From: Ian Kent <raven@themaw.net>
Date: Tue, 18 Jan 2011 04:06:04 +0000 (+0800)
Subject: autofs4 - fix get_next_positive_dentry()
X-Git-Tag: v2.6.38-rc1~11^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c14cc63a63e94d490ac6517a555113c30d420db4;p=pandora-kernel.git

autofs4 - fix get_next_positive_dentry()

The initialization condition in fs/autofs4/expire.c:get_next_positive_dentry()
appears to be incorrect. If prev == NULL I believe that root should be
returned.

Further down, at the current dentry check for it being simple_positive()
it looks like the d_lock for dentry p should be dropped instead of dentry
ret, otherwise when p is assinged to ret we end up with no lock on p and
a lost lock on ret, which leads to a deadlock.

Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

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