Re: [PATCH for-next 0/4] RDMA/hns: Introduce delay-destruction mechanism

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On Thu, Feb 20, 2025 at 11:48:49AM +0800, Junxian Huang wrote:

> Driver notifies HW about the memory release with mailbox. The procedure
> of a mailbox is:
> 	a) driver posts the mailbox to FW
> 	b) FW writes the mailbox data into HW
> 
> In this scenario, step a) will fail due to the FW reset, HW won't get
> notified and thus may lead to UAF.

That's just wrong, a FW reset must fully stop and sanitize the HW as
well. You can't have HW running rouge with no way for FW to control it
anymore.

Jason




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