Bug 808603

Description of problem:

The most awesome part is that it does this in the device add path, so any attempt to pull kernel network device information via netlink hangs.

[    5.243248] BUG: unable to handle kernel NULL pointer dereference at           (null)
[    5.243293] IP: [<ffffffff812c5b98>] strncpy+0x18/0x30
[    5.243324] PGD 21e4f2067 PUD 21e4f3067 PMD 0 
[    5.243356] Oops: 0000 [#1] SMP 
[    5.243380] CPU 1 
[    5.243393] Modules linked in: cnic(+) uio cxgb4i cxgb4 cxgb3i cxgb3 mdio libcxgbi ib_iser rdma_cm ib_addr 
iw_cm ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip6t_REJECT nf_conntrack
_ipv6 nf_defrag_ipv6 xt_physdev nf_conntrack_ipv4 nf_defrag_ipv4 ip6table_filter xt_state nf_conntrack ip6_tab
les snd_hda_codec_hdmi snd_hda_codec_conexant arc4 vhost_net tun macvtap macvlan kvm_intel snd_hda_intel i2400
m_usb(+) kvm snd_hda_codec iwlwifi snd_hwdep snd_pcm mac80211 snd_page_alloc i2400m snd_timer thinkpad_acpi(+)
 iTCO_wdt snd binfmt_misc wimax microcode btusb bluetooth intel_ips i2c_i801 iTCO_vendor_support cfg80211 soun
dcore e1000e wmi rfkill uinput ums_realtek usb_storage i915 video i2c_algo_bit drm_kms_helper drm i2c_core
[    5.243958] 
[    5.243969] Pid: 548, comm: modprobe Not tainted 3.3.0-8.fc17.x86_64 #1 LENOVO 5129CTO/5129CTO
[    5.244012] RIP: 0010:[<ffffffff812c5b98>]  [<ffffffff812c5b98>] strncpy+0x18/0x30
[    5.244047] RSP: 0018:ffff88021e6b1c78  EFLAGS: 00010202
[    5.244070] RAX: ffff88021e6b1cf0 RBX: ffff88021e6b1cac RCX: ffff88021e6b1cf0
[    5.244098] RDX: 000000000000001f RSI: 0000000000000000 RDI: ffff88021e6b1cf0
[    5.244126] RBP: ffff88021e6b1c78 R08: ffff88021e6b1d0f R09: 000000000000fffd
[    5.244154] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88022da1b000
[    5.244183] R13: ffff88022da1b000 R14: 0000000000000000 R15: ffff88022da1b000
[    5.244211] FS:  00007f0cef80a740(0000) GS:ffff88023bc80000(0000) knlGS:0000000000000000
[    5.244243] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[    5.244267] CR2: 0000000000000000 CR3: 000000021e4f5000 CR4: 00000000000006e0
[    5.244295] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    5.244323] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[    5.244352] Process modprobe (pid: 548, threadinfo ffff88021e6b0000, task ffff88022dbc8000)
[    5.244392] Stack:
[    5.244406]  ffff88021e6b1c98 ffffffffa0250c46 0000000000000000 ffff88021e6b1cac
[    5.244445]  ffff88021e6b1da8 ffffffffa05b571b 000000001e6b1cd8 00006d3030343269
[    5.244483]  0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    5.244522] Call Trace:
[    5.244542]  [<ffffffffa0250c46>] i2400m_get_drvinfo+0x56/0x90 [i2400m]
[    5.244572]  [<ffffffffa05b571b>] is_cnic_dev+0x7b/0x500 [cnic]
[    5.244599]  [<ffffffffa05b6bca>] cnic_netdev_event+0xca/0x340 [cnic]
[    5.244627]  [<ffffffffa05c1000>] ? 0xffffffffa05c0fff
[    5.244654]  [<ffffffff814db725>] register_netdevice_notifier+0x85/0x1c0
[    5.244682]  [<ffffffffa05c1000>] ? 0xffffffffa05c0fff
[    5.244706]  [<ffffffffa05c1028>] cnic_init+0x28/0x1000 [cnic]
[    5.244733]  [<ffffffff8100212a>] do_one_initcall+0x12a/0x180
[    5.244761]  [<ffffffff810b6136>] sys_init_module+0x1106/0x20b0
[    5.244788]  [<ffffffff815f33e9>] system_call_fastpath+0x16/0x1b
[    5.244813] Code: 84 c9 75 ef 5d c3 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 85 d2 48 89 f8 4c 8d 04 17 48 89 f9 48 89 e5 74 1a 0f 1f 44 00 00 <0f> b6 16 80 fa 01 88 11 48 83 de ff 48 83 c1 01 4c 39 c1 75 eb 
[    5.245117] RIP  [<ffffffff812c5b98>] strncpy+0x18/0x30
[    5.245143]  RSP <ffff88021e6b1c78>
[    5.245159] CR2: 0000000000000000



Version-Release number of selected component (if applicable):


How reproducible:


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Additional info: