From: Pavel Emelyanov <xemul@parallels.com>
To: Sasha Levin <sasha.levin@oracle.com>
Cc: <davem@davemloft.net>, <edumazet@google.com>,
<netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] net: unix: allow set_peek_off to fail
Date: Mon, 9 Dec 2013 11:32:46 +0400 [thread overview]
Message-ID: <52A5721E.6020709@parallels.com> (raw)
In-Reply-To: <1386455187-28597-1-git-send-email-sasha.levin@oracle.com>
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@oracle.com>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
next prev parent reply other threads:[~2013-12-09 7:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-07 22:26 [PATCH] net: unix: allow set_peek_off to fail Sasha Levin
2013-12-09 7:32 ` Pavel Emelyanov [this message]
2013-12-11 2:45 ` David Miller
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