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SubjectRe: Linux 2.6.26-rc4
On Tue, Jun 03, 2008 at 12:13:54PM +0200, Miklos Szeredi wrote:
>
> http://www.kerneloops.org/raw.php?rawid=12419&msgid=
>
> Looks like a negative inode in S_ISDIR(mnt->mnt_root->d_inode->i_mode),
> which would be due to NFS not properly filling in its root dentry?

Look more carefully. It's path->dentry; aside of the fact that dentry
pointer is fetched at offset 8 from one of the arguments (fits path->dentry,
too low for mnt->mnt_root), do_add_mount() itself has just done S_ISLNK
on the very same thing, so it'd die before getting to graft_tree().

No, it's either path_lookup() somehow returning a negative dentry in
do_mount() (which shouldn't be possible, unless it's some crap around
return_reval in __link_path_walk()) or it's follow_down() giving us
a negative dentry. Which almost certainly would've exploded prior to
that...


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