| TITLE: INFO: rcu detected stall in lo_compat_ioctl |
| TYPE: HANG |
| |
| [ 480.801028] INFO: rcu_sched self-detected stall on CPU |
| [ 480.806333] 0-...: (64962 ticks this GP) idle=ff6/140000000000001/0 softirq=6610/6610 fqs=16220 |
| [ 480.815311] (t=65000 jiffies g=3400 c=3399 q=180) |
| [ 480.820444] NMI backtrace for cpu 0 |
| [ 480.824066] CPU: 0 PID: 1932 Comm: syz-executor0 Not tainted 4.14.35+ #15 |
| [ 480.830976] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 |
| [ 480.840409] Call Trace: |
| [ 480.842967] <IRQ> |
| [ 480.845148] dump_stack+0x114/0x1cf |
| [ 480.867367] nmi_cpu_backtrace.cold.2+0x19/0x95 |
| [ 480.881500] nmi_trigger_cpumask_backtrace+0x102/0x143 |
| [ 480.886763] arch_trigger_cpumask_backtrace+0x19/0x20 |
| [ 480.891968] rcu_dump_cpu_stacks+0x177/0x1c4 |
| [ 480.896355] check_cpu_stall.isra.56.cold.75+0x289/0x4b7 |
| [ 480.975100] rcu_check_callbacks+0x2e4/0xe20 |
| [ 481.026890] update_process_times+0x35/0x70 |
| [ 481.031242] tick_sched_handle+0x8a/0x150 |
| [ 481.035364] tick_sched_timer+0x47/0x120 |
| [ 481.043793] __hrtimer_run_queues+0x4ea/0x1150 |
| [ 481.122814] hrtimer_interrupt+0x1b1/0x5b0 |
| [ 481.127041] smp_apic_timer_interrupt+0x1f9/0x870 |
| [ 481.169084] apic_timer_interrupt+0x8e/0xa0 |
| [ 481.173377] </IRQ> |
| [ 481.175588] RIP: 0010:lo_ioctl+0x15e4/0x1b50 |
| [ 481.179969] RSP: 0018:ffff8801cd6efb78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 |
| [ 481.187652] RAX: 1ffff100395975ef RBX: ffff8801cacbadc0 RCX: dffffc0000000000 |
| [ 481.194907] RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff8801cacbaf78 |
| [ 481.202165] RBP: ffff8801cd6efbf0 R08: 0000000000000001 R09: 0000000000000000 |
| [ 481.209417] R10: 0000000000000003 R11: 0000000000000001 R12: ffff8801caf99c40 |
| [ 481.216664] R13: ffff8801db016320 R14: ffff8801d51e4b48 R15: ffff8801db016240 |
| [ 481.236297] lo_compat_ioctl+0xb3/0x140 |
| [ 481.244057] compat_blkdev_ioctl+0x39c/0x1950 |
| [ 481.261895] compat_SyS_ioctl+0x19d/0x3030 |
| [ 481.281601] do_fast_syscall_32+0x3c1/0xbf1 |
| [ 481.317738] entry_SYSENTER_compat+0x84/0x96 |
| [ 481.322121] RIP: 0023:0xf7f71c99 |
| [ 481.325470] RSP: 002b:00000000fff4d7ec EFLAGS: 00000286 ORIG_RAX: 0000000000000036 |
| [ 481.333156] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000004c00 |
| [ 481.340410] RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000000 |
| [ 481.347665] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 |
| [ 481.354909] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 |
| [ 481.362160] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 |
