Re: Use-after-free in ata_qc_issue

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Hello,

On Sun, Sep 22, 2013 at 02:51:51PM -0700, Dmitry Vyukov wrote:
> > Yeah, could be.  IIRC, there's still race condition in block / scsi
> > timeout handling.  Hmmm...
> 
> Is there an open bug for this?

Not that I know of.  ISTR a couple threads about it.  My memory is
quite hazy as usual but IIRC there's a race window between arming the
timer and the command issue path actually becoming ready for timer
going off and I wouldn't be suprised if there are other race
conditions around timeout / exception handling path.  It kinda has
grown over time and I don't think anybody audited how the whole thing
fits and works together. :(

Thanks.

-- 
tejun
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