------------[ cut here ]------------
WARNING: CPU: 1 PID: 92 at net/ipv4/ipmr.c:2302 ip_mr_output+0xbb1/0xe70 net/ipv4/ipmr.c:2302
Modules linked in:
CPU: 1 UID: 0 PID: 92 Comm: kworker/1:2 Not tainted 6.16.0-rc2-syzkaller-00675-g8dacfd92dbef #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events drain_vmap_area_work
RIP: 0010:ip_mr_output+0xbb1/0xe70 net/ipv4/ipmr.c:2302
Code: df e9 63 f6 ff ff e8 2e 0c c6 f7 48 8b 74 24 18 45 31 f6 31 ff ba 02 00 00 00 e8 ca 02 4c ff e9 45 f6 ff ff e8 10 0c c6 f7 90 <0f> 0b 90 e9 94 f5 ff ff e8 02 0c c6 f7 90 0f 0b 90 42 80 3c 2b 00
RSP: 0018:ffffc90000a08900 EFLAGS: 00010246
RAX: ffffffff89fa5040 RBX: ffff88805a3a6500 RCX: ffff88801e3d5a00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a08a10 R08: ffff88801e3d5a00 R09: 0000000000000004
R10: 0000000000000003 R11: ffffffff89fa4490 R12: 0000000000000010
R13: dffffc0000000000 R14: ffff88807e6f9700 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125d4d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000300 CR3: 00000000247b8000 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:rcu_preempt_read_exit kernel/rcu/tree_plugin.h:398 [inline]
RIP: 0010:__rcu_read_unlock+0x37/0xe0 kernel/rcu/tree_plugin.h:435
Code: 49 bf 00 00 00 00 00 fc ff df 65 48 8b 3c 25 08 30 9d 92 48 8d 9f 44 04 00 00 49 89 dc 49 c1 ec 03 43 0f b6 04 3c 84 c0 75 4f <ff> 0b 75 1d 4c 8d b7 48 04 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04
RSP: 0018:ffffc9000216f348 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88801e3d5e44 RCX: faf073c4afd23f00
RDX: 0000000000000003 RSI: ffffffff8db71bc9 RDI: ffff88801e3d5a00
RBP: dffffc0000000000 R08: ffffc9000216fe70 R09: 0000000000000000
R10: ffffc9000216f498 R11: fffff5200042de95 R12: 1ffff11003c7abc8
R13: ffffc90002168000 R14: ffffc9000216f448 R15: dffffc0000000000
 rcu_read_unlock include/linux/rcupdate.h:873 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0x19ae/0x2390 arch/x86/kernel/unwind_orc.c:680
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2381 [inline]
 slab_free mm/slub.c:4643 [inline]
 kmem_cache_free+0x18f/0x400 mm/slub.c:4745
 __merge_or_add_vmap_area mm/vmalloc.c:1451 [inline]
 merge_or_add_vmap_area mm/vmalloc.c:1501 [inline]
 decay_va_pool_node+0x724/0xdb0 mm/vmalloc.c:2210
 __purge_vmap_area_lazy+0x15d/0xb40 mm/vmalloc.c:2307
 drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2382
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
   7:	fc ff df
   a:	65 48 8b 3c 25 08 30 	mov    %gs:0xffffffff929d3008,%rdi
  11:	9d 92
  13:	48 8d 9f 44 04 00 00 	lea    0x444(%rdi),%rbx
  1a:	49 89 dc             	mov    %rbx,%r12
  1d:	49 c1 ec 03          	shr    $0x3,%r12
  21:	43 0f b6 04 3c       	movzbl (%r12,%r15,1),%eax
  26:	84 c0                	test   %al,%al
  28:	75 4f                	jne    0x79
* 2a:	ff 0b                	decl   (%rbx) <-- trapping instruction
  2c:	75 1d                	jne    0x4b
  2e:	4c 8d b7 48 04 00 00 	lea    0x448(%rdi),%r14
  35:	4c 89 f0             	mov    %r14,%rax
  38:	48 c1 e8 03          	shr    $0x3,%rax
  3c:	42                   	rex.X
  3d:	0f                   	.byte 0xf
  3e:	b6 04                	mov    $0x4,%dh