netlink: 5 bytes leftover after parsing attributes in process `syz-executor1'.
INFO: rcu_sched self-detected stall on CPU
INFO: rcu_sched detected stalls on CPUs/tasks:
	0-....: (125000 ticks this GP) idle=2ee/140000000000001/0 softirq=85913/85913 fqs=31232 
	(detected by 1, t=125002 jiffies, g=48049, c=48048, q=257)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 23558 Comm: syz-executor5 Not tainted 4.15.0-rc1+ #201
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: 00000000c97cc1eb task.stack: 00000000b117fe26
RIP: 0010:inb arch/x86/include/asm/io.h:348 [inline]
RIP: 0010:io_serial_in+0x6b/0x90 drivers/tty/serial/8250/8250_port.c:434
RSP: 0018:ffff8801db406ff8 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000005 RDI: ffffffff87ced9c0
RBP: ffff8801db407008 R08: 0000000000000002 R09: 000000000000000c
R10: 0000000000000000 R11: ffffffff87489d60 R12: ffffffff87ced980
R13: 0000000000000020 R14: fffffbfff0f9db77 R15: fffffbfff0f9db3a
FS:  00007ff3466ae700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020ddb000 CR3: 00000001cd1aa000 CR4: 00000000001406f0
Call Trace:
 <IRQ>
 serial_in drivers/tty/serial/8250/8250.h:111 [inline]
 wait_for_xmitr+0x93/0x1e0 drivers/tty/serial/8250/8250_port.c:2033
 serial8250_console_putchar+0x1f/0x60 drivers/tty/serial/8250/8250_port.c:3170
 uart_console_write+0xac/0xe0 drivers/tty/serial/serial_core.c:1858
 serial8250_console_write+0x647/0xa20 drivers/tty/serial/8250/8250_port.c:3236
 univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:590
 call_console_drivers kernel/printk/printk.c:1574 [inline]
 console_unlock+0x788/0xd80 kernel/printk/printk.c:2233
 vprintk_emit+0x4ad/0x590 kernel/printk/printk.c:1757
 vprintk_default+0x28/0x30 kernel/printk/printk.c:1796
 vprintk_func+0x57/0xc0 kernel/printk/printk_safe.c:379
 printk+0xaa/0xca kernel/printk/printk.c:1829
 print_cpu_stall_info_begin kernel/rcu/tree_plugin.h:1657 [inline]
 print_cpu_stall kernel/rcu/tree.c:1594 [inline]
 check_cpu_stall.isra.64+0x845/0x15b0 kernel/rcu/tree.c:1676
 __rcu_pending kernel/rcu/tree.c:3440 [inline]
 rcu_pending kernel/rcu/tree.c:3502 [inline]
 rcu_check_callbacks+0x256/0xd00 kernel/rcu/tree.c:2842
 update_process_times+0x30/0x60 kernel/time/timer.c:1630
 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:162
 tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1166
 __run_hrtimer kernel/time/hrtimer.c:1211 [inline]
 __hrtimer_run_queues+0x349/0xe10 kernel/time/hrtimer.c:1275
 hrtimer_interrupt+0x1d4/0x5f0 kernel/time/hrtimer.c:1309
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
 smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050
 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:795
 </IRQ>
RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x20/0x50 kernel/kcov.c:101
RSP: 0018:ffff8801d170fa90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff11
RAX: ffff8801cb25e400 RBX: dffffc0000000000 RCX: ffffffff838b0965
RDX: 0000000000000000 RSI: ffffc90002af4000 RDI: ffff8801c615fc18
RBP: ffff8801d170fa90 R08: ffffffff85f445c0 R09: 1ffff1003a2e1efd
R10: ffff8801cb25e400 R11: 0000000000000001 R12: ffff8801cfadca38
R13: ffff8801cfe30d80 R14: ffff8801dac45940 R15: ffff8801cfe30ed8
 is_loop_device drivers/block/loop.c:691 [inline]
 loop_set_fd drivers/block/loop.c:879 [inline]
 lo_ioctl+0x535/0x1b90 drivers/block/loop.c:1358
 __blkdev_driver_ioctl block/ioctl.c:303 [inline]
 blkdev_ioctl+0x1759/0x1e00 block/ioctl.c:601
 block_ioctl+0xea/0x130 fs/block_dev.c:1860
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x4529d9
RSP: 002b:00007ff3466adc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 00000000004529d9
RDX: 0000000000000018 RSI: 0000000000004c00 RDI: 0000000000000017
RBP: 000000000000005b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ed928
R13: 00000000ffffffff R14: 00007ff3466ae6d4 R15: 0000000000000000
Code: 24 d9 00 00 00 49 8d 7c 24 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 d3 e3 80 3c 02 00 75 17 41 03 5c 24 40 89 da ec <5b> 0f b6 c0 41 5c 5d c3 e8 18 d0 18 ff eb c2 e8 71 d0 18 ff eb 
	0-....: (125000 ticks this GP) idle=2ee/140000000000001/0 softirq=85913/85913 fqs=31396 
	 (t=125659 jiffies g=48049 c=48048 q=257)
NMI backtrace for cpu 0
CPU: 0 PID: 23558 Comm: syz-executor5 Not tainted 4.15.0-rc1+ #201
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103
 nmi_trigger_cpumask_backtrace+0x122/0x180 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:156 [inline]
 rcu_dump_cpu_stacks+0x186/0x1d5 kernel/rcu/tree.c:1459
 print_cpu_stall kernel/rcu/tree.c:1608 [inline]
 check_cpu_stall.isra.64+0xbb8/0x15b0 kernel/rcu/tree.c:1676
 __rcu_pending kernel/rcu/tree.c:3440 [inline]
 rcu_pending kernel/rcu/tree.c:3502 [inline]
 rcu_check_callbacks+0x256/0xd00 kernel/rcu/tree.c:2842
 update_process_times+0x30/0x60 kernel/time/timer.c:1630
 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:162
 tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1166
 __run_hrtimer kernel/time/hrtimer.c:1211 [inline]
 __hrtimer_run_queues+0x349/0xe10 kernel/time/hrtimer.c:1275
 hrtimer_interrupt+0x1d4/0x5f0 kernel/time/hrtimer.c:1309
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
 smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050
 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:795
 </IRQ>
RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x20/0x50 kernel/kcov.c:101
RSP: 0018:ffff8801d170fa90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff11
RAX: ffff8801cb25e400 RBX: dffffc0000000000 RCX: ffffffff838b0965
RDX: 0000000000000000 RSI: ffffc90002af4000 RDI: ffff8801c615fc18
RBP: ffff8801d170fa90 R08: ffffffff85f445c0 R09: 1ffff1003a2e1efd
R10: ffff8801cb25e400 R11: 0000000000000001 R12: ffff8801cfadca38
R13: ffff8801cfe30d80 R14: ffff8801dac45940 R15: ffff8801cfe30ed8
 is_loop_device drivers/block/loop.c:691 [inline]
 loop_set_fd drivers/block/loop.c:879 [inline]
 lo_ioctl+0x535/0x1b90 drivers/block/loop.c:1358
 __blkdev_driver_ioctl block/ioctl.c:303 [inline]
 blkdev_ioctl+0x1759/0x1e00 block/ioctl.c:601
 block_ioctl+0xea/0x130 fs/block_dev.c:1860
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:686
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x4529d9
RSP: 002b:00007ff3466adc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 00000000004529d9
RDX: 0000000000000018 RSI: 0000000000004c00 RDI: 0000000000000017
RBP: 000000000000005b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ed928
R13: 00000000ffffffff R14: 00007ff3466ae6d4 R15: 0000000000000000