use the uncanonicalized mode before calling vfs_create()
with unforseen consequences.

So do the canonicalization early in build_open_flags().

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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