From: Jan Kara <jack@suse.cz>
Date: Thu, 21 May 2015 14:05:52 +0000 (+0200)
Subject: fs: Fix S_NOSEC handling
X-Git-Tag: v3.2.71~62
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=40ce76dd060fd92f6f13398fd63c0df8dfd16d0a;p=pandora-kernel.git

fs: Fix S_NOSEC handling

commit 2426f3910069ed47c0cc58559a6d088af7920201 upstream.

file_remove_suid() could mistakenly set S_NOSEC inode bit when root was
modifying the file. As a result following writes to the file by ordinary
user would avoid clearing suid or sgid bits.

Fix the bug by checking actual mode bits before setting S_NOSEC.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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