======================================
| [ 44.033183][ T401] br2: port 2(vx2) entered forwarding state
| [ 44.194673][ C0] ------------[ cut here ]------------
| [ 44.195000][ C0] kernel BUG at net/core/skbuff.c:3505!
| [ 44.195182][ C0] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[ 44.195606][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 44.195951][ C0] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 44.196119][ 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 17 a6 91 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 17 a6 91 fe call 0xfffffffffe91a656
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 17 a6 91 fe call 0xfffffffffe91a62c
15: 8b .byte 0x8b
[ 44.196675][ C0] RSP: 0018:ffffc90000007888 EFLAGS: 00010202
[ 44.196862][ C0] RAX: 0000000000000d0e RBX: 0000000000000008 RCX: 1ffff11000a6e509
[ 44.197085][ C0] RDX: 0000000000000092 RSI: dffffc0000000000 RDI: ffff888005372848
[ 44.197305][ C0] RBP: 0000000000000d0e R08: 0000000000000008 R09: ffffed10003999c9
[ 44.197525][ C0] R10: ffff888003b3b5c8 R11: ffff888005372740 R12: 0000000000000008
[ 44.197751][ C0] R13: 0000000000000000 R14: ffffc90000007948 R15: ffff888003b3b5c8
[ 44.197973][ C0] FS: 0000000000000000(0000) GS:ffff888036000000(0000) knlGS:0000000000000000
[ 44.198230][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 44.198416][ C0] CR2: 00007fe04787f270 CR3: 000000000571a001 CR4: 0000000000770ef0
[ 44.198638][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 44.198865][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 44.199084][ C0] PKRU: 55555554
[ 44.199195][ C0] Call Trace:
[ 44.199307][ C0]
[ 44.199383][ C0] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447)
[ 44.199514][ C0] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154)
[ 44.199631][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 44.199782][ C0] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175)
[ 44.199935][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 44.200085][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 44.200235][ C0] ? handle_invalid_op (arch/x86/kernel/traps.c:213)
[ 44.200382][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 44.200558][ C0] ? exc_invalid_op (arch/x86/kernel/traps.c:265)
[ 44.200708][ C0] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568)
[ 44.200863][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 44.201023][ C0] ? __skb_checksum (net/core/skbuff.c:3441 (discriminator 4))
[ 44.201174][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 44.201328][ 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)
[ 44.201481][ C0] __skb_checksum_complete (net/core/skbuff.c:3643)
[ 44.201633][ C0] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637)
[ 44.201821][ C0] ? __pfx_csum_partial_ext (./include/net/checksum.h:120)
[ 44.201970][ C0] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103)
[ 44.202127][ C0] ? ipv6_raw_deliver (net/ipv6/raw.c:142)
[ 44.202280][ C0] icmpv6_rcv (./include/linux/skbuff.h:4567 net/ipv6/icmp.c:921)
[ 44.202429][ C0] ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:438 (discriminator 5))
[ 44.202580][ C0] ? ip6_route_input (./include/linux/skbuff.h:1168 net/ipv6/route.c:2594)
[ 44.202731][ C0] ip6_input_finish (./include/linux/rcupdate.h:779 net/ipv6/ip6_input.c:484)
[ 44.202881][ C0] ip6_input (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:492)
[ 44.202991][ C0] ? __pfx_ip6_input (net/ipv6/ip6_input.c:491)
[ 44.203141][ C0] ? ip6_rcv_core (./include/linux/skbuff.h:3181 net/ipv6/ip6_input.c:291)
[ 44.203292][ C0] ipv6_rcv (./include/net/dst.h:460 net/ipv6/ip6_input.c:79 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:310)
[ 44.203406][ C0] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304)
[ 44.203558][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 44.203704][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051)
[ 44.203865][ C0] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304)
[ 44.204018][ C0] __netif_receive_skb_one_core (net/core/dev.c:5603)
[ 44.204203][ C0] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603)
[ 44.204387][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 44.204535][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725)
[ 44.204696][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051)
[ 44.204844][ C0] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053)
[ 44.204994][ C0] __napi_poll.constprop.0 (net/core/dev.c:6703)
[ 44.205143][ C0] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886)
[ 44.205293][ C0] ? __pfx_net_rx_action (net/core/dev.c:6850)
[ 44.205441][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359)
[ 44.205624][ C0] __do_softirq (kernel/softirq.c:553)
[ 44.205775][ C0] irq_exit_rcu (kernel/softirq.c:427 kernel/softirq.c:632 kernel/softirq.c:644)
[ 44.205890][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 14))
[ 44.206039][ C0]
[ 44.206115][ C0]
[ 44.206193][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:649)
[ 44.206384][ C0] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194)
[ 44.206575][ C0] Code: 10 e8 f1 92 a3 fd 48 89 ef e8 19 ff a3 fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d 15 25 19 52 <74> 0e 5b 5d c3 cc cc cc cc e8 3f bb c5 fd eb dc 0f 1f 44 00 00 5b
All code
========
0: 10 e8 adc %ch,%al
2: f1 int1
3: 92 xchg %eax,%edx
4: a3 fd 48 89 ef e8 19 movabs %eax,0xa3ff19e8ef8948fd
b: ff a3
d: fd std
e: 81 e3 00 02 00 00 and $0x200,%ebx
14: 75 1d jne 0x33
16: 9c pushf
17: 58 pop %rax
18: f6 c4 02 test $0x2,%ah
1b: 75 29 jne 0x46
1d: 48 85 db test %rbx,%rbx
20: 74 01 je 0x23
22: fb sti
23: 65 ff 0d 15 25 19 52 decl %gs:0x52192515(%rip) # 0x5219253f
2a:* 74 0e je 0x3a <-- trapping instruction
2c: 5b pop %rbx
2d: 5d pop %rbp
2e: c3 ret
2f: cc int3
30: cc int3
31: cc int3
32: cc int3
33: e8 3f bb c5 fd call 0xfffffffffdc5bb77
38: eb dc jmp 0x16
3a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
3f: 5b pop %rbx
Code starting with the faulting instruction
===========================================
0: 74 0e je 0x10
2: 5b pop %rbx
3: 5d pop %rbp
4: c3 ret
5: cc int3
6: cc int3
7: cc int3
8: cc int3
9: e8 3f bb c5 fd call 0xfffffffffdc5bb4d
e: eb dc jmp 0xffffffffffffffec
10: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
15: 5b pop %rbx
[ 44.207093][ C0] RSP: 0018:ffffc900009df9d8 EFLAGS: 00000286
[ 44.207282][ C0] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff5f5bf69
[ 44.207510][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffadea8dc1
[ 44.207735][ C0] RBP: ffffffffb18a4e90 R08: 0000000000000001 R09: fffffbfff5f5c5ea
[ 44.207955][ C0] R10: ffffffffafae2f57 R11: ffffc900009df7a1 R12: dffffc0000000000
[ 44.208174][ C0] R13: ffff888005431000 R14: 0000000000000000 R15: ffff888005432000
[ 44.208400][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194)
[ 44.208584][ C0] __debug_check_no_obj_freed (lib/debugobjects.c:1000)
[ 44.208739][ C0] ? __pfx___debug_check_no_obj_freed (lib/debugobjects.c:960)
[ 44.208921][ C0] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:865 ./include/linux/mmzone.h:2026 arch/x86/mm/physaddr.c:65)
[ 44.209073][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 44.209261][ C0] kfree (mm/slub.c:2093 mm/slub.c:4299 mm/slub.c:4409)
[ 44.209373][ C0] ? p9_req_put (net/9p/client.c:252 net/9p/client.c:405 net/9p/client.c:399)
[ 44.209524][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 44.209713][ C0] p9_req_put (net/9p/client.c:252 net/9p/client.c:405 net/9p/client.c:399)
[ 44.209825][ C0] p9_client_getattr_dotl (net/9p/client.c:1773)
[ 44.209972][ C0] v9fs_vfs_getattr_dotl (fs/9p/vfs_inode_dotl.c:473)
[ 44.210134][ C0] ovl_getattr (fs/overlayfs/overlayfs.h:416 fs/overlayfs/inode.c:174)
[ 44.210295][ C0] ? __pfx_ovl_getattr (fs/overlayfs/inode.c:159)
[ 44.210457][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244)
[ 44.210620][ C0] ? __lock_release (kernel/locking/lockdep.c:5430)
[ 44.210782][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073)
[ 44.210943][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 44.211108][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725)
[ 44.211280][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073)
[ 44.211449][ C0] ? vfs_getattr_nosec (fs/stat.c:112)
[ 44.211621][ C0] vfs_fstat (./include/linux/file.h:45 fs/stat.c:199)
[ 44.211749][ C0] __do_sys_newfstatat (fs/stat.c:469)
[ 44.211925][ C0] ? __pfx___do_sys_newfstatat (fs/stat.c:464)
[ 44.212096][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 44.212308][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 44.212480][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)
[ 44.212690][ C0] RIP: 0033:0x7fe0479e2eae
[ 44.212869][ C0] Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 07 00 00 00 0f 1f 80 00 00 00 00 f3 0f 1e fa 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 0b 31 c0 c3 0f 1f 84 00 00 00 00 00 f7 d8 89 05
All code
========
0: 48 89 f2 mov %rsi,%rdx
3: b9 00 01 00 00 mov $0x100,%ecx
8: 48 89 fe mov %rdi,%rsi
b: bf 9c ff ff ff mov $0xffffff9c,%edi
10: e9 07 00 00 00 jmp 0x1c
15: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
1c: f3 0f 1e fa endbr64
20: 41 89 ca mov %ecx,%r10d
23: b8 06 01 00 00 mov $0x106,%eax
28: 0f 05 syscall
2a:* 3d 00 f0 ff ff cmp $0xfffff000,%eax <-- trapping instruction
2f: 77 0b ja 0x3c
31: 31 c0 xor %eax,%eax
33: c3 ret
34: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
3b: 00
3c: f7 d8 neg %eax
3e: 89 .byte 0x89
3f: 05 .byte 0x5
Code starting with the faulting instruction
===========================================
0: 3d 00 f0 ff ff cmp $0xfffff000,%eax
5: 77 0b ja 0x12
7: 31 c0 xor %eax,%eax
9: c3 ret
a: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
11: 00
12: f7 d8 neg %eax
14: 89 .byte 0x89
15: 05 .byte 0x5
[ 44.213464][ C0] RSP: 002b:00007ffd927dab18 EFLAGS: 00000206 ORIG_RAX: 0000000000000106
[ 44.213721][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe0479e2eae
[ 44.213979][ C0] RDX: 00007ffd927dabb0 RSI: 00007fe0479e6cfb RDI: 0000000000000005
[ 44.214225][ C0] RBP: 00007ffd927dac70 R08: 00007fe04795a4e0 R09: 00007fe0479f2220
[ 44.214470][ C0] R10: 0000000000001000 R11: 0000000000000206 R12: 00007fe0479f2220
Finger prints:
__skb_checksum:__skb_checksum_complete:icmpv6_rcv:ip6_protocol_deliver_rcu