From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 7 May 2015 23:24:57 +0000 (-0400)
Subject: namei: d_is_negative() should be checked before ->d_seq validation
X-Git-Tag: omap-for-v4.2/omap1-v2~15^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=766c4cbfacd8634d7580bac6a1b8456e63de3e84;p=pandora-kernel.git

namei: d_is_negative() should be checked before ->d_seq validation

Fetching ->d_inode, verifying ->d_seq and finding d_is_negative() to
be true does *not* mean that inode we'd fetched had been NULL - that
holds only while ->d_seq is still unchanged.

Shift d_is_negative() checks into lookup_fast() prior to ->d_seq
verification.

Reported-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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