linux-kernel - 2.6.24-rc4: mount.ntfs-3g hangs when smack is enabled

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Date:	Thu, 29 May 2008 13:14:01 -0300
From:	"Luiz Fernando N. Capitulino" <lcapitulino@...driva.com.br>
To:	casey@...aufler-ca.com
Cc:	miklos@...redi.hu, linux-kernel@...r.kernel.org
Subject: 2.6.24-rc4: mount.ntfs-3g hangs when smack is enabled

 Hi Casey,

 I'm not sure whether this is a smack problem, but Mandriva users are
reporting that mount.ntfs-3g (ntfs driver, uses FUSE) hangs when
they try to mount their NTFS partition.

 I could reproduce the problem with a vanilla 2.6.24-rc4 kernel, and it
only happens when Smack is enabled.

 Besides that, I've been told that a similar problem happens with unionfs,
but I haven't tried to reproduce it yet.

 What follows is the output of SysRq+D:

"""
Showing all locks held in the system:
1 lock held by mingetty/4193:
 #0:  (&tty->atomic_read_lock){--..}, at: [<c0229650>] read_chan+0x1e5/0x605
1 lock held by mingetty/4194:
 #0:  (&tty->atomic_read_lock){--..}, at: [<c0229650>] read_chan+0x1e5/0x605
1 lock held by mingetty/4195:
 #0:  (&tty->atomic_read_lock){--..}, at: [<c0229650>] read_chan+0x1e5/0x605
1 lock held by mingetty/4196:
 #0:  (&tty->atomic_read_lock){--..}, at: [<c0229650>] read_chan+0x1e5/0x605
1 lock held by mingetty/4197:
 #0:  (&tty->atomic_read_lock){--..}, at: [<c0229650>] read_chan+0x1e5/0x605
2 locks held by mount.ntfs-3g/4667:
 #0:  (&type->s_umount_key#19){--..}, at: [<c01726f0>] sget+0x202/0x350
 #1:  (&isp->smk_lock){--..}, at: [<c01c7f87>] smack_d_instantiate+0x39/0x129
1 lock held by bash/4844:
 #0:  (&tty->atomic_read_lock){--..}, at: [<c0229650>] read_chan+0x1e5/0x605
1 lock held by bash/5389:
 #0:  (&tty->atomic_read_lock){--..}, at: [<c0229650>] read_chan+0x1e5/0x605
1 lock held by bash/5498:
 #0:  (&tty->atomic_read_lock){--..}, at: [<c0229650>] read_chan+0x1e5/0x605
"""

 Let me know if you need more information.

 Best regards.

-- 
Luiz Fernando N. Capitulino
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