Re: [ofa-general] list corruption on ib_srp load in v2.6.24-rc5

From: Roland Dreier
Date: Fri Dec 21 2007 - 17:21:21 EST


> I'm getting the following oops when doing the following commands:
>
> modprobe ib_srp
> <add targets(s) to ib_srp using sysfs>
> rmmod ib_srp
> modprobe ib_srp
> <OOPS>
>
> I'm going to try and track down how the list is getting corrupted; it
> looks like attribute_container_list in
> drivers/base/attribute_container.c is the one getting corrupted.
>
> Before I get too far into this, has anyone seen this one before? I
> looked at 'git diff v2.6.24-rc4..' and didn't see any changes that would
> stand out as fixing it.

I haven't seen this, but I actually haven't done much srp testing with
post-2.6.23 kernels. From a quick skim through the code, I would
guess that one of the calls to transport_container_unregister() in
srp_release_transport() (which is called one module unload) is
failing and leaving something bogus on the attribute_container_list.

This could because the underlying call to attribute_container_unregister()
fails because the k_list is not empty. I don't know if this is some
sort of leak in the ib_srp driver, or something broken elsewhere...

- R.
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