====================================== | [ 94.745102] br0: port 2(veth2) entered forwarding state | [ 110.109950] ------------[ cut here ]------------ | [ 110.109997] kernel BUG at net/core/skbuff.c:3505! | [ 110.110033] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 110.110102] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 110.110164] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 110.110195] Code: 89 5c 24 04 44 89 d9 44 89 ff 44 89 ea ff d0 0f 1f 00 44 8b 5c 24 04 41 89 c7 eb b6 ff d0 0f 1f 00 41 89 c1 e9 71 fd ff ff 90 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 All code ======== 0: 89 5c 24 04 mov %ebx,0x4(%rsp) 4: 44 89 d9 mov %r11d,%ecx 7: 44 89 ff mov %r15d,%edi a: 44 89 ea mov %r13d,%edx d: ff d0 call *%rax f: 0f 1f 00 nopl (%rax) 12: 44 8b 5c 24 04 mov 0x4(%rsp),%r11d 17: 41 89 c7 mov %eax,%r15d 1a: eb b6 jmp 0xffffffffffffffd2 1c: ff d0 call *%rax 1e: 0f 1f 00 nopl (%rax) 21: 41 89 c1 mov %eax,%r9d 24: e9 71 fd ff ff jmp 0xfffffffffffffd9a 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) 33: 00 00 00 00 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) 9: 00 00 00 00 d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop [ 110.110288] RSP: 0018:ffffa35480114db0 EFLAGS: 00010202 [ 110.110319] RAX: 0000000000000040 RBX: 0000000000000000 RCX: 0000000000000000 [ 110.110362] RDX: ffff96a6012899c0 RSI: 0000000000000100 RDI: ffff96a6012898c0 [ 110.110406] RBP: ffffa35480114e08 R08: ffffa35480114e08 R09: 0000000000000000 [ 110.110449] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffbc4bba80 [ 110.110487] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 110.110527] FS: 00007f5b247b5300(0000) GS:ffff96a63ed00000(0000) knlGS:0000000000000000 [ 110.110569] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 110.110605] CR2: 00007ffcc600aff8 CR3: 000000000243c001 CR4: 0000000000770ef0 [ 110.110650] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 110.110692] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 110.110736] PKRU: 55555554 [ 110.110748] Call Trace: [ 110.110764] <IRQ> [ 110.110780] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) [ 110.110807] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) [ 110.110832] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 110.110857] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) [ 110.110881] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 110.110906] ? exc_invalid_op (arch/x86/kernel/traps.c:265) [ 110.110933] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 110.110952] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 110.110980] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 110.111004] __skb_checksum_complete (./arch/x86/include/asm/checksum_64.h:170 ./arch/x86/include/asm/checksum_64.h:180 net/core/skbuff.c:3643) [ 110.111035] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) [ 110.111066] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) [ 110.111097] icmp_rcv (./include/linux/skbuff.h:4567 net/ipv4/icmp.c:1213) [ 110.111123] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5)) [ 110.111157] ip_local_deliver_finish (./include/linux/rcupdate.h:782 net/ipv4/ip_input.c:234) [ 110.111186] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) [ 110.111219] process_backlog (./include/linux/rcupdate.h:782 net/core/dev.c:6053) [ 110.111242] __napi_poll (net/core/dev.c:6703) [ 110.111268] net_rx_action (net/core/dev.c:6774 net/core/dev.c:6886) [ 110.111291] __do_softirq (kernel/softirq.c:553) [ 110.111318] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) [ 110.111344] </IRQ> [ 110.111361] <TASK> [ 110.111374] __local_bh_enable_ip (kernel/softirq.c:381) [ 110.111399] __neigh_event_send (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/neigh.h:237 net/core/neighbour.c:1246) [ 110.111425] neigh_resolve_output (net/core/neighbour.c:1547) [ 110.111454] ip_finish_output2 (./include/net/neighbour.h:542 net/ipv4/ip_output.c:235) [ 110.111479] ? __ip_finish_output (./include/linux/skbuff.h:4942 net/ipv4/ip_output.c:307 net/ipv4/ip_output.c:295) [ 110.111510] ip_push_pending_frames (./include/net/dst.h:450 net/ipv4/ip_output.c:129 net/ipv4/ip_output.c:1496 net/ipv4/ip_output.c:1516) [ 110.111542] raw_sendmsg (net/ipv4/raw.c:648) [ 110.111567] ? walk_system_ram_range (kernel/resource.c:524) [ 110.111600] ? __pte_offset_map (./include/linux/pgtable.h:298 ./include/linux/pgtable.h:518 mm/pgtable-generic.c:287) [ 110.111624] ? __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) [ 110.111648] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) [ 110.111675] ? handle_mm_fault (mm/memory.c:5330 mm/memory.c:5486) [ 110.111702] ? do_user_addr_fault (./include/linux/rcupdate.h:782 ./include/linux/mm.h:688 arch/x86/mm/fault.c:1357) [ 110.111733] __x64_sys_sendto (net/socket.c:2203 net/socket.c:2199 net/socket.c:2199) [ 110.111757] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 110.111783] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 110.111814] RIP: 0033:0x7f5b24a8b85a [ 110.111837] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89 All code ======== 0: d8 64 89 02 fsubs 0x2(%rcx,%rcx,4) 4: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax b: eb b8 jmp 0xffffffffffffffc5 d: 0f 1f 00 nopl (%rax) 10: f3 0f 1e fa endbr64 14: 41 89 ca mov %ecx,%r10d 17: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax 1e: 00 1f: 85 c0 test %eax,%eax 21: 75 15 jne 0x38 23: b8 2c 00 00 00 mov $0x2c,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 7e ja 0xb0 32: c3 ret 33: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 38: 41 54 push %r12 3a: 48 83 ec 30 sub $0x30,%rsp 3e: 44 rex.R 3f: 89 .byte 0x89 Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 7e ja 0x86 8: c3 ret 9: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) e: 41 54 push %r12 10: 48 83 ec 30 sub $0x30,%rsp 14: 44 rex.R 15: 89 .byte 0x89 [ 110.111931] RSP: 002b:00007ffcc600ba18 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 110.111974] RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007f5b24a8b85a [ 110.112012] RDX: 0000000000000040 RSI: 000000000050e340 RDI: 0000000000000005 [ 110.112050] RBP: 00007ffcc600ba70 R08: 00000000004185e0 R09: 0000000000000010 [ 110.112088] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000054 Finger prints: __skb_checksum:__skb_checksum_complete:icmp_rcv:ip_protocol_deliver_rcu