[bug #58026] icmpv6 packet too big: mtu incorrectly formatted using %d instead of %u?

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?58026>

                 Summary: icmpv6 packet too big: mtu incorrectly formatted
using %d instead of %u?
                 Project: GNU Networking Utilities
            Submitted by: None
            Submitted on: Mon 23 Mar 2020 08:16:45 AM UTC
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

I originally sent this to address@hidden but I noticed that you have a
tracker here, too. Sorry if this becomes a double-submission.

I just stumbled over this last friday:

root@fc60 [prod] ~ # ping6 -s 1445 rzob-router.gocept.net
PING rzob-router.gocept.net (2a02:248:101:63::1): 1445 data bytes
1240 bytes from 2a02:238:1:f030::2: Packet too big, mtu=-737869824

Looking at the code this seems to be a formatting issue where ping is using a
%d instead of %u for an unsigned 32 bit integer.

I guess nobody really does send this big MTUs so it doesn’t normally matter,
but my ISP is doing funny things today … le sigh.





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