kernel updated, pkt-gen cause kernel panic about netmap HOT 4 OPEN

Can you please share the pkt-gen command you used?

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Can you please share the pkt-gen command you used?

i just use the demo parameters:
pkt-gen -i eth0 -f tx -l 60

actually, when this command is entered, it halted after print
337.846397 main [3036] interface is eth0
337.846456 main [3159] using default burst size: 512
337.846516 main [3167] running on 1 cpus (have 16)
337.846854 extract_ip_range [477] range is 10.0.0.1:1234 to 10.0.0.1:1234
337.846865 extract_ip_range [477] range is 10.1.0.1:1234 to 10.1.0.1:1234

system is still responsing... i got the kernel dump via dmesg command.

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Do we have an estimated time frame for when the issue with the detected buffer overflow in strcpy will be addressed?

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I am seeing the same fortify panic for a strcpy() overflow on Ubuntu 22.04.3 kernel version 6.5.0-14-generic using netmap 5bb6334. I have other systems running kernel version 5.15.0-91-generic and using netmap without issue. In both cases I am using the generic/emulated adapter driver. I believe the issue must be the only strcpy() call in tc_configure():

strcpy(((void *)attr_kind) + NLA_HDRLEN, qdisc_name);

I configured an interface for single-queue with ethtool -L enp33s0f0np0 combined 1 then ran pkt-gen -f tx -i enp33s0f0np0 and saw the buffer overflow. tc_configure() was passed qdisc_name=netmapemu.

Then I configured the interface for 2 queues ethtool -L enp33s0f0np0 combined 2, ran pkt-gen again and saw the same overflow. This time tc_configure() was passed qdisc_name=mq.

While looking for strcpy() in netmap_linux.c I found one other use in netmap_sink_init() I don't understand.

    strlcpy(netdev->name, "nmsink", sizeof(netdev->name)); 
    netdev->features = NETIF_F_HIGHDMA;
    strcpy(netdev->name, "nmsink%d");

Why do the strlcpy() followed by a strcpy()? Is %d desired to be part of the name or was it supposed to be used with snprintf()? I don't think it's involved in this overflow but it jumped out to me.

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