Re: [PATCH 2/2] livepatch: fix patched module loading race

[Josh Poimboeuf]

On Wed, Mar 04, 2015 at 11:02:59PM +0100, Jiri Kosina wrote:
> On Wed, 4 Mar 2015, Josh Poimboeuf wrote:
> 
> > Well, we could just get a reference on all patched modules to prevent them
> > from being unloaded.
> 
> Is that really a solution for cases where you are unloading a module (it 
> has "just" been switched to MODULE_STATE_GOING) and enable a patch which 
> patches one of its functions directly after it got switched to 
> MODULE_STATE_GOING?

Ah, right.  try_module_get() fails, we don't patch the module, and we
end up in the same mod->exit() race.  Never mind, again :-)

-- 
Josh
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