======================================
| [ 27.570448][ T49] br0: port 2(eth1) entered forwarding state
| [ 28.497267][ C0] ------------[ cut here ]------------
| [ 28.497638][ C0] kernel BUG at net/core/skbuff.c:3505!
| [ 28.497840][ C0] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[ 28.498295][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 28.498663][ C0] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 28.498844][ C0] Code: 44 89 14 24 ff d0 0f 1f 00 4c 8b 44 24 08 44 8b 14 24 41 89 c1 eb a5 89 e8 e9 2d fe ff ff 41 ff d5 0f 1f 00 e9 1f fa ff ff 90 <0f> 0b 48 8b 7c 24 10 89 54 24 48 48 89 44 24 40 e8 27 9e 8b fe 8b
All code
========
0: 44 89 14 24 mov %r10d,(%rsp)
4: ff d0 call *%rax
6: 0f 1f 00 nopl (%rax)
9: 4c 8b 44 24 08 mov 0x8(%rsp),%r8
e: 44 8b 14 24 mov (%rsp),%r10d
12: 41 89 c1 mov %eax,%r9d
15: eb a5 jmp 0xffffffffffffffbc
17: 89 e8 mov %ebp,%eax
19: e9 2d fe ff ff jmp 0xfffffffffffffe4b
1e: 41 ff d5 call *%r13
21: 0f 1f 00 nopl (%rax)
24: e9 1f fa ff ff jmp 0xfffffffffffffa48
29: 90 nop
2a:* 0f 0b ud2 <-- trapping instruction
2c: 48 8b 7c 24 10 mov 0x10(%rsp),%rdi
31: 89 54 24 48 mov %edx,0x48(%rsp)
35: 48 89 44 24 40 mov %rax,0x40(%rsp)
3a: e8 27 9e 8b fe call 0xfffffffffe8b9e66
3f: 8b .byte 0x8b
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 48 8b 7c 24 10 mov 0x10(%rsp),%rdi
7: 89 54 24 48 mov %edx,0x48(%rsp)
b: 48 89 44 24 40 mov %rax,0x40(%rsp)
10: e8 27 9e 8b fe call 0xfffffffffe8b9e3c
15: 8b .byte 0x8b
[ 28.499422][ C0] RSP: 0018:ffffc900000076a0 EFLAGS: 00010202
[ 28.499633][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff11001142c39
[ 28.499874][ C0] RDX: 0000000000000040 RSI: 0000000000000000 RDI: ffff888008a161c8
[ 28.500117][ C0] RBP: 0000000000000000 R08: ffffc90000007760 R09: fffffbfff1fdf30a
[ 28.500368][ C0] R10: ffffffff8fef9857 R11: ffffc90000007788 R12: 0000000000000000
[ 28.500612][ C0] R13: 0000000000000000 R14: ffffc90000007760 R15: ffff888003db2cc0
[ 28.500854][ C0] FS: 00007f958087b300(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[ 28.501139][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 28.501343][ C0] CR2: 00007f9580b0a840 CR3: 0000000007e22003 CR4: 0000000000770ef0
[ 28.501590][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 28.501835][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 28.502081][ C0] PKRU: 55555554
[ 28.502204][ C0] Call Trace:
[ 28.502331][ C0]
[ 28.502414][ C0] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447)
[ 28.502539][ C0] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154)
[ 28.502663][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 28.502826][ C0] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175)
[ 28.502987][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 28.503150][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 28.503312][ C0] ? handle_invalid_op (arch/x86/kernel/traps.c:213)
[ 28.503476][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 28.503637][ C0] ? exc_invalid_op (arch/x86/kernel/traps.c:265)
[ 28.503803][ C0] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568)
[ 28.503967][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 28.504128][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719)
[ 28.504292][ C0] __skb_checksum_complete (net/core/skbuff.c:3643)
[ 28.504459][ C0] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637)
[ 28.504662][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 28.504823][ C0] ? __pfx_csum_partial_ext (./include/net/checksum.h:120)
[ 28.504986][ C0] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103)
[ 28.505155][ C0] icmp_rcv (./include/linux/skbuff.h:4567 net/ipv4/icmp.c:1213)
[ 28.505280][ C0] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5))
[ 28.505443][ C0] ip_local_deliver_finish.constprop.0 (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234)
[ 28.505646][ C0] ? ip_rcv (./include/linux/skbuff.h:1136 ./include/net/dst.h:460 net/ipv4/ip_input.c:449 ./include/linux/netfilter.h:422 net/ipv4/ip_input.c:569)
[ 28.505769][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562)
[ 28.505931][ C0] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4))
[ 28.506134][ C0] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603)
[ 28.506342][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725)
[ 28.506504][ C0] ? netif_receive_skb_internal (./include/linux/rcupdate.h:298 (discriminator 16) ./include/linux/rcupdate.h:750 (discriminator 16) net/core/dev.c:5797 (discriminator 16))
[ 28.506706][ C0] netif_receive_skb_internal (net/core/dev.c:5810)
[ 28.506868][ C0] ? __pfx_netif_receive_skb_internal (net/core/dev.c:5789)
[ 28.507069][ C0] ? fdb_find_rcu (./include/linux/rhashtable.h:648 (discriminator 3) net/bridge/br_fdb.c:223 (discriminator 3))
[ 28.507233][ C0] ? __pfx_fdb_find_rcu (net/bridge/br_fdb.c:215)
[ 28.507396][ C0] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)
[ 28.507599][ C0] netif_receive_skb (net/core/dev.c:5869)
[ 28.507763][ C0] br_handle_frame_finish (net/bridge/br_input.c:216)
[ 28.507926][ C0] ? __pfx_br_handle_frame_finish (net/bridge/br_input.c:75)
[ 28.508127][ C0] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228)
[ 28.508289][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3))
[ 28.508413][ C0] br_handle_frame (net/bridge/br_input.c:417)
[ 28.508575][ C0] ? __pfx_br_handle_frame (net/bridge/br_input.c:321)
[ 28.508736][ C0] __netif_receive_skb_core.constprop.0 (net/core/dev.c:5504)
[ 28.508937][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137)
[ 28.509103][ C0] ? __pfx___netif_receive_skb_core.constprop.0 (net/core/dev.c:5397)
[ 28.509306][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 28.509467][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051)
[ 28.509631][ C0] __netif_receive_skb_one_core (net/core/dev.c:5609)
[ 28.509834][ C0] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603)
[ 28.510038][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725)
[ 28.510200][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051)
[ 28.510371][ C0] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053)
[ 28.510534][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 28.510699][ C0] __napi_poll.constprop.0 (net/core/dev.c:6703)
[ 28.510862][ C0] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886)
[ 28.511026][ C0] ? __pfx_net_rx_action (net/core/dev.c:6850)
[ 28.511190][ C0] ? hlock_class (kernel/locking/lockdep.c:223)
[ 28.511354][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274)
[ 28.511515][ C0] ? hrtimer_interrupt (kernel/time/hrtimer.c:1828)
[ 28.511677][ C0] __do_softirq (kernel/softirq.c:553)
[ 28.511842][ C0] ? __neigh_event_send (./include/linux/bottom_half.h:33 net/core/neighbour.c:1245)
[ 28.512005][ C0] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441)
[ 28.512130][ C0]
[ 28.512213][ C0]
[ 28.512294][ C0] __local_bh_enable_ip (kernel/softirq.c:381)
[ 28.512456][ C0] __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)
[ 28.512621][ C0] neigh_resolve_output (net/core/neighbour.c:1547)
[ 28.512784][ C0] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:386)
[ 28.512949][ C0] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9))
[ 28.513113][ C0] ip_finish_output2 (./include/net/neighbour.h:542 net/ipv4/ip_output.c:235)
[ 28.513274][ C0] ? __ip_make_skb (net/ipv4/ip_output.c:1379 net/ipv4/ip_output.c:1487)
[ 28.513437][ C0] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199)
[ 28.513600][ C0] ? __ip_finish_output (./include/linux/skbuff.h:1624 ./include/linux/skbuff.h:4942 net/ipv4/ip_output.c:307)
[ 28.513764][ C0] ip_push_pending_frames (net/ipv4/ip_output.c:1497 net/ipv4/ip_output.c:1516)
[ 28.513927][ C0] ? raw_sendmsg (net/ipv4/raw.c:641)
[ 28.514089][ C0] raw_sendmsg (net/ipv4/raw.c:648)
[ 28.514258][ C0] ? __pfx_raw_sendmsg (net/ipv4/raw.c:476)
[ 28.514425][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137)
[ 28.514590][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 28.514754][ C0] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 28.514919][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073)
[ 28.515084][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 28.515249][ C0] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228)
[ 28.515413][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725)
[ 28.515575][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073)
[ 28.515740][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073)
[ 28.515904][ C0] ? __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191)
[ 28.516066][ C0] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191)
[ 28.516232][ C0] ? __pfx___sys_sendto (net/socket.c:2161)
[ 28.516395][ C0] ? do_user_addr_fault (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 ./include/linux/mm.h:686 arch/x86/mm/fault.c:1357)
[ 28.516560][ C0] ? reacquire_held_locks (kernel/locking/lockdep.c:5279)
[ 28.516724][ C0] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 28.516885][ C0] ? do_user_addr_fault (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/linux/mm.h:688 arch/x86/mm/fault.c:1357)
[ 28.517050][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 28.517215][ C0] ? __up_read (./arch/x86/include/asm/atomic64_64.h:79 ./include/linux/atomic/atomic-arch-fallback.h:2735 ./include/linux/atomic/atomic-long.h:184 ./include/linux/atomic/atomic-instrumented.h:3289 kernel/locking/rwsem.c:1347)
[ 28.517377][ C0] ? __pfx___up_read (kernel/locking/rwsem.c:1339)
[ 28.517540][ C0] ? do_user_addr_fault (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/linux/mm.h:688 arch/x86/mm/fault.c:1357)
[ 28.517704][ C0] __x64_sys_sendto (net/socket.c:2199)
[ 28.517868][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 28.518069][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 28.518233][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)
[ 28.518439][ C0] RIP: 0033:0x7f9580b5185a
[ 28.518607][ C0] 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
[ 28.519188][ C0] RSP: 002b:00007ffe568f37f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 28.519435][ C0] RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007f9580b5185a
[ 28.519682][ C0] RDX: 0000000000000040 RSI: 0000000000bc3340 RDI: 0000000000000005
[ 28.519925][ C0] RBP: 00007ffe568f3850 R08: 00000000004185e0 R09: 0000000000000010
[ 28.520169][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000054
Finger prints:
__skb_checksum:__skb_checksum_complete:icmp_rcv:ip_protocol_deliver_rcu