------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 0 PID: 16171 at lib/refcount.c:31 refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31 Modules linked in: CPU: 0 PID: 16171 Comm: syz-executor.4 Not tainted 5.12.0-rc4-next-20210326-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 5b 7f e6 09 31 ff 89 de e8 7d b6 a7 fd 84 db 75 e0 e8 c4 af a7 fd 48 c7 c7 60 3e c2 89 c6 05 3b 7f e6 09 01 e8 04 00 fe 04 <0f> 0b eb c4 e8 a8 af a7 fd 0f b6 1d 2a 7f e6 09 31 ff 89 de e8 48 RSP: 0000:ffffc90000007df0 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88807300b900 RSI: ffffffff815c3fd5 RDI: fffff52000000fb0 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815bd77e R11: 0000000000000000 R12: ffff888143f4a000 R13: ffff888143f4a568 R14: 0000000000000001 R15: ffff88801a557de0 FS: 0000000001b21400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000d58 CR3: 000000001218e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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+0x7ab/0x13b0 kernel/rcu/tree.c:2794 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559 invoke_softirq kernel/softirq.c:433 [inline] __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:lock_is_held_type+0xfd/0x140 kernel/locking/lockdep.c:5560 Code: 00 00 b8 ff ff ff ff 65 0f c1 05 8e 86 f6 76 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48 RSP: 0000:ffffc90001b9fc80 EFLAGS: 00000292 RAX: 0000000000000046 RBX: 0000000000000003 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffffff8bf752e0 R08: 0000000000000000 R09: ffffffff8dc74d4f R10: fffffbfff1b8e9a9 R11: 000000000000003f R12: ffff88807300b900 R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88807300c348 lock_is_held include/linux/lockdep.h:283 [inline] rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125 trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x5e9/0x740 kernel/locking/lockdep.c:5483 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:359 [inline] huge_pte_lock include/linux/hugetlb.h:1037 [inline] hugetlb_no_page mm/hugetlb.c:4410 [inline] hugetlb_fault+0x15b6/0x2440 mm/hugetlb.c:4602 handle_mm_fault+0x64c/0x7e0 mm/memory.c:4579 do_user_addr_fault+0x483/0x1210 arch/x86/mm/fault.c:1390 handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1531 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:577 RIP: 0033:0x4079fa Code: c1 c0 08 0f b7 c0 48 8b 54 24 10 66 89 02 e9 60 fd ff ff 48 8b 04 24 48 85 c0 0f 85 6f fe ff ff 48 8b 44 24 10 0f b6 54 24 18 <88> 10 e9 42 fd ff ff 48 8b 54 24 08 48 8d 35 37 74 0b 00 48 8d 3d RSP: 002b:00007ffc5ccf6370 EFLAGS: 00010246 RAX: 0000000020000d58 RBX: 0000000000970000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001b212f0 RBP: 00007ffc5ccf6468 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffc5ccf6468 R13: 00007ffc5ccf64b0 R14: 000000000056bf60 R15: 000000000004c849