| TITLE: INFO: rcu detected stall in ext4_file_write_iter |
| |
| [ 587.513972] rcu: INFO: rcu_sched self-detected stall on CPU |
| [ 587.520042] rcu: 0-....: (105000 ticks this GP) idle=76a/1/0x4000000000000002 softirq=144952/144952 fqs=26032 |
| [ 587.530723] rcu: (t=105010 jiffies g=334085 q=1885) |
| [ 587.535924] NMI backtrace for cpu 0 |
| [ 587.539556] CPU: 0 PID: 30128 Comm: syz-executor6 Not tainted 4.18.0+ #197 |
| [ 587.546568] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 |
| [ 587.555920] Call Trace: |
| [ 587.558509] <IRQ> |
| [ 587.560674] dump_stack+0x1c9/0x2b4 |
| [ 587.578675] nmi_cpu_backtrace.cold.3+0x48/0x88 |
| [ 587.588548] nmi_trigger_cpumask_backtrace+0x151/0x192 |
| [ 587.593830] arch_trigger_cpumask_backtrace+0x14/0x20 |
| [ 587.599018] rcu_dump_cpu_stacks+0x175/0x1c2 |
| [ 587.608455] print_cpu_stall.cold.78+0x2fb/0x59c |
| [ 587.638910] rcu_check_callbacks+0xd93/0x1660 |
| [ 587.732161] update_process_times+0x2d/0x70 |
| [ 587.736486] tick_sched_handle+0x9f/0x180 |
| [ 587.740649] tick_sched_timer+0x45/0x130 |
| [ 587.744711] __hrtimer_run_queues+0x3eb/0x10c0 |
| [ 587.785214] hrtimer_interrupt+0x2f3/0x750 |
| [ 587.789483] smp_apic_timer_interrupt+0x16d/0x730 |
| [ 587.817071] apic_timer_interrupt+0xf/0x20 |
| [ 587.821308] </IRQ> |
| [ 587.823563] RIP: 0010:lock_acquire+0x25f/0x540 |
| [ 587.847050] RSP: 0018:ffff8801912ee5e8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 |
| [ 587.854764] RAX: dffffc0000000000 RBX: 1ffff1003225dcc2 RCX: 0000000000000000 |
| [ 587.862032] RDX: 1ffffffff0fe374d RSI: 0000000000000000 RDI: 0000000000000282 |
| [ 587.869301] RBP: ffff8801912ee6d8 R08: 0000000000000008 R09: 0000000000000004 |
| [ 587.876569] R10: ffff8801bb228d58 R11: 5f54006f34535a0e R12: ffff8801bb228480 |
| [ 587.883836] R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000 |
| [ 587.903344] balance_dirty_pages_ratelimited+0x187f/0x2200 |
| [ 587.991035] generic_perform_write+0x551/0x6c0 |
| [ 588.027011] __generic_file_write_iter+0x26e/0x630 |
| [ 588.031952] ext4_file_write_iter+0x390/0x1450 |
| [ 588.082118] __vfs_write+0x6af/0x9d0 |
| [ 588.102237] __kernel_write+0x10c/0x380 |
| [ 588.106225] do_acct_process+0x1148/0x1660 |
| [ 588.118181] acct_process+0x6b9/0x87d |
| [ 588.151604] do_exit+0x1afd/0x2760 |
| [ 588.255303] do_group_exit+0x177/0x440 |
| [ 588.277377] get_signal+0x88e/0x1970 |
| [ 588.310755] do_signal+0x9c/0x21c0 |
| [ 588.350143] exit_to_usermode_loop+0x2e5/0x380 |
| [ 588.365138] do_syscall_64+0x6be/0x820 |
| [ 588.397707] entry_SYSCALL_64_after_hwframe+0x49/0xbe |
| [ 588.402900] RIP: 0033:0x457089 |
| [ 588.425533] RSP: 002b:00007fe66d9d4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 |
| [ 588.433254] RAX: 0000000000000000 RBX: 00007fe66d9d56d4 RCX: 0000000000457089 |
| [ 588.440538] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 |
| [ 588.447815] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 |
| [ 588.455086] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff |
| [ 588.462371] R13: 00000000004cb460 R14: 00000000004ee072 R15: 0000000000000000 |
