lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Mon, 29 Oct 2018 13:30:49 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     daniel@...earbox.net, ast@...nel.org
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH] bpf: tcp_bpf_recvmsg should return EAGAIN when
 nonblocking and no data

On 10/29/2018 12:31 PM, John Fastabend wrote:
> We return 0 in the case of a nonblocking socket that has no data
> available. However, this is incorrect and may confuse applications.
> After this patch we do the correct thing and return the error
> EAGAIN.
> 
> Quoting return codes from recvmsg manpage,
> 
> EAGAIN or EWOULDBLOCK
>  The socket is marked nonblocking and the receive operation would
>  block, or a receive timeout had been set and the timeout expired
>  before data was received.
> 
> Signed-off-by: John Fastabend <john.fastabend@...il.com>
> ---

Add fixes tag.

Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface")




Powered by blists - more mailing lists