On Tue, 6 Mar 2007, Herbert Xu wrote:
> It's just too error-prone to rely on it to not have MSG_TRUNC set.
Agreed.
> I'm going to clean this up for UDP and improve the UDP-lite checksum
> handling while I'm at it.
Great. It'll be good to get this years-old UDP bug fixed.
Thanks,
Jim
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On Tue, 6 Mar 2007, Herbert Xu wrote:
> msg_flags [...] its initial value is not used.
That's not true. Please see my post.
Specifically, at linux-2.6.20.1/net/ipv4/udp.c:843, it seems that
udp_recvmsg() can randomly ignore whether the HW has computed a checksum
and compute it in SW redundantl
After inspection of some networking code, it seems there is a use of
uninitialized data in udp_recvmsg(),
linux-2.6.20.1/net/ipv4/udp.c:843, while testing msg->msg_flags (see
the backtrace below). It looks like sys_recvfrom() is not
initializing msg.msg_flags and, along the path given below, msg_f
