------------[ cut here ]------------
refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 1 PID: 28393 at lib/refcount.c:31 refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31
Modules linked in:
CPU: 1 PID: 28393 Comm: syz-executor.2 Not tainted 5.12.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31
Code: 1d 6a 5a e8 09 31 ff 89 de e8 8d 1a ab fd 84 db 75 e0 e8 d4 13 ab fd 48 c7 c7 a0 e1 c1 89 c6 05 4a 5a e8 09 01 e8 2e 36 fb 04 <0f> 0b eb c4 e8 b8 13 ab fd 0f b6 1d 39 5a e8 09 31 ff 89 de e8 58
RSP: 0018:ffffc90000dc0e10 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88806f00d4c0 RSI: ffffffff815c51f5 RDI: fffff520001b81b4
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815bdf8e R11: 0000000000000000 R12: ffff888095d10000
R13: ffff888095d10568 R14: ffff8880314455e0 R15: 0000000000000000
FS:  00007f83b605f700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004e4a65 CR3: 00000000231d6000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __refcount_dec include/linux/refcount.h:344 [inline]
 refcount_dec include/linux/refcount.h:359 [inline]
 dev_put include/linux/netdevice.h:4135 [inline]
 in_dev_finish_destroy+0x172/0x1b0 net/ipv4/devinet.c:244
 in_dev_put include/linux/inetdevice.h:265 [inline]
 in_dev_rcu_put+0x83/0xb0 net/ipv4/devinet.c:301
 rcu_do_batch kernel/rcu/tree.c:2559 [inline]
 rcu_core+0x74a/0x12f0 kernel/rcu/tree.c:2794
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:345
 invoke_softirq kernel/softirq.c:221 [inline]
 __irq_exit_rcu kernel/softirq.c:422 [inline]
 irq_exit_rcu+0x134/0x200 kernel/softirq.c:434
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:191
Code: 74 24 10 e8 da 36 52 f8 48 89 ef e8 02 ed 52 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> f3 ba 46 f8 65 8b 05 bc 80 fa 76 85 c0 74 0a 5b 5d c3 e8 60 76
RSP: 0018:ffffc9000f9b76f8 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1f5913a
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000001
RBP: ffff8880109ad850 R08: 0000000000000001 R09: ffffffff8fabb8c7
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b9d30990
R13: ffffea0000dbca08 R14: 000000000000000f R15: 0000000000000000
 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline]
 unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1468 [inline]
 pagevec_lru_move_fn+0x4e0/0x890 mm/swap.c:223
 activate_page mm/swap.c:347 [inline]
 mark_page_accessed+0x13b8/0x1bd0 mm/swap.c:431
 zap_pte_range mm/memory.c:1267 [inline]
 zap_pmd_range mm/memory.c:1374 [inline]
 zap_pud_range mm/memory.c:1403 [inline]
 zap_p4d_range mm/memory.c:1424 [inline]
 unmap_page_range+0xc95/0x2650 mm/memory.c:1445
 unmap_single_vma+0x198/0x300 mm/memory.c:1490
 unmap_vmas+0x16d/0x2f0 mm/memory.c:1522
 unmap_region+0x204/0x350 mm/mmap.c:2674
 __do_munmap+0x661/0x11a0 mm/mmap.c:2906
 do_munmap mm/mmap.c:2917 [inline]
 munmap_vma_range mm/mmap.c:598 [inline]
 mmap_region+0x85a/0x1730 mm/mmap.c:1750
 do_mmap+0xcff/0x11d0 mm/mmap.c:1581
 vm_mmap_pgoff+0x1b7/0x290 mm/util.c:519
 ksys_mmap_pgoff+0xe4/0x620 mm/mmap.c:1632
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466459
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f83b605f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000466459
RDX: 0000000000000003 RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00000000004bf9fb R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 000000000056c0b0
R13: 00007ffd17a8b6cf R14: 00007f83b605f300 R15: 0000000000022000