On (09/16/15 07:07), David Ahern wrote: > Hi Sergey: > Hi,
sorry for long reply. Baremetal. So grabbing the backtrace is a bit complicated. But it looks very close to what Richard Alpe has posted. in IRQ RIP is at ip_route_input_noref [ 0.877597] [<ffffffff8158e13c>] arp_process+0x39c/0x690 [ 0.877597] [<ffffffff8158e57e>] arp_rcv+0x13e/0x170 -ss > Is this with KVM or baremetal? > > -----8<----- > thanks for the analysis > > >>addr2line -e vmlinux -i 0xffffffff8146c0b1 > >>net/ipv4/route.c:1815 > >>net/ipv4/route.c:1905 > >> > >> > >>which seems to be this line ip_route_input_noref()->ip_route_input_slow(): > >>... > >>1813 rth->rt_is_input = 1; > >>1814 if (res.table) > >>1815 rth->rt_table_id = res.table->tb_id; > >>1816 > >>... > >> > >> > >>added by b7503e0cdb5dbec5d201aa69d8888c14679b5ae8 > >> > >> net: Add FIB table id to rtable > >> > >> Add the FIB table id to rtable to make the information available for > >> IPv4 as it is for IPv6. > >> > >> > >> -ss > > Hi Richard: > > >I to get an Oops in ip_route_input_noref(). It happens occasionally during > >bootup. > >KVM environment using virtio driver. Let me know if you need any additional > >info or > >if you want me to try to bisect it. > > > >Starting network... > >... > >[ 0.877040] BUG: unable to handle kernel NULL pointer dereference at > >0000000000000056 > >[ 0.877597] IP: [<ffffffff8155b5e2>] ip_route_input_noref+0x1a2/0xb00 > > Can you send me your kernel config and qemu command line? KVM with virtio > networking is a primary test vehicle, and I did not encounter this at all. > > Thanks, > David > > -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html