------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:1790!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 25648 Comm: syz-executor.2 Not tainted 6.1.0-syzkaller-07445-g7e68dd7d07a2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:skb_copy+0x344/0x3c0 net/core/skbuff.c:1790
Code: 89 e7 e8 3f fa ff ff e8 7a 6b cd f9 4c 89 e0 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 63 6b cd f9 0f 0b e8 5c 6b cd f9 <0f> 0b e8 75 18 1b fa e9 b4 fd ff ff e8 ab 18 1b fa e9 7b fd ff ff
RSP: 0018:ffffc900001dfff0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00000000fffffff2 RCX: 0000000000000100
RDX: ffff88801bcc3a80 RSI: ffffffff87b347b4 RDI: 0000000000000005
RBP: ffff8880284dba00 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff2 R11: 0000000000000000 R12: ffff8880284db000
R13: 0000000000008140 R14: ffff888022150000 R15: 000000000000805e
FS:  00007f6e077f5700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30745000 CR3: 0000000046cb4000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 skb_unshare include/linux/skbuff.h:2007 [inline]
 netem_enqueue+0x2932/0x3570 net/sched/sch_netem.c:504
 netem_enqueue+0x202f/0x3570 net/sched/sch_netem.c:483
 dev_qdisc_enqueue+0x46/0x390 net/core/dev.c:3778
 __dev_xmit_skb net/core/dev.c:3867 [inline]
 __dev_queue_xmit+0x2279/0x3ba0 net/core/dev.c:4215
 dev_queue_xmit include/linux/netdevice.h:3035 [inline]
 neigh_hh_output include/net/neighbour.h:530 [inline]
 neigh_output include/net/neighbour.h:544 [inline]
 ip6_finish_output2+0xfa3/0x1530 net/ipv6/ip6_output.c:134
 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
 ip6_finish_output+0x694/0x1170 net/ipv6/ip6_output.c:206
 NF_HOOK_COND include/linux/netfilter.h:291 [inline]
 ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 NF_HOOK include/linux/netfilter.h:296 [inline]
 ip6_xmit+0x11f7/0x1c60 net/ipv6/ip6_output.c:343
 inet6_csk_xmit+0x3b5/0x6d0 net/ipv6/inet6_connection_sock.c:135
 __tcp_transmit_skb+0x1967/0x3800 net/ipv4/tcp_output.c:1399
 tcp_transmit_skb net/ipv4/tcp_output.c:1417 [inline]
 __tcp_retransmit_skb+0x5fc/0x29e0 net/ipv4/tcp_output.c:3241
 tcp_retransmit_skb+0x2e/0x360 net/ipv4/tcp_output.c:3264
 tcp_retransmit_timer+0xf5c/0x3410 net/ipv4/tcp_timer.c:537
 tcp_write_timer_handler net/ipv4/tcp_timer.c:620 [inline]
 tcp_write_timer_handler+0x4e2/0x9f0 net/ipv4/tcp_timer.c:594
 tcp_write_timer+0xa6/0x2b0 net/ipv4/tcp_timer.c:637
 call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1700
 expire_timers+0x2c6/0x5c0 kernel/time/timer.c:1751
 __run_timers kernel/time/timer.c:2022 [inline]
 __run_timers kernel/time/timer.c:1995 [inline]
 run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
 __do_softirq+0x1fb/0xadc kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x227/0x630 kernel/locking/lockdep.c:5636
Code: 2f 9f 7e 83 f8 01 0f 85 3a 03 00 00 9c 58 f6 c4 02 0f 85 25 03 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90006527a88 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000ca4f54 RCX: 55f1a138bbc414fd
RDX: 1ffff11003798899 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff91332a07
R10: fffffbfff2266540 R11: 1ffffffff18f36e9 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8c791100 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:325 [inline]
 rcu_read_lock include/linux/rcupdate.h:764 [inline]
 inet_twsk_purge+0x132/0x8a0 net/ipv4/inet_timewait_sock.c:268
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
 setup_net+0x9bd/0xe60 net/core/net_namespace.c:356
 copy_net_ns+0x31b/0x6b0 net/core/net_namespace.c:483
 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xc5/0x1f0 kernel/nsproxy.c:228
 ksys_unshare+0x449/0x920 kernel/fork.c:3184
 __do_sys_unshare kernel/fork.c:3255 [inline]
 __se_sys_unshare kernel/fork.c:3253 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:3253
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6e06a8c0d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6e077f5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f6e06babf80 RCX: 00007f6e06a8c0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006c060000
RBP: 00007f6e06ae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc19897d4f R14: 00007f6e077f5300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_copy+0x344/0x3c0 net/core/skbuff.c:1790
Code: 89 e7 e8 3f fa ff ff e8 7a 6b cd f9 4c 89 e0 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 63 6b cd f9 0f 0b e8 5c 6b cd f9 <0f> 0b e8 75 18 1b fa e9 b4 fd ff ff e8 ab 18 1b fa e9 7b fd ff ff
RSP: 0018:ffffc900001dfff0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00000000fffffff2 RCX: 0000000000000100
RDX: ffff88801bcc3a80 RSI: ffffffff87b347b4 RDI: 0000000000000005
RBP: ffff8880284dba00 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff2 R11: 0000000000000000 R12: ffff8880284db000
R13: 0000000000008140 R14: ffff888022150000 R15: 000000000000805e
FS:  00007f6e077f5700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30745000 CR3: 0000000046cb4000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	9f                   	lahf
   1:	7e 83                	jle    0xffffff86
   3:	f8                   	clc
   4:	01 0f                	add    %ecx,(%rdi)
   6:	85 3a                	test   %edi,(%rdx)
   8:	03 00                	add    (%rax),%eax
   a:	00 9c 58 f6 c4 02 0f 	add    %bl,0xf02c4f6(%rax,%rbx,2)
  11:	85 25 03 00 00 48    	test   %esp,0x48000003(%rip)        # 0x4800001a
  17:	83 7c 24 08 00       	cmpl   $0x0,0x8(%rsp)
  1c:	74 01                	je     0x1f
  1e:	fb                   	sti
  1f:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  26:	fc ff df
* 29:	48 01 c3             	add    %rax,%rbx <-- trapping instruction
  2c:	48 c7 03 00 00 00 00 	movq   $0x0,(%rbx)
  33:	48 c7 43 08 00 00 00 	movq   $0x0,0x8(%rbx)
  3a:	00
  3b:	48                   	rex.W
  3c:	8b                   	.byte 0x8b
  3d:	84                   	.byte 0x84
  3e:	24                   	.byte 0x24