On Thu, Nov 09, 2017 at 01:36:44PM -0800, Sarah Newman wrote: > Hi, > > We had a potentially network related crash on a dom0 with Linux 4.9.39 / Xen > 4.8 and as of today I can't find any fixes in stable/linux-4.9.y, > xen/staging-4.8, or CPU microcode updates that look like a smoking gun. I > can't rule out that it's Xen related. The backtraces are: > > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 0 at net/ipv4/af_inet.c:1473 inet_gro_complete+0xbb/0xd0 >
Did you try tweaking network settings, disabling GRO for the network interface in question, and see if that changes anything? Thanks, -- Pasi > > It looks to me like in the first backtrace, this check from inet_gro_complete > failed: > > ops = rcu_dereference(inet_offloads[proto]); > > Which I'm guessing means the packet didn't have a valid layer 4 protocol > definition, or we don't have that protocol enabled. Then when attempting to > handle that failure there was a GPF, I believe by accessing invalid data in > shinfo->frag_list . "skb_release_data+0x73" is in __read_once_size, which > I think is generated by "kfree_skb: if (likely(atomic_read(&skb->users) == > 1))" . > > --Sarah _______________________________________________ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
