[FS#2628] Kernel warning / crash on ramips: eth0 (mtk_soc_eth): transmit queue 0 timed out

OpenWrt Bugs openwrt-bugs at lists.openwrt.org
Tue Feb 9 03:30:53 EST 2021


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FS#2628 - Kernel warning / crash on ramips: eth0 (mtk_soc_eth): transmit queue 0 timed out
User who did this - mrakotiq (mrakotiq)

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I'm currently in time press, so only briefly

Later I reliably reproduced the problem by sending a UDP packet with:
dd if=/dev/urandom bs=4k |nc -u 10.19.19.194 888
And replayig pcap through router from my workstation (eth1: RTL8168evl/8111evl, gso,tso off ) with command:
tcpreplay-edit -l 50 -F pad  --enet-dmac=74:ac:b9:a2:5a:5a,74:ac:b9:a2:5a:5a -i eth1  ./linuxbox.pcap 


Pcap was captured in real network where he caused this error. Because it may contain sensitive data, I will send it to you by email.
By this procedure I was able to reproduce the error every time tcpreplay was run.



//For udp stream it is necessary to pay attention so that an icmp packet does not return from somewhere, which could stop the flow. And verify that the packets  from tcpreplay are actually passing through the router //


BTW: When I have time, I will try to reproduce this with the current build.
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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=2628#comment9346

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