skbuff: skb_over_panic: text:ffffffff843627c3 len:56 put:8 head:ffff888117eb4800 data:ffff888117eb4850 tail:0x88 end:0x80 dev:ip6gretap1
------------[ cut here ]------------
kernel BUG at net/core/skbuff.c:110!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 2083 Comm: kworker/0:18 Not tainted 5.10.102-syzkaller-00171-ge1b86e7f5cbb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: rcu_gp process_srcu
RIP: 0010:skb_panic+0x14f/0x160 net/core/skbuff.c:106
Code: 87 85 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 b8 00 00 00 00 53 41 56 41 55 41 54 e8 ac c1 8e fd 48 83 c4 20 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5 41
RSP: 0018:ffffc900000079d0 EFLAGS: 00010282
RAX: 0000000000000088 RBX: ffff88811957a000 RCX: 79958c514db10400
RDX: 0000000000000502 RSI: 0000000000000502 RDI: 0000000000000000
RBP: ffffc90000007a18 R08: ffffffff81544c88 R09: ffffed103ee0a5d8
R10: ffffed103ee0a5d8 R11: 0000000000000000 R12: ffff888117eb4850
R13: 0000000000000088 R14: 0000000000000080 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd0bde2f98 CR3: 0000000149f53000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 skb_over_panic+0x2c/0x30 net/core/skbuff.c:115
 skb_put+0x205/0x210 net/core/skbuff.c:1877
 mld_newpack+0x653/0x9c0 net/ipv6/mcast.c:1626
 add_grhead net/ipv6/mcast.c:1707 [inline]
 add_grec+0xf40/0x1370 net/ipv6/mcast.c:1838
 mld_send_cr net/ipv6/mcast.c:1964 [inline]
 mld_ifc_timer_expire+0x781/0xc50 net/ipv6/mcast.c:2471
 call_timer_fn+0x35/0x280 kernel/time/timer.c:1420
 expire_timers+0x21f/0x3b0 kernel/time/timer.c:1465
 __run_timers+0x548/0x680 kernel/time/timer.c:1756
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1769
 __do_softirq+0x27e/0x598 kernel/softirq.c:305
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:402 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:432
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:444
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1095
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:delay_tsc+0x66/0xe0 arch/x86/lib/delay.c:79
Code: 09 c3 4c 29 e3 bf 01 00 00 00 e8 c5 fb d8 fe 65 8b 05 ea b0 90 7d 85 c0 0f 94 c0 4c 39 f3 73 70 0f 1f 40 00 a8 01 75 45 f3 90 <bf> 01 00 00 00 e8 50 fa d8 fe e8 bb 16 24 02 41 39 c7 75 36 0f 01
RSP: 0018:ffffc900078f7b90 EFLAGS: 00000246
RAX: 0000000080000000 RBX: 0000000000001472 RCX: 0000000000000001
RDX: 000000000000003f RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc900078f7bb0 R08: ffffffff824e2a6c R09: fffff52000f1ef7d
R10: fffff52000f1ef7d R11: 0000000000000000 R12: 0000003f7ba17346
R13: 0000000000000008 R14: 0000000000002afa R15: 0000000000000000
 __delay arch/x86/lib/delay.c:203 [inline]
 __const_udelay+0x5e/0x70 arch/x86/lib/delay.c:217
 try_check_zero+0x338/0x3b0 kernel/rcu/srcutree.c:708
 srcu_advance_state kernel/rcu/srcutree.c:1215 [inline]
 process_srcu+0x197/0xc20 kernel/rcu/srcutree.c:1310
 process_one_work+0x6b4/0xfb0 kernel/workqueue.c:2296
 worker_thread+0xb15/0x1600 kernel/workqueue.c:2442
 kthread+0x371/0x390 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Modules linked in:
---[ end trace 6bfac50e56ff5579 ]---
RIP: 0010:skb_panic+0x14f/0x160 net/core/skbuff.c:106
Code: 87 85 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 b8 00 00 00 00 53 41 56 41 55 41 54 e8 ac c1 8e fd 48 83 c4 20 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5 41
RSP: 0018:ffffc900000079d0 EFLAGS: 00010282
RAX: 0000000000000088 RBX: ffff88811957a000 RCX: 79958c514db10400
RDX: 0000000000000502 RSI: 0000000000000502 RDI: 0000000000000000
RBP: ffffc90000007a18 R08: ffffffff81544c88 R09: ffffed103ee0a5d8
R10: ffffed103ee0a5d8 R11: 0000000000000000 R12: ffff888117eb4850
R13: 0000000000000088 R14: 0000000000000080 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd0bde2f98 CR3: 0000000149f53000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	09 c3                	or     %eax,%ebx
   2:	4c 29 e3             	sub    %r12,%rbx
   5:	bf 01 00 00 00       	mov    $0x1,%edi
   a:	e8 c5 fb d8 fe       	callq  0xfed8fbd4
   f:	65 8b 05 ea b0 90 7d 	mov    %gs:0x7d90b0ea(%rip),%eax        # 0x7d90b100
  16:	85 c0                	test   %eax,%eax
  18:	0f 94 c0             	sete   %al
  1b:	4c 39 f3             	cmp    %r14,%rbx
  1e:	73 70                	jae    0x90
  20:	0f 1f 40 00          	nopl   0x0(%rax)
  24:	a8 01                	test   $0x1,%al
  26:	75 45                	jne    0x6d
  28:	f3 90                	pause
* 2a:	bf 01 00 00 00       	mov    $0x1,%edi <-- trapping instruction
  2f:	e8 50 fa d8 fe       	callq  0xfed8fa84
  34:	e8 bb 16 24 02       	callq  0x22416f4
  39:	41 39 c7             	cmp    %eax,%r15d
  3c:	75 36                	jne    0x74
  3e:	0f                   	.byte 0xf
  3f:	01                   	.byte 0x1