This is a note to let you know that I've just added the patch titled
cifs: cope with negative dentries in cifs_get_root
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cifs-cope-with-negative-dentries-in-cifs_get_root.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <sta...@kernel.org> know about it.
>From 80975d21aae2136ccae1ce914a1602dc1d8b0795 Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlay...@redhat.com>
Date: Fri, 5 Aug 2011 09:02:40 -0400
Subject: cifs: cope with negative dentries in cifs_get_root
From: Jeff Layton <jlay...@redhat.com>
commit 80975d21aae2136ccae1ce914a1602dc1d8b0795 upstream.
The loop around lookup_one_len doesn't handle the case where it might
return a negative dentry, which can cause an oops on the next pass
through the loop. Check for that and break out of the loop with an
error of -ENOENT if there is one.
Fixes the panic reported here:
https://bugzilla.redhat.com/show_bug.cgi?id=727927
Reported-by: TR Bentley <h...@trarbentley.net>
Reported-by: Iain Arnell <iarn...@gmail.com>
Cc: Al Viro <v...@zeniv.linux.org.uk>
Signed-off-by: Jeff Layton <jlay...@redhat.com>
Signed-off-by: Steve French <sfre...@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>
---
fs/cifs/cifsfs.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -581,6 +581,10 @@ cifs_get_root(struct smb_vol *vol, struc
mutex_unlock(&dir->i_mutex);
dput(dentry);
dentry = child;
+ if (!dentry->d_inode) {
+ dput(dentry);
+ dentry = ERR_PTR(-ENOENT);
+ }
} while (!IS_ERR(dentry));
_FreeXid(xid);
kfree(full_path);
Patches currently in stable-queue which might be from jlay...@redhat.com are
queue-3.0/cifs-cope-with-negative-dentries-in-cifs_get_root.patch
queue-3.0/cifs-convert-prefixpath-delimiters-in.patch
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