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SubjectRe: Linux 2.2.7-ac1 Path MTU bug
Date
In muc.lists.linux-kernel, you wrote:
>
>Hi,
>
>I think I have found a Path MTU Discovery bug in Linux-2.2.7-ac1.
>
>1. Linux sends a packet > PMTU
>2. "ICMP Host Unreachable - need to frag" received
>3. PMTU-sized packet is sent
>4. data which comes after the packet from 1. is sent in PMTU-sized
> packets.
>
>The problem is that the data remaining in the packet 1. which comes after
>the PMTU length is never resent. So the TCP connection stalls at this point.
>See the tcpdump example below (bytes 1510-1582 are not sent).
>
>Sometimes the PMTU mechanism does work OK. The bug is easily reproducable.
>The problem is not Ultrix related: it happens with HP-UX & Linux too.
>I did not try a normal (non -ac) 2.2.7 kernel.

I cannot reproduce it here. What compiler do you use?

-Andi

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