Re: Local DoS on single_open?

[viro]

On Thu, Sep 11, 2003 at 02:42:13PM +1000, Keith Owens wrote:
> single_open() requires the kernel to kmalloc a buffer which lives until
> the userspace caller closes the file.  What prevents a malicious user
> opening the same /proc entry multiple times, allocating lots of kmalloc
> space and causing a local DoS?

Size of that buffer is limited.  IOW, it's not different from opening
e.g. a shitload of pipes or sockets.
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