Hi Parav, commit fe2caefcdf ("RDMA/ocrdma: Add driver for Emulex OneConnect IBoE RDMA adapter") triggers the below kernel BUG for the attached config. [ 280.861196] kernel BUG at /c/kernel-tests/src/stable/include/linux/if_vlan.h:113! [ 280.861196] invalid opcode: 0000 [#1] PREEMPT [ 280.861196] CPU 0 [ 280.861196] Pid: 304, comm: ip Not tainted 3.6.0-rc1 #1 Bochs Bochs [ 280.861196] RIP: 0010:[] [] ocrdma_inet6addr_event+0x4/0x6 [ 280.861196] RSP: 0018:ffff8800066a1548 EFLAGS: 00000202 [ 280.861196] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00000000ffffffff [ 280.861196] RDX: ffff880006b6b400 RSI: 0000000000000001 RDI: ffffffff8207ecc0 [ 280.861196] RBP: ffff8800066a1548 R08: 0000000000000000 R09: ffffffff8109b657 [ 280.861196] R10: ffffffff00000000 R11: ffffffff81e0f318 R12: 00000000ffffffff [ 280.861196] R13: ffffffff8207ecc0 R14: 0000000000000000 R15: 0000000000000000 [ 280.861196] FS: 00007f025c12f700(0000) GS:ffffffff81dfb000(0000) knlGS:0000000000000000 [ 280.861196] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 280.861196] CR2: 00007fe4e1d30000 CR3: 0000000006b65000 CR4: 00000000000006b0 [ 280.861196] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 280.861196] DR3: 0000000000000000 DR6: 0000000000000000 DR7: 0000000000000000 [ 280.861196] Process ip (pid: 304, threadinfo ffff8800066a0000, task ffff880006a7c2c0) [ 280.861196] Stack: [ 280.861196] ffff8800066a1598 ffffffff8109b5a2 ffff880006b6b400 0000000000000001 [ 280.861196] ffff8800066a1598 0000000000000001 ffff880006b6b400 00000000ffffffff [ 280.861196] 0000000000000000 ffffffff820ad9b0 ffff8800066a15f8 ffffffff8109b6b7 [ 280.861196] Call Trace: [ 280.861196] [] notifier_call_chain+0x60/0x90 [ 280.861196] [] __atomic_notifier_call_chain+0x60/0x92 [ 280.861196] [] ? atomic_notifier_chain_unregister+0x46/0x46 [ 280.861196] [] atomic_notifier_call_chain+0xf/0x11 [ 280.861196] [] ipv6_add_addr+0x333/0x388 [ 280.861196] [] ? ipv6_add_addr+0x55/0x388 [ 280.861196] [] add_addr+0x12/0x5c [ 280.861196] [] init_loopback+0x7b/0x7f [ 280.861196] [] addrconf_notify+0x178/0x2d4 [ 280.861196] [] notifier_call_chain+0x60/0x90 [ 280.861196] [] __raw_notifier_call_chain+0x9/0xb [ 280.861196] [] raw_notifier_call_chain+0xf/0x11 [ 280.861196] [] call_netdevice_notifiers+0x45/0x4a [ 280.861196] [] __dev_notify_flags+0x32/0x56 [ 280.861196] [] dev_change_flags+0x43/0x4e [ 280.861196] [] do_setlink+0x2da/0x7f6 [ 280.861196] [] ? native_sched_clock+0x38/0x68 [ 280.861196] [] ? sched_clock+0x9/0xd [ 280.861196] [] ? sched_clock_local.constprop.2+0xd/0x78 [ 280.861196] [] ? sched_clock_cpu+0x7b/0x89 [ 280.861196] [] rtnl_newlink+0x264/0x438 [ 280.861196] [] ? rtnl_newlink+0xba/0x438 [ 280.861196] [] ? avc_has_perm_noaudit+0xd1/0xe3 [ 280.861196] [] ? avc_has_perm_noaudit+0x22/0xe3 [ 280.861196] [] rtnetlink_rcv_msg+0x22c/0x23b [ 280.861196] [] ? rtnl_lock+0x12/0x14 [ 280.861196] [] ? __rtnl_unlock+0x12/0x12 [ 280.861196] [] netlink_rcv_skb+0x3d/0x8a [ 280.861196] [] rtnetlink_rcv+0x21/0x28 [ 280.861196] [] netlink_unicast+0x12c/0x1b8 [ 280.861196] [] netlink_sendmsg+0x212/0x29a [ 280.861196] [] sock_sendmsg+0x9e/0xbf [ 280.861196] [] __sys_sendmsg+0x248/0x2d5 [ 280.861196] [] ? _raw_spin_unlock_irq+0x34/0x50 [ 280.861196] [] ? finish_task_switch.constprop.48+0x72/0xd9 [ 280.861196] [] ? finish_task_switch.constprop.48+0x34/0xd9 [ 280.861196] [] ? __schedule+0x501/0x607 [ 280.861196] [] ? put_lock_stats.isra.17+0xe/0x28 [ 280.861196] [] ? lock_release_holdtime+0xcd/0xd5 [ 280.861196] [] sys_sendmsg+0x3d/0x5e [ 280.861196] [] system_call_fastpath+0x16/0x1b [ 280.861196] Code: 00 00 ad de 48 89 93 a8 0b 00 00 e8 c9 2f 2e 00 48 8d bb b0 0b 00 00 48 c7 c6 86 f0 6d 81 e8 b0 b2 9e ff 59 5b 5d c3 55 48 89 e5 <0f> 0b 55 48 89 e5 41 54 53 48 89 fb 48 8b bf a0 fc ff ff 4c 8d [ 280.861196] RIP [] ocrdma_inet6addr_event+0x4/0x6 [ 280.861196] RSP Thanks, Fengguang