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[Philipp Marek <philipp.marek@xxxxxxxxxx>]

4.2.0-34-generic is ... strange.

"tcpdump" works as expected:
    14412 packets captured
    14430 packets received by filter
    15 packets dropped by kernel

but "tshark" with the same options crashes the kernel:

[  137.709794] Oops: Exception in kernel mode, sig: 4 [#1]
[  137.709872] SMP NR_CPUS=2048 NUMA PowerNV
[  137.709879] Modules linked in: nfnetlink_queue nfnetlink_log nfnetlink bluetooth drbd lru_cache xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nfsv3 nfs_acl nfs lockd grace fscache binfmt_misc bridge stp llc kvm_hv uio_pdrv_genirq kvm powernv_rng uio rdma_cm iw_cm mlx5_ib ib_ipoib sunrpc ib_uverbs ib_umad ib_cm ib_sa ib_mad ib_core ib_addr autofs4 ses enclosure mlx5_core bnx2x ipr nvme mdio libcrc32c
[  137.710598] CPU: 64 PID: 0 Comm: swapper/64 Not tainted 4.2.0-34-generic #39-Ubuntu
[  137.710666] task: c000001e503de5e0 ti: c000001fffd90000 task.ti: c000001e505a8000
[  137.710735] NIP: d000000016f50000 LR: c000000000a7a6d4 CTR: d000000016f50000
[  137.710803] REGS: c000001fffd93620 TRAP: 0e40   Not tainted  (4.2.0-34-generic)
[  137.710870] MSR: 9000000000089033 <SF,HV,EE,ME,IR,DR,RI,LE>  CR: 24002888  XER: 00000000
[  137.711042] CFAR: c000000000a7a6d0 SOFTE: 1
GPR00: c000000000a7a69c c000001fffd938a0 c00000000151af00 c000000fa52fa500
GPR04: d000000016f30028 c000000fe3f55d80 c000000fdf824000 000000000000ffff
GPR08: c000000001490b00 d000000016f50000 000000000000002e d000000010f94c68
GPR12: d000000016f50000 c000000007b06000 c000000fa360acc0 c000000fdae18000
GPR16: c000000fdf824880 00000000000002b3 c000001fffd939f0 0000000000000001
GPR20: d000000013356ba0 000000000000dd86 0000000000000000 ffffffff80000000
GPR24: 0000000000000005 000000000000002e c000000fa5427910 c000000fdf824000
GPR28: 000000000000003c c000000fdf824000 c000000fe3f55800 c000000fa52fa500
[  137.711909] NIP [d000000016f50000] 0xd000000016f50000
[  137.711959] LR [c000000000a7a6d4] tpacket_rcv+0x164/0xa80
[  137.712004] Call Trace:
[  137.712029] [c000001fffd938a0] [c000000000a7a69c] tpacket_rcv+0x12c/0xa80 (unreliable)
[  137.712110] [c000001fffd93990] [c0000000009301ac] __netif_receive_skb_core+0x4ec/0xd60
[  137.712190] [c000001fffd93a70] [c000000000933f74] netif_receive_skb_internal+0x34/0xd0
[  137.712269] [c000001fffd93ab0] [c0000000009350ac] napi_gro_receive+0xec/0x1b0
[  137.712346] [c000001fffd93af0] [d000000010f55a0c] bnx2x_rx_int+0xb4c/0x1710 [bnx2x]
[  137.712431] [c000001fffd93c90] [d000000010f56eb0] bnx2x_poll+0x310/0x440 [bnx2x]
[  137.712510] [c000001fffd93d40] [c00000000093472c] net_rx_action+0x2dc/0x470
[  137.712580] [c000001fffd93e50] [c0000000000bb0b8] __do_softirq+0x188/0x3a0
[  137.712648] [c000001fffd93f40] [c0000000000bb548] irq_exit+0xc8/0x100
[  137.712731] [c000001fffd93f60] [c0000000000111bc] __do_irq+0x8c/0x190
[  137.712867] [c000001fffd93f90] [c0000000000242f0] call_do_irq+0x14/0x24
[  137.713004] [c000001e505aba70] [c000000000011358] do_IRQ+0x98/0x140
[  137.713141] [c000001e505abac0] [c000000000002594] hardware_interrupt_common+0x114/0x180
[  137.713301] --- interrupt: 501 at arch_local_irq_restore+0x5c/0x90
[  137.713301]     LR = arch_local_irq_restore+0x40/0x90
[  137.713505] [c000001e505abdb0] [c00000000148db10] powernv_idle_driver+0xd8/0x3e8 (unreliable)
[  137.713686] [c000001e505abdd0] [c0000000008ca0a8] cpuidle_enter_state+0x1a8/0x3c0
[  137.713845] [c000001e505abe30] [c000000000113a68] call_cpuidle+0x78/0xd0
[  137.713981] [c000001e505abe70] [c000000000113e0c] cpu_startup_entry+0x34c/0x460
[  137.714138] [c000001e505abf30] [c000000000044f4c] start_secondary+0x33c/0x360
[  137.714274] [c000001e505abf90] [c000000000008b6c] start_secondary_prolog+0x10/0x14
[  137.714433] Instruction dump:
[  137.714500] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
[  137.714721] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
[  137.714944] ---[ end trace fb709e6a13141985 ]---
[  137.716201]
[  137.716253] Sending IPI to other CPUs

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https://bugs.launchpad.net/bugs/1555671

Title:
  Kernel crash with tshark/tcpdump

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Xenial:
  Confirmed

Bug description:
  Reproducible crash when just running "tcpdump -i br0" (or any other
  interface).

  [   95.615160] Oops: Exception in kernel mode, sig: 4 [#1]
  [   95.615237] SMP NR_CPUS=2048 NUMA PowerNV
  [   95.615245] Modules linked in: nfnetlink_queue nfnetlink_log nfnetlink bluetooth drbd(OE) xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nfsv3 nfs_acl nfs lockd grace fscache binfmt_misc bridge stp llc kvm_hv kvm aha3xx(OE) uio_pdrv_genirq uio powernv_rng rdma_cm iw_cm mlx5_ib ib_ipoib ib_uverbs sunrpc ib_umad ib_cm ib_sa ib_mad ib_core ib_addr autofs4 ses enclosure bnx2x mlx5_core vxlan ip6_udp_tunnel udp_tunnel mdio ipr nvme libcrc32c
  [   95.616011] CPU: 48 PID: 0 Comm: swapper/48 Tainted: G           OE   4.4.0-11-generic #26-Ubuntu
  [   95.616090] task: c000000ff098bd90 ti: c000001fffe10000 task.ti: c000000ff095c000
  [   95.616159] NIP: d000000017360000 LR: c000000000ab1b1c CTR: d000000017360000
  [   95.616227] REGS: c000001fffe13360 TRAP: 0e40   Tainted: G           OE    (4.4.0-11-generic)
  [   95.616305] MSR: 9000000000089033 <SF,HV,EE,ME,IR,DR,RI,LE>  CR: 24002828  XER: 00000000
  [   95.616476] CFAR: c000000000ab1b18 SOFTE: 1
  GPR00: c000000000ab7954 c000001fffe135e0 c0000000015a3b00 c000000fc1cf9f00
  GPR04: d000000017340028 000000000000013a c000000fdfc02000 000000000000ffff
  GPR08: c000000001515f00 d000000017360000 0000000000000000 d0000000141cb7c8
  GPR12: d000000017360000 c000000007afc800 c000000fba6423c0 c000000fd94b0ff8
  GPR16: c000000fda398900 000000000000008f c000001fffe139f0 0000000000000001
  GPR20: 0000000000000000 000000000000dd86 0000000000000000 ffffffff80000000
  GPR24: 0000000000000005 000000000000012c c000000fe063f010 c000000fdfc02000
  GPR28: 000000000000013a c000000fde053800 c000000fc1cf9f00 000000000000013a
  [   95.617343] NIP [d000000017360000] 0xd000000017360000
  [   95.617393] LR [c000000000ab1b1c] run_filter+0x6c/0xc0
  [   95.617438] Call Trace:
  [   95.617462] [c000001fffe135e0] [c000000fd8e27910] 0xc000000fd8e27910 (unreliable)
  [   95.617543] [c000001fffe13620] [c000000000ab7954] tpacket_rcv+0x144/0xa50
  [   95.617613] [c000001fffe13710] [c000000000966804] __netif_receive_skb_core+0x8b4/0xdc0
  [   95.617692] [c000001fffe137f0] [c00000000096a3d4] netif_receive_skb_internal+0x34/0xd0
  [   95.617775] [c000001fffe13830] [d0000000141b6b04] br_handle_frame_finish+0x2a4/0x6f0 [bridge]
  [   95.617857] [c000001fffe13900] [d0000000141b717c] br_handle_frame+0x22c/0x3b0 [bridge]
  [   95.617936] [c000001fffe13990] [c000000000966418] __netif_receive_skb_core+0x4c8/0xdc0
  [   95.618016] [c000001fffe13a70] [c00000000096a3d4] netif_receive_skb_internal+0x34/0xd0
  [   95.618095] [c000001fffe13ab0] [c00000000096b5bc] napi_gro_receive+0x11c/0x230
  [   95.618182] [c000001fffe13af0] [d000000011b97b1c] bnx2x_rx_int+0xb4c/0x1710 [bnx2x]
  [   95.618278] [c000001fffe13c90] [d000000011b98fc0] bnx2x_poll+0x310/0x440 [bnx2x]
  [   95.618436] [c000001fffe13d40] [c00000000096ab6c] net_rx_action+0x2dc/0x4a0
  [   95.618575] [c000001fffe13e50] [c0000000000beaf8] __do_softirq+0x188/0x3e0
  [   95.618710] [c000001fffe13f40] [c0000000000befc8] irq_exit+0xc8/0x100
  [   95.618848] [c000001fffe13f60] [c00000000001132c] __do_irq+0x8c/0x1d0
  [   95.618985] [c000001fffe13f90] [c000000000024800] call_do_irq+0x14/0x24
  [   95.619121] [c000000ff095fa70] [c000000000011508] do_IRQ+0x98/0x140
  [   95.619255] [c000000ff095fac0] [c000000000002594] hardware_interrupt_common+0x114/0x180
  [   95.619415] --- interrupt: 501 at arch_local_irq_restore+0x5c/0x90
  [   95.619415]     LR = arch_local_irq_restore+0x40/0x90
  [   95.619617] [c000000ff095fdb0] [c000000ff941d678] 0xc000000ff941d678 (unreliable)
  [   95.619775] [c000000ff095fdd0] [c000000000900708] cpuidle_enter_state+0x1a8/0x410
  [   95.619933] [c000000ff095fe30] [c000000000119898] call_cpuidle+0x78/0xd0
  [   95.620069] [c000000ff095fe70] [c000000000119c6c] cpu_startup_entry+0x37c/0x490
  [   95.620229] [c000000ff095ff30] [c00000000004565c] start_secondary+0x33c/0x360
  [   95.620365] [c000000ff095ff90] [c000000000008b6c] start_secondary_prolog+0x10/0x14
  [   95.620524] Instruction dump:
  [   95.620590] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
  [   95.620811] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
  [   95.621035] ---[ end trace 4e7432dd9190f0b2 ]---

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