Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13348
akpm: the reporter disappeared, so I typed it in again.
It is not possible to make clone of tagged VLAN interface to be used as
mac-based vlan interfave.
How reproducible:
Use any 802.1q tagged vlan interface, e.g. eth2.700 and clone it:
ip link add link eth2.700 address 00:04:75:cb:38:09 macvlan0 type macvlan
ip link set dev macvlan0 up
ip addr add 10.195.1.1/24 dev macvlan0
So far, so good. Now try to ping anything via macvlan0:
ping 10.195.1.2
Actual results:
For every attempted packet tx kernel writes to console:
------------[ cut here ]------------
WARNING: at net/8021q/vlan_dev.c:254 vlan_dev_hard_header+0x36/0x126 [8021q]()
Hardware name: M22ES
Modules linked in: arptable_filter arp_tables bridge veth macvlan arc4 ecb
ppp_mppe ppp_async crc_ccitt ppp_generic slhc autofs4 sunrpc 8021q garp stp
ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack xt_tcpudp
x_tables dm_mirror dm_region_hash dm_log dm_multipath dm_mod sbs sbshc lp
floppy snd_intel8x0 joydev snd_seq_dummy snd_intel8x0m snd_ac97_codec
ide_cd_mod ac97_bus snd_seq_oss cdrom snd_seq_midi_event serio_raw snd_seq
snd_seq_device snd_pcm_oss snd_mixer_oss parport_pc snd_pcm parport battery
8139cp snd_timer i2c_sis96x ac button snd rtc_cmos rtc_core 8139too soundcore
rtc_lib mii i2c_core pcspkr snd_page_alloc pata_sis libata sd_mod scsi_mod ext3
jbd ehci_hcd ohci_hcd uhci_hcd [last unloaded: ip_tables]
Pid: 0, comm: swapper Tainted: G W 2.6.29.3 #1
Call Trace:
[<c0425f48>] warn_slowpath+0x60/0x9f
[<c0425f6f>] warn_slowpath+0x87/0x9f
[<dffb850d>] vlan_dev_hard_header+0x0/0x126 [8021q]
[<dffb8543>] vlan_dev_hard_header+0x36/0x126 [8021q]
[<dffb850d>] vlan_dev_hard_header+0x0/0x126 [8021q]
[<df83155d>] macvlan_hard_header+0x3c/0x47 [macvlan]
[<df831521>] macvlan_hard_header+0x0/0x47 [macvlan]
[<c062bf3f>] arp_create+0xef/0x1ff
[<c062c08c>] arp_send+0x3d/0x54
[<c062c916>] arp_solicit+0x16c/0x177
[<c05fadd2>] neigh_timer_handler+0x227/0x269
[<c05fabab>] neigh_timer_handler+0x0/0x269
[<c042ce4d>] run_timer_softirq+0xf0/0x141
[<c0429e5a>] __do_softirq+0x76/0xf8
[<c0429de4>] __do_softirq+0x0/0xf8
<IRQ> [<c044fb67>] handle_level_irq+0x0/0xad
[<c0429db7>] irq_exit+0x35/0x62
[<c04046bb>] do_IRQ+0xdf/0xf4
[<c04035a7>] common_interrupt+0x27/0x2c
[<c04079c5>] default_idle+0x2a/0x3d
[<c0401bb6>] cpu_idle+0x57/0x70
Macvlan driver always uses standard ethernet header length for all types
of interface to which it is linked. This patch fixes this problem.
Reported-by: <sg.tweak@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
ef5c89967d