------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 0 PID: 13070 at lib/refcount.c:31 refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31 Modules linked in: CPU: 0 PID: 13070 Comm: syz-executor.5 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 3b 53 e8 09 31 ff 89 de e8 fd e7 aa fd 84 db 75 e0 e8 44 e1 aa fd 48 c7 c7 a0 e8 c1 89 c6 05 1b 53 e8 09 01 e8 0e d8 fa 04 <0f> 0b eb c4 e8 28 e1 aa fd 0f b6 1d 0a 53 e8 09 31 ff 89 de e8 c8 RSP: 0018:ffffc90000007e10 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88805cf29c40 RSI: ffffffff815c4d85 RDI: fffff52000000fb4 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815bdb1e R11: 0000000000000000 R12: ffff88802cc78000 R13: ffff88802cc78568 R14: ffff888020ca51e0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1d7d39bf80 CR3: 000000004daae000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 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+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 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:324 [inline] RIP: 0010:rcu_is_watching+0x3d/0xc0 kernel/rcu/tree.c:1169 Code: 03 00 83 f8 07 89 c5 0f 87 81 00 00 00 48 8d 3c ed e0 b6 0a 8b 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 5b 48 03 1c ed e0 b6 0a 8b 48 b8 00 00 00 00 00 fc ff df 48 8d RSP: 0018:ffffc90001cff6c0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 00000000000360c0 RCX: 000000003dfd96ca RDX: 1ffffffff16156dc RSI: 0000000000000002 RDI: ffffffff8b0ab6e0 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8fac58a7 R10: fffffbfff1f58b14 R11: 0000000000000000 R12: ffffea0000baed48 R13: 0000000000000000 R14: dffffc0000000000 R15: ffffea0000baed48 rcu_read_lock include/linux/rcupdate.h:657 [inline] lock_page_memcg+0x306/0x510 mm/memcontrol.c:2142 page_remove_rmap+0x25/0x1430 mm/rmap.c:1348 zap_pte_range mm/memory.c:1270 [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+0xe30/0x2650 mm/memory.c:1445 unmap_single_vma+0x198/0x300 mm/memory.c:1490 unmap_vmas+0x16d/0x2f0 mm/memory.c:1522 exit_mmap+0x2a8/0x590 mm/mmap.c:3218 __mmput+0x122/0x470 kernel/fork.c:1092 mmput+0x58/0x60 kernel/fork.c:1113 exit_mm kernel/exit.c:501 [inline] do_exit+0xb0a/0x2a60 kernel/exit.c:812 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x42c/0x2100 kernel/signal.c:2777 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:789 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x466459 Code: Unable to access opcode bytes at RIP 0x46642f. RSP: 002b:00007fea8a1f3188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 000000000000002e RBX: 000000000056c008 RCX: 0000000000466459 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffee8c7930f R14: 00007fea8a1f3300 R15: 0000000000022000