From: Ben Hutchings <ben@decadent.org.uk>
Date: Fri, 29 Aug 2014 22:18:58 +0000 (-0700)
Subject: ocfs2: do not write error flag to user structure we cannot copy from/to
X-Git-Tag: omap-fixes-against-v3.17-rc3~22^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2b462638e41ea62230297c21c4da9955937b7a3c;p=pandora-kernel.git

ocfs2: do not write error flag to user structure we cannot copy from/to

If we failed to copy from the structure, writing back the flags leaks 31
bits of kernel memory (the rest of the ir_flags field).

In any case, if we cannot copy from/to the structure, why should we
expect putting just the flags to work?

Also make sure ocfs2_info_handle_freeinode() returns the right error
code if the copy_to_user() fails.

Fixes: ddee5cdb70e6 ('Ocfs2: Add new OCFS2_IOC_INFO ioctl for ocfs2 v8.')
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Joel Becker <jlbec@evilplan.org>
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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