Re: [PATCH] net: unix: allow set_peek_off to fail

[Pavel Emelyanov]

On 12/08/2013 02:26 AM, Sasha Levin wrote:
> unix_dgram_recvmsg() will hold the readlock of the socket until recv
> is complete.
> 
> In the same time, we may try to setsockopt(SO_PEEK_OFF) which will hang until
> unix_dgram_recvmsg() will complete (which can take a while) without allowing
> us to break out of it, triggering a hung task spew.
> 
> Instead, allow set_peek_off to fail, this way userspace will not hang.
> 
> Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>

Acked-by: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
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