------------[ cut here ]------------
refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 1 PID: 20794 at lib/refcount.c:31 refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31
Modules linked in:
CPU: 1 PID: 20794 Comm: syz-executor.5 Not tainted 5.16.0-rc1-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 3a 48 a2 09 31 ff 89 de e8 ed ef 9c fd 84 db 75 e0 e8 04 ec 9c fd 48 c7 c7 e0 d4 04 8a c6 05 1a 48 a2 09 01 e8 7b 14 33 05 <0f> 0b eb c4 e8 e8 eb 9c fd 0f b6 1d 09 48 a2 09 31 ff 89 de e8 b8
RSP: 0018:ffffc90000dc0df0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88803997ba00 RSI: ffffffff815f0ad8 RDI: fffff520001b81b0
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815ea87e R11: 0000000000000000 R12: 0000000000000001
R13: ffff88807d1bc5b0 R14: 0000000000000003 R15: ffff88807adaade8
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556ef1708 CR3: 0000000037917000 CR4: 00000000003506e0
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:4166 [inline]
 in_dev_finish_destroy+0x160/0x1b0 net/ipv4/devinet.c:246
 in_dev_put include/linux/inetdevice.h:276 [inline]
 in_dev_rcu_put+0x83/0xb0 net/ipv4/devinet.c:303
 rcu_do_batch kernel/rcu/tree.c:2506 [inline]
 rcu_core+0x7ab/0x1470 kernel/rcu/tree.c:2741
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:mm_update_next_owner+0x44e/0x7a0 kernel/exit.c:429
Code: fb ff ff 48 89 f8 48 c1 e8 03 0f b6 14 18 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b5 02 00 00 44 8b b5 6c fb ff ff <31> ff 41 81 e6 00 00 20 00 44 89 f6 e8 d1 55 31 00 45 85 f6 0f 85
RSP: 0018:ffffc90004107b38 EFLAGS: 00000246
RAX: 0000000000000007 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81464420 RDI: ffff88803594572c
RBP: ffff888035945bc0 R08: 0000000000000000 R09: ffffffff8b80a083
R10: ffffffff8146445f R11: 0000000000000000 R12: ffff8880342f9500
R13: ffff888035945700 R14: 0000000000404140 R15: ffff888032be86d0
 exit_mm kernel/exit.c:506 [inline]
 do_exit+0xb1f/0x2b40 kernel/exit.c:819
 do_group_exit+0x125/0x310 kernel/exit.c:929
 get_signal+0x47d/0x2220 kernel/signal.c:2830
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f448a731ae9
Code: Unable to access opcode bytes at RIP 0x7f448a731abf.
RSP: 002b:00007f4487ca7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffa3 RBX: 00007f448a844f60 RCX: 00007f448a731ae9
RDX: 0000000000000001 RSI: 0000000000000003 RDI: 0000000000000010
RBP: 00007f448a78bf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe52d5340f R14: 00007f4487ca7300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	ff 48 89             	decl   -0x77(%rax)
   3:	f8                   	clc
   4:	48 c1 e8 03          	shr    $0x3,%rax
   8:	0f b6 14 18          	movzbl (%rax,%rbx,1),%edx
   c:	48 89 f8             	mov    %rdi,%rax
   f:	83 e0 07             	and    $0x7,%eax
  12:	83 c0 03             	add    $0x3,%eax
  15:	38 d0                	cmp    %dl,%al
  17:	7c 08                	jl     0x21
  19:	84 d2                	test   %dl,%dl
  1b:	0f 85 b5 02 00 00    	jne    0x2d6
  21:	44 8b b5 6c fb ff ff 	mov    -0x494(%rbp),%r14d
* 28:	31 ff                	xor    %edi,%edi <-- trapping instruction
  2a:	41 81 e6 00 00 20 00 	and    $0x200000,%r14d
  31:	44 89 f6             	mov    %r14d,%esi
  34:	e8 d1 55 31 00       	callq  0x31560a
  39:	45 85 f6             	test   %r14d,%r14d
  3c:	0f                   	.byte 0xf
  3d:	85                   	.byte 0x85