Re: [PATCH RFC v1b] firewire: cdev: prevent kernel stack leaking into ioctl arguments

[Clemens Ladisch]

Stefan Richter wrote:
> This fix simply always null-initializes the entire ioctl argument buffer
> regardless of the actual length of expected user input.  That is, a
> runtime overhead of memset(..., 40) is added to each firewirew-cdev
> ioctl() call.

This part of the stack is most likely to be already in the cache.


Regards,
Clemens
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