------------[ cut here ]------------
WARNING: CPU: 0 PID: 7902 at net/ipv4/ipmr.c:2302 ip_mr_output+0xbb1/0xe70 net/ipv4/ipmr.c:2302
Modules linked in:
CPU: 0 UID: 0 PID: 7902 Comm: dhcpcd-run-hook Not tainted 6.16.0-rc1-syzkaller-00482-gafc783fa0aab #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ip_mr_output+0xbb1/0xe70 net/ipv4/ipmr.c:2302
Code: df e9 63 f6 ff ff e8 fe 71 c6 f7 48 8b 74 24 18 45 31 f6 31 ff ba 02 00 00 00 e8 3a 11 4c ff e9 45 f6 ff ff e8 e0 71 c6 f7 90 <0f> 0b 90 e9 94 f5 ff ff e8 d2 71 c6 f7 90 0f 0b 90 42 80 3c 2b 00
RSP: 0018:ffffc90000007900 EFLAGS: 00010246
RAX: ffffffff89f9ed10 RBX: ffff888030fba140 RCX: ffff88807de95a00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007a10 R08: ffff88807de95a00 R09: 0000000000000004
R10: 0000000000000003 R11: ffffffff89f9e160 R12: 0000000000000010
R13: dffffc0000000000 R14: ffff8880561b1e00 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125c52000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcd5b7fffe8 CR3: 000000007817e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 igmp_send_report+0x89e/0xdb0 net/ipv4/igmp.c:799
 igmp_timer_expire+0x204/0x510 net/ipv4/igmp.c:-1
 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
 expire_timers kernel/time/timer.c:1798 [inline]
 __run_timers kernel/time/timer.c:2372 [inline]
 __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384
 run_timer_base kernel/time/timer.c:2393 [inline]
 run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 cb 4e 5f f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> d3 3a 28 f6 65 8b 05 bc 43 34 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc9000f7ef140 EFLAGS: 00000206
RAX: 53850684d9d88500 RBX: 0000000000000a06 RCX: 53850684d9d88500
RDX: 0000000000000006 RSI: ffffffff8d982dfc RDI: 0000000000000001
RBP: ffffc9000f7ef1c0 R08: ffffffff8fa10ff7 R09: 1ffffffff1f421fe
R10: dffffc0000000000 R11: fffffbfff1f421ff R12: dffffc0000000000
R13: ffff888033354900 R14: ffffffff99c9d928 R15: 1ffff92001efde28
 __debug_check_no_obj_freed lib/debugobjects.c:1108 [inline]
 debug_check_no_obj_freed+0x451/0x470 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2312 [inline]
 slab_free mm/slub.c:4643 [inline]
 kmem_cache_free+0x113/0x400 mm/slub.c:4745
 mt_free_one lib/maple_tree.c:186 [inline]
 mas_destroy+0x1680/0x1c70 lib/maple_tree.c:5589
 mas_store_prealloc+0xb69/0xf60 lib/maple_tree.c:5508
 vma_iter_store_new mm/vma.h:462 [inline]
 __mmap_new_vma mm/vma.c:2497 [inline]
 __mmap_region mm/vma.c:2636 [inline]
 mmap_region+0x1485/0x1f30 mm/vma.c:2706
 do_mmap+0xc45/0x10d0 mm/mmap.c:561
 vm_mmap_pgoff+0x31b/0x4c0 mm/util.c:579
 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:607
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcd5bad1242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007ffe0c2f4d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcd5bad1242
RDX: 0000000000000001 RSI: 0000000000006050 RDI: 0000000000000000
RBP: 0000000000000802 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000802 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcd5baa6050 R14: 00007ffe0c2f51c0 R15: 00000fffc185e9b4
 </TASK>
----------------
Code disassembly (best guess):
   0:	74 05                	je     0x7
   2:	e8 cb 4e 5f f6       	call   0xf65f4ed2
   7:	48 c7 44 24 20 00 00 	movq   $0x0,0x20(%rsp)
   e:	00 00
  10:	9c                   	pushf
  11:	8f 44 24 20          	pop    0x20(%rsp)
  15:	f6 44 24 21 02       	testb  $0x2,0x21(%rsp)
  1a:	75 4f                	jne    0x6b
  1c:	f7 c3 00 02 00 00    	test   $0x200,%ebx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 d3 3a 28 f6       	call   0xf6283b02 <-- trapping instruction
  2f:	65 8b 05 bc 43 34 07 	mov    %gs:0x73443bc(%rip),%eax        # 0x73443f2
  36:	85 c0                	test   %eax,%eax
  38:	74 40                	je     0x7a
  3a:	48                   	rex.W
  3b:	c7                   	.byte 0xc7
  3c:	04 24                	add    $0x24,%al
  3e:	0e                   	(bad)
  3f:	36                   	ss