IPv6: ADDRCONF(NETDEV_UP): bridge441: link is not ready
IPv6: ADDRCONF(NETDEV_UP): bridge442: link is not ready
IPv6: ADDRCONF(NETDEV_UP): bridge443: link is not ready
IPv6: ADDRCONF(NETDEV_UP): bridge444: link is not ready
watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [ksoftirqd/0:9]
Modules linked in:
irq event stamp: 14098521
hardirqs last  enabled at (14098520): [<ffffffff81983520>] kfree+0x110/0x210 mm/slab.c:3823 mm/slab.c:3823
hardirqs last disabled at (14098521): [<ffffffff81003d00>] trace_hardirqs_off_thunk+0x1a/0x1c
softirqs last  enabled at (4709126): [<ffffffff88400678>] __do_softirq+0x678/0x980 kernel/softirq.c:318 kernel/softirq.c:318
softirqs last disabled at (4709131): [<ffffffff81392417>] run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 kernel/softirq.c:653
CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] mm/slab.c:3823
RIP: 0010:kfree+0x123/0x210 mm/slab.c:3823 mm/slab.c:3823
Code: 89 ea 48 89 ee 4c 89 e7 e8 da ee ff ff f6 c7 02 74 ca e8 20 74 cf ff 48 83 3d 60 4d 59 08 00 0f 84 eb 00 00 00 48 89 df 57 9d <0f> 1f 44 00 00 5b 5d 41 5c 41 5d c3 65 8b 05 ea 4b 69 7e 83 f8 07
RSP: 0018:ffff8880b5a5f8e8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: 0000000000000286 RCX: 1ffff11016b49962
RDX: 0000000000000000 RSI: ffff8880b5a4caf0 RDI: 0000000000000286
RBP: ffff88803dce6300 R08: 0000000000400000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88813bff0940
R13: ffffffff8670bf6e R14: 0000000000000000 R15: ffff88803dce63f0
FS:  0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f38d85cd710 CR3: 00000000a12ef000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skb_free_head net/core/skbuff.c:563 [inline]
 skb_free_head net/core/skbuff.c:563 [inline] net/core/skbuff.c:583
 skb_release_data+0x6de/0x920 net/core/skbuff.c:583 net/core/skbuff.c:583
 skb_release_all net/core/skbuff.c:640 [inline]
 __kfree_skb net/core/skbuff.c:654 [inline]
 skb_release_all net/core/skbuff.c:640 [inline] net/core/skbuff.c:672
 __kfree_skb net/core/skbuff.c:654 [inline] net/core/skbuff.c:672
 kfree_skb+0x11a/0x3d0 net/core/skbuff.c:672 net/core/skbuff.c:672
 br_ip6_multicast_alloc_query net/bridge/br_multicast.c:505 [inline]
 br_multicast_alloc_query net/bridge/br_multicast.c:585 [inline]
 br_ip6_multicast_alloc_query net/bridge/br_multicast.c:505 [inline] net/bridge/br_multicast.c:941
 br_multicast_alloc_query net/bridge/br_multicast.c:585 [inline] net/bridge/br_multicast.c:941
 __br_multicast_send_query+0x2947/0x2dc0 net/bridge/br_multicast.c:941 net/bridge/br_multicast.c:941
 br_multicast_send_query+0x216/0x3a0 net/bridge/br_multicast.c:988 net/bridge/br_multicast.c:988
 br_multicast_query_expired net/bridge/br_multicast.c:1942 [inline]
 br_multicast_query_expired net/bridge/br_multicast.c:1942 [inline] net/bridge/br_multicast.c:1958
 br_ip6_multicast_query_expired+0xdc/0x110 net/bridge/br_multicast.c:1958 net/bridge/br_multicast.c:1958
 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 kernel/time/timer.c:1338
 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 kernel/time/timer.c:1375
 __run_timers kernel/time/timer.c:1696 [inline]
 __run_timers kernel/time/timer.c:1696 [inline] kernel/time/timer.c:1709
 run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 kernel/time/timer.c:1709
 __do_softirq+0x265/0x980 kernel/softirq.c:292 kernel/softirq.c:292
 run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 kernel/softirq.c:653
 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:164 kernel/smpboot.c:164
 kthread+0x33f/0x460 kernel/kthread.c:259 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 arch/x86/entry/entry_64.S:415
----------------
Code disassembly (best guess):
   0:	89 ea                	mov    %ebp,%edx
   2:	48 89 ee             	mov    %rbp,%rsi
   5:	4c 89 e7             	mov    %r12,%rdi
   8:	e8 da ee ff ff       	callq  0xffffeee7
   d:	f6 c7 02             	test   $0x2,%bh
  10:	74 ca                	je     0xffffffdc
  12:	e8 20 74 cf ff       	callq  0xffcf7437
  17:	48 83 3d 60 4d 59 08 	cmpq   $0x0,0x8594d60(%rip)        # 0x8594d7f
  1e:	00
  1f:	0f 84 eb 00 00 00    	je     0x110
  25:	48 89 df             	mov    %rbx,%rdi
  28:	57                   	push   %rdi
  29:	9d                   	popfq
* 2a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1) <-- trapping instruction
  2f:	5b                   	pop    %rbx
  30:	5d                   	pop    %rbp
  31:	41 5c                	pop    %r12
  33:	41 5d                	pop    %r13
  35:	c3                   	retq
  36:	65 8b 05 ea 4b 69 7e 	mov    %gs:0x7e694bea(%rip),%eax        # 0x7e694c27
  3d:	83 f8 07             	cmp    $0x7,%eax
----------------
Code disassembly (best guess):
   0:	89 ea                	mov    %ebp,%edx
   2:	48 89 ee             	mov    %rbp,%rsi
   5:	4c 89 e7             	mov    %r12,%rdi
   8:	e8 da ee ff ff       	callq  0xffffeee7
   d:	f6 c7 02             	test   $0x2,%bh
  10:	74 ca                	je     0xffffffdc
  12:	e8 20 74 cf ff       	callq  0xffcf7437
  17:	48 83 3d 60 4d 59 08 	cmpq   $0x0,0x8594d60(%rip)        # 0x8594d7f
  1e:	00
  1f:	0f 84 eb 00 00 00    	je     0x110
  25:	48 89 df             	mov    %rbx,%rdi
  28:	57                   	push   %rdi
  29:	9d                   	popfq
* 2a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1) <-- trapping instruction
  2f:	5b                   	pop    %rbx
  30:	5d                   	pop    %rbp
  31:	41 5c                	pop    %r12
  33:	41 5d                	pop    %r13
  35:	c3                   	retq
  36:	65 8b 05 ea 4b 69 7e 	mov    %gs:0x7e694bea(%rip),%eax        # 0x7e694c27
  3d:	83 f8 07             	cmp    $0x7,%eax