Messages in this thread | | | Date | Wed, 18 May 2011 15:36:36 +0100 | From | Alan Cox <> | Subject | Re: BUG: NULL pointer deref in tty port / uart |
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> have the same issue.. looks like we should not NULL the port->tty > if there's blocked open, but not sure what's exactly the logic > behind "port's block_open and count" ..
A pending open is not a user of the tty as far as the rest of the stack is concerned. I also don't see why clearing port->tty is causing this crash because nothing on that path should ever be going via port->tty and it isn't safe to do so.
> attached patch fixes it for me
But still breaks on hangup where we can't do that.
Where is port->tty getting misused to cause the crash, that is the bit I'm missing somewhere.
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