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Message-ID: <20131116231615.GA24327@marquez.int.rhx>
Date: Sat, 16 Nov 2013 23:16:15 +0000
From: Michele Baldessari <michele@...syn.org>
To: netdev@...r.kernel.org
Cc: Hannes Frederic Sowa <hannes@...essinduktion.org>
Subject: oops in pskb_expand_head - 3.11.6
Hi all,
Two oops like the following were reported in Fedora 19 - kernel 3.11.6:
https://bugzilla.redhat.com/show_bug.cgi?id=1015905
Seems ipv6/netfilter related (?), could not find any obvious commit that
fixed it in later versions.
Environment description (from the BZ):
When a local client attempts to send an IPv6 packet larger than the MTU,
the kernel on the router panics. In normal operation this shouldn't
happen but a simple 'ping6 -s 1490 www.google.com' from a client will
trigger the panic.
If you try this from the router itself, you get 'Packet too big:
mtu=1472' but no panic suggesting this is a 'forward' issue.
How reproducible:
'ping6 -s 1490 www.google.com' from a client will reproduce every time.
Steps to Reproduce:
1. Set up a pppoe connection
2. Set up a 6rd SIT tunnel over the pppoe connection
3. Set up infrastructure to distribute delegated IPv6 addresses
4. From a client run 'ping6 -s 1490 www.google.com'
enp1s0 = lan
enp2s0 = wan
ppp0 = pppoe via enp2s0
rdhe0 = sit via ppp0
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:22:4d:9a:5d:9d brd ff:ff:ff:ff:ff:ff
inet 192.168.101.254/24 brd 192.168.101.255 scope global enp2s0 valid_lft forever preferred_lft forever
inet6 fe80::222:4dff:fe9a:5d9d/64 scope link valid_lft forever preferred_lft forever
3: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:22:4d:9a:5d:a1 brd ff:ff:ff:ff:ff:ff
inet 192.168.147.1/24 brd 192.168.147.255 scope global enp1s0 valid_lft forever preferred_lft forever
inet6 2001:XXXX:XXXX:13d:2::1/128 scope global valid_lft forever preferred_lft forever
inet6 fe80::222:4dff:fe9a:5da1/64 scope link valid_lft forever preferred_lft forever
4: sit0: <NOARP> mtu 1480 qdisc noop state DOWN
link/sit 0.0.0.0 brd 0.0.0.0
5: rdhe0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1460 qdisc noqueue state UNKNOWN
link/sit 65.XXX.XXX.14 peer 184.105.250.46 inet6 2001:XXXX:XXXX:13d::2/64 scope global valid_lft forever preferred_lft forever
inet6 fe80::4166:d30e/128 scope link valid_lft forever preferred_lft forever
6: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1492 qdisc pfifo_fast state UNKNOWN qlen 3
link/ppp inet 65.XXX.XXX.14 peer 207.XXX.XXX.6/32 scope global ppp0
valid_lft forever preferred_lft forever
[ 573.858967] kernel BUG at net/core/skbuff.c:1059!
[ 573.864743] invalid opcode: 0000 [#1] SMP
[ 573.869856] Modules linked in: pppoe pppox ppp_synctty ppp_async crc_ccitt ppp_generic slhc 8021q garp stp mrp llc xt_policy xt_NFLOG
nfnetlink_log nfnetlink nf_conntrack_ipv6 nf_defrag_ipv6 ip6t_rt xt_conntrack iptable_mangle ipt_MASQUERADE iptable_nat nf_conntrack_ipv4
ip6table_filter nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_TCPMSS ip6table_mangle ip6_tables e1000e(OF) x86_pkg_temp_thermal kvm_intel
w83627ehf hwmon_vid coretemp kvm crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_intel microcode snd_hda_codec r8169 mii snd_hwdep snd_seq snd_seq_device snd_pcm iTCO_wdt iTCO_vendor_support snd_page_alloc
snd_timer snd soundcore serio_raw shpchp mei_me lpc_ich mei i2c_i801 mfd_core mperf usb_storage i915 video i2c_algo_bit drm_kms_helper drm
ata_generic i2c_core pata_acpi
[ 573.906875] CPU: 3 PID: 0 Comm: swapper/3 Tainted: GF O 3.11.6-200.fc19.x86_64 #1
[ 573.909619] Hardware name: /DQ67EP, BIOS SWQ6710H.86A.0066.2012.1105.1504 11/05/2012
[ 573.911658] task: ffff880138305b80 ti: ffff880138334000 task.ti: ffff880138334000
[ 573.913273] RIP: 0010:[<ffffffff8153def0>] [<ffffffff8153def0>] pskb_expand_head+0x260/0x2a0
[ 573.915167] RSP: 0018:ffff88013e3836a8 EFLAGS: 00010202
[ 573.916318] RAX: 0000000000000003 RBX: ffff8800376d2900 RCX: 0000000000000020
[ 573.917930] RDX: 000000000000069e RSI: 0000000000000000 RDI: ffff8800376d2900
[ 573.919444] RBP: ffff88013e3836d8 R08: 00000000000000c0 R09: ffff88013667ca00
[ 573.920965] R10: 000000000000ffff R11: 0000000000000002 R12: ffff88013838f000
[ 573.922577] R13: 0000000000000000 R14: ffff88013838f000 R15: ffff8800376d2900
[ 573.924103] FS: 0000000000000000(0000) GS:ffff88013e380000(0000) knlGS:0000000000000000
[ 573.925840] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 573.927519] CR2: 00007fb14b067000 CR3: 0000000135a93000 CR4: 00000000000407e0
[ 573.929034] Stack:
[ 573.929519] ffff8800376d2900 ffff8800376d2900 ffff88013838f000 00000000000005a0
[ 573.931323] ffff88013838f000 ffff8800376d2900 ffff88013e383720 ffffffff8153e290
[ 573.933202] ffff88013838f000 000005a035de089c 0000000000000000 ffff88013838f000
[ 573.935001] Call Trace:
[ 573.935570] <IRQ>
[ 573.936008] [<ffffffff8153e290>] __pskb_pull_tail+0x50/0x360
[ 573.937459] [<ffffffff8154d5bc>] dev_hard_start_xmit+0x2cc/0x560
[ 573.938772] [<ffffffff8156b3b0>] sch_direct_xmit+0xe0/0x1c0
[ 573.939995] [<ffffffff8154da49>] dev_queue_xmit+0x1f9/0x480
[ 573.941218] [<ffffffff81553af1>] neigh_direct_output+0x11/0x20
[ 573.942587] [<ffffffff815f2a58>] ip6_finish_output2+0x168/0x4b0
[ 573.943880] [<ffffffff815f51bd>] ip6_fragment+0x77d/0xa60
[ 573.945065] [<ffffffff815f28f0>] ? ip6_xmit+0x400/0x400
[ 573.946229] [<ffffffff815f5521>] ip6_finish_output+0x81/0xc0
[ 573.947905] [<ffffffff815f559e>] ip6_output+0x3e/0xb0
[ 573.949042] [<ffffffff815f44da>] ip6_forward+0x29a/0x800
[ 573.950212] [<ffffffff81601ba4>] ? ip6_route_input+0xa4/0xd0
[ 573.951497] [<ffffffff815f5610>] ? ip6_output+0xb0/0xb0
[ 573.952653] [<ffffffff815f5690>] ip6_rcv_finish+0x80/0x90
[ 573.953844] [<ffffffffa03c386e>] __ipv6_conntrack_in+0xce/0x1a0 [nf_conntrack_ipv6]
[ 573.955520] [<ffffffffa03c39c7>] ipv6_conntrack_in+0x27/0x30 [nf_conntrack_ipv6]
[ 573.957218] [<ffffffff8157a1bb>] nf_iterate+0x8b/0xa0
[ 573.958335] [<ffffffff815f5610>] ? ip6_output+0xb0/0xb0
[ 573.959488] [<ffffffff8157a244>] nf_hook_slow+0x74/0x130
[ 573.960653] [<ffffffff815f5610>] ? ip6_output+0xb0/0xb0
[ 573.961898] [<ffffffffa03ba203>] nf_ct_frag6_output+0xe3/0x100 [nf_defrag_ipv6]
[ 573.963497] [<ffffffff815f5610>] ? ip6_output+0xb0/0xb0
[ 573.964646] [<ffffffffa03b90ca>] ipv6_defrag+0xba/0x100 [nf_defrag_ipv6]
[ 573.966099] [<ffffffff815f5610>] ? ip6_output+0xb0/0xb0
[ 573.967716] [<ffffffff8157a1bb>] nf_iterate+0x8b/0xa0
[ 573.968834] [<ffffffff815f5610>] ? ip6_output+0xb0/0xb0
[ 573.969984] [<ffffffff8157a244>] nf_hook_slow+0x74/0x130
[ 573.971155] [<ffffffff815f5610>] ? ip6_output+0xb0/0xb0
[ 573.972411] [<ffffffff815f5e18>] ipv6_rcv+0x348/0x440
[ 573.973529] [<ffffffff8154b8e6>] __netif_receive_skb_core+0x646/0x820
[ 573.974928] [<ffffffff81019900>] ? flush_ptrace_hw_breakpoint+0x10/0x60
[ 573.976362] [<ffffffff8154bad8>] __netif_receive_skb+0x18/0x60
[ 573.977703] [<ffffffff8154bb53>] netif_receive_skb+0x33/0xa0
[ 573.978939] [<ffffffff8154c520>] napi_gro_receive+0x80/0xb0
[ 573.980166] [<ffffffffa032241f>] e1000_receive_skb+0x7f/0xe0 [e1000e]
[ 573.981645] [<ffffffffa03249ff>] e1000_clean_rx_irq_ps+0x4af/0x780 [e1000e]
[ 573.983149] [<ffffffffa032cd3d>] e1000e_poll+0x6d/0x310 [e1000e]
[ 573.984460] [<ffffffff813daf0c>] ? add_interrupt_randomness+0x15c/0x190
[ 573.985891] [<ffffffff8154beb9>] net_rx_action+0x149/0x240
[ 573.987550] [<ffffffff8106c427>] __do_softirq+0xf7/0x240
[ 573.988721] [<ffffffff8165875c>] call_softirq+0x1c/0x30
[ 573.989873] [<ffffffff81014695>] do_softirq+0x55/0x90
[ 573.990990] [<ffffffff8106c705>] irq_exit+0xb5/0xc0
[ 573.992241] [<ffffffff81659056>] do_IRQ+0x56/0xc0
[ 573.993295] [<ffffffff8164e9ed>] common_interrupt+0x6d/0x6d
[ 573.994517] <EOI>
[ 573.994954] [<ffffffff815004df>] ? cpuidle_enter_state+0x4f/0xc0
[ 573.996471] [<ffffffff81500619>] cpuidle_idle_call+0xc9/0x210
[ 573.997727] [<ffffffff8101b60e>] arch_cpu_idle+0xe/0x30
[ 573.998875] [<ffffffff810b663e>] cpu_startup_entry+0xce/0x280
[ 574.000131] [<ffffffff8103ed67>] start_secondary+0x217/0x2c0
[ 574.001370] Code: 44 00 00 be 9e 01 00 00 48 c7 c7 f9 ab 9e 81 89 55
d0 e8 44 93 b2 ff 8b 55 d0 e9 7b ff ff ff 41 81 cf 00 20 00 00 e9 f1 fd
ff ff <0f> 0b 0f 0b 44 89 fe 48 89 df e8 d1 f8 ff ff 85 c0 74 12 4c 89
[ 574.008632] RIP [<ffffffff8153def0>] pskb_expand_head+0x260/0x2a0
[ 574.010382] RSP <ffff88013e3836a8>
[ 574.011174] ---[ end trace 3d6846dc38a4d9c7 ]---
[ 574.012433] Kernel panic - not syncing: Fatal exception in interrupt
--
Michele Baldessari <michele@...syn.org>
C2A5 9DA3 9961 4FFB E01B D0BC DDD4 DCCB 7515 5C6D
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