Messages in this thread | | | Subject | Re: [PATCH net] r8152: Fix broken RX checksums. | From | Mark Lord <> | Date | Fri, 4 Nov 2016 09:50:20 -0400 |
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Yeah, the device or driver is definitely getting confused with rx_desc structures. I added code to check for unlikely rx_desc values, and it found this for starters:
rx_desc: 00480801 00480401 00480001 0048fc00 0048f800 0048f400 pkt_len=2045 rx_data: 00 f0 48 00 00 ec 48 00 00 e8 48 00 00 e4 48 00 00 e0 48 00 00 dc 48 00 00 d8 48 00 00 d4 48 00 rx_data: 00 d0 48 00 00 cc 48 00 00 c8 48 00 00 c4 48 00 00 c0 48 00 00 bc 48 00 00 b8 48 00 00 b4 48 00 rx_data: 00 b0 48 00 00 ac 48 00 00 01 00 00 81 ed 00 00 00 01 00 00 00 00 00 00 00 00 00 02 4d ac 00 00 rx_data: 10 00 ff ff ff ff 00 00 01 28 83 d6 ff 6d 00 20 25 b1 58 1b 68 ff 00 05 20 01 56 41 17 35 00 00 ...
The MTU/MRU on this link is the standard 1500 bytes, so a pkt_len of 2045 isn't valid here. And the rx_desc values look an awful lot like the rx_data values that follow it.
There's definitely more broken here than just TCP RX checksums.
-ml
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