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SubjectRe: [PATCH] net: unix: allow set_peek_off to fail
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From: Pavel Emelyanov <xemul@parallels.com>
Date: Mon, 9 Dec 2013 11:32:46 +0400

> 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>

Applied and queued up for -stable, thanks.


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