Messages in this thread | | | Date | Thu, 10 Jun 2010 13:31:07 +0200 | From | Tejun Heo <> | Subject | Re: 2.6.35-rc2 module reference counting broken |
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Hello,
On 06/10/2010 08:34 AM, Jari Ruusu wrote: > Later in the mount system call handling the module refrence count is > incremented. But to me that looks like there is a window of opportunity for > things to go wrong. What is there to prevent module from being removed at > zero refcount?
It can be removed, in which case blkdev_get() fails and the whole open attempt fails, which is the expected behavior. Claiming block just needs access to the containing struct block_device, caring for the actual device and backing module is blkdev_get()'s job.
Thanks.
-- tejun
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