Re: [net] 34fad54c25: kernel BUG at include/linux/skbuff.h:1935!

From: Ye Xiaolong
Date: Wed Nov 16 2016 - 00:58:05 EST

On 11/16, Duyck, Alexander H wrote:
>On Wed, 2016-11-16 at 05:20 +0800, kernel test robot wrote:
>From what I can tell it looks like the size of the frame is 0x160 hex,
>or 352.  For whatever reason we are only pulling 8 bytes into the
>header which is giving us an skb->len of 352 (0x160), and a skb-
>>data_len of 344 (0x158).  When we go to pull the 14 bytes for the
>Ethernet header we end up at a skb->len of 338 (0x152) which is
>resulting in the panic.
>The question is how are we coming up with 8 instead of 14 which is the
>lowest limit supported by eth_get_headlen? My first thought was there
>is an incorrect sizeof(eth) instead of the sizeof(*eth) somewhere in
>the code but I can't find anything like that anywhere.
>Is there any way you can provide me with the net/ethernet/eth.o and
>drivers/net/ethernet/igb/igb.o files?  With that I can look over the

Is vmlinux ok for you? I've sent it to you separately.

Btw: I've also tried gcc-5 (Debian 5.4.1-2) 5.4.1 20160904, and the
result shows the same failures.