fs: WARNING: at fs/dcache.c:2587 prepend_path

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Hi all,

While fuzzing with trinity inside a KVM tools guest running latest -next,
I've started seeing a bunch of these, which wasn't there in the -next from
couple of days ago:

[ 1169.020539] ------------[ cut here ]------------
[ 1169.021297] WARNING: at fs/dcache.c:2587 prepend_path+0x188/0x1f0()
[ 1169.022903] Root dentry has weird name <dev/zero>
[ 1169.023967] Modules linked in:
[ 1169.024479] Pid: 28818, comm: trinity Tainted: G        W    3.8.0-next-20130225-sasha-00042-g8547837 #997
[ 1169.026771] Call Trace:
[ 1169.027527]  [<ffffffff8110cd1c>] warn_slowpath_common+0x8c/0xc0
[ 1169.028442]  [<ffffffff8110cdf1>] warn_slowpath_fmt+0x41/0x50
[ 1169.029829]  [<ffffffff81147a10>] ? lg_local_lock+0x70/0x80
[ 1169.031038]  [<ffffffff8129e0da>] ? prepend_path+0x3a/0x1f0
[ 1169.032783]  [<ffffffff8129e228>] prepend_path+0x188/0x1f0
[ 1169.034083]  [<ffffffff8129f0e1>] d_path+0x101/0x140
[ 1169.034946]  [<ffffffff812ad5ae>] seq_path+0x5e/0xd0
[ 1169.035804]  [<ffffffff812f7494>] show_map_vma+0x174/0x2b0
[ 1169.037065]  [<ffffffff812f75fa>] show_map+0x2a/0x60
[ 1169.037790]  [<ffffffff812f764e>] show_pid_map+0xe/0x10
[ 1169.038902]  [<ffffffff812adf31>] seq_read+0x311/0x430
[ 1169.039944]  [<ffffffff81287e23>] vfs_read+0xb3/0x120
[ 1169.040934]  [<ffffffff8118554d>] ? trace_hardirqs_on+0xd/0x10
[ 1169.042842]  [<ffffffff812885dd>] sys_read+0x5d/0xa0
[ 1169.043696]  [<ffffffff84025290>] tracesys+0xdd/0xe2
[ 1169.045019] ---[ end trace 6e68f4c39bb079ca ]---


Thanks,
Sasha

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