[PATCH net] rxrpc: Call state should be read with READ_ONCE() under some circumstances

[Jakub Kicinski]

On Wed, 13 Jan 2021 08:23:54 +0000 David Howells wrote:
> Jakub Kicinski <kuba at kernel.org> wrote:
> 
> > On Tue, 12 Jan 2021 15:59:15 +0000 David Howells wrote:  
> > > From: Baptiste Lepers <baptiste.lepers at gmail.com>
> > > 
> > > The call state may be changed at any time by the data-ready routine in
> > > response to received packets, so if the call state is to be read and acted
> > > upon several times in a function, READ_ONCE() must be used unless the call
> > > state lock is held.
> > > 
> > > As it happens, we used READ_ONCE() to read the state a few lines above the
> > > unmarked read in rxrpc_input_data(), so use that value rather than
> > > re-reading it.
> > > 
> > > Signed-off-by: Baptiste Lepers <baptiste.lepers at gmail.com>
> > > Signed-off-by: David Howells <dhowells at redhat.com>  
> > 
> > Fixes: a158bdd3247b ("rxrpc: Fix call timeouts")
> > 
> > maybe?  
> 
> Ah, yes.  I missed there wasn't a Fixes line.  Can you add that one in, or do
> I need to resubmit the patch?

Sure, added, just checking if you didn't leave it out on purpose.

Applied, thanks!