binder: 1225:1230 transaction failed 29201/-22, size 24-8 line 2755
INFO: rcu_sched self-detected stall on CPU
INFO: rcu_sched detected stalls on CPUs/tasks:
	0-....: (125000 ticks this GP) idle=196/140000000000001/0 softirq=123858/123858 fqs=31228 
	(detected by 1, t=125002 jiffies, g=66269, c=66268, q=1304)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1178 Comm: syz-executor4 Not tainted 4.15.0-rc1+ #201
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: 00000000335da36f task.stack: 0000000001408b18
RIP: 0010:rdtsc arch/x86/include/asm/msr.h:191 [inline]
RIP: 0010:rdtsc_ordered arch/x86/include/asm/msr.h:219 [inline]
RIP: 0010:delay_tsc+0x26/0x70 arch/x86/lib/delay.c:61
RSP: 0018:ffff8801db406ff0 EFLAGS: 00000046
RAX: 00000000ba63f237 RBX: ffffffff87ced980 RCX: 000000b8ba63ecb5
RDX: 00000000000000b8 RSI: 0000000000000000 RDI: 00000000000008fd
RBP: ffff8801db406ff0 R08: 1ffffffff0d2aca7 R09: 000000000000000c
R10: 0000000000000000 R11: ffffffff87489d60 R12: 0000000000002708
R13: 0000000000000020 R14: fffffbfff0f9db77 R15: fffffbfff0f9db3a
FS:  00007f9b698c0700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b9bc22000 CR3: 0000000192dc1000 CR4: 00000000001406f0
DR0: 0000000020001000 DR1: 0000000020001000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __delay arch/x86/lib/delay.c:161 [inline]
 __const_udelay+0x5b/0x70 arch/x86/lib/delay.c:175
 wait_for_xmitr+0x6f/0x1e0 drivers/tty/serial/8250/8250_port.c:2041
 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:loop_set_fd drivers/block/loop.c:890 [inline]
RIP: 0010:lo_ioctl+0x648/0x1b90 drivers/block/loop.c:1358
RSP: 0018:ffff8801c76c7aa0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff11
RAX: 0000000000010000 RBX: dffffc0000000000 RCX: ffffffff838b0a78
RDX: 0000000000010000 RSI: ffffc900036fc000 RDI: ffff8801d4ec3c90
RBP: ffff8801c76c7b18 R08: 0000000000000001 R09: 1ffff10038ed8efd
R10: ffff8801907cc240 R11: 0000000000000001 R12: ffff8801d4ec3b40
R13: ffff8801cd89cd80 R14: ffff8801d6a40140 R15: ffff8801cd89ced8
 __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:00007f9b698bfc58 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: 00007f9b698c06d4 R15: 0000000000000000
Code: 00 00 00 00 00 55 65 ff 05 d8 23 ed 7a 48 89 e5 65 8b 35 2e f0 ec 7a 0f ae e8 0f 31 48 c1 e2 20 48 89 d1 48 09 c1 0f ae e8 0f 31 <48> c1 e2 20 48 09 d0 48 89 c2 48 29 ca 48 39 fa 73 25 65 ff 0d 
	0-....: (125000 ticks this GP) idle=196/140000000000001/0 softirq=123858/123858 fqs=31398 
	 (t=125688 jiffies g=66269 c=66268 q=1304)
NMI backtrace for cpu 0
CPU: 0 PID: 1178 Comm: syz-executor4 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:loop_set_fd drivers/block/loop.c:890 [inline]
RIP: 0010:lo_ioctl+0x648/0x1b90 drivers/block/loop.c:1358
RSP: 0018:ffff8801c76c7aa0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff11
RAX: 0000000000010000 RBX: dffffc0000000000 RCX: ffffffff838b0a78
RDX: 0000000000010000 RSI: ffffc900036fc000 RDI: ffff8801d4ec3c90
RBP: ffff8801c76c7b18 R08: 0000000000000001 R09: 1ffff10038ed8efd
R10: ffff8801907cc240 R11: 0000000000000001 R12: ffff8801d4ec3b40
R13: ffff8801cd89cd80 R14: ffff8801d6a40140 R15: ffff8801cd89ced8
 __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:00007f9b698bfc58 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: 00007f9b698c06d4 R15: 0000000000000000