Re: [PATCH] target: Add link_magic for fabric allow_link destination target_items

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On Mon, Feb 04, 2013 at 04:49:24PM -0800, Andy Grover wrote:
> On 12/04/2012 11:50 PM, Nicholas A. Bellinger wrote:
> >From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
> >
> >This patch adds [dev,lun]_link_magic value assignment + checks within generic
> >target_fabric_port_link() and target_fabric_mappedlun_link() code to ensure
> >destination config_item *target_item sent from configfs_symlink() ->
> >config_item_operations->allow_link() is the underlying se_device->dev_group
> >and se_lun->lun_group that we expect to symlink.
> 
> Regression. Attempting to add a storage object to a target results
> in user process (targetcli) segfaulting.
> 
> This occurs when trying to create a the symlink from:
> /sys/kernel/config/target/core/rd_mcp_0/foo
> 
> to:
> /sys/kernel/config/target/loopback/naa.5001405e26e34ae4/tpgt_1/lun/lun_0/c180cd96bf
> 
> with the last bit being randomly generated by targetcli, as it has
> always done afaict.
> 
> This is in stable 3.7.4, CCing stable@.

Andy, this should be fixed in 3.7.6, can you check that kernel to verify
this?

thanks,

greg k-h
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