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-   -   dlm: check the maximum size of a request from user (http://www.linux-archive.org/cluster-development/702358-dlm-check-maximum-size-request-user.html)

David Teigland 09-10-2012 03:43 PM

dlm: check the maximum size of a request from user
 
On Sun, Sep 09, 2012 at 04:16:58PM +0200, Sasha Levin wrote:
> device_write only checks whether the request size is big enough, but it doesn't
> check if the size is too big.
>
> At that point, it also tries to allocate as much memory as the user has requested
> even if it's too much. This can lead to OOM killer kicking in, or memory corruption
> if (count + 1) overflows.

thanks, pushed to next


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