| TITLE: INFO: rcu detected stall in ext4_filemap_fault |
| TYPE: HANG |
| |
| [ 2355.201776] INFO: rcu_preempt detected stalls on CPUs/tasks: |
| [ 2355.201784] Tasks blocked on level-0 rcu_node (CPUs 0-1): P2270 |
| [ 2355.201792] (detected by 0, t=10502 jiffies, g=98916, c=98915, q=146) |
| [ 2355.201808] syz-fuzzer R running task 25680 2270 2264 0x00000000 |
| [ 2355.201818] 00000000000008d8 16c3269289c67388 ffff8801db607c20 ffffffff8138d924 |
| [ 2355.201826] ffff8801caf9df00 ffffffff82ea86c0 0000000000000092 dffffc0000000000 |
| [ 2355.201835] ffff8801caf9e308 ffff8801db607c58 ffffffff8139811e 0000000000018263 |
| [ 2355.201836] Call Trace: |
| [ 2355.201852] <IRQ> [<ffffffff8138d924>] sched_show_task+0x378/0x387 |
| [ 2355.201860] [<ffffffff8139811e>] rcu_print_detail_task_stall_rnp+0xbd/0xf9 |
| [ 2355.201868] [<ffffffff8139910c>] rcu_check_callbacks.cold.67+0xa85/0xd20 |
| [ 2355.201876] [<ffffffff81251b3a>] update_process_times+0x3a/0x70 |
| [ 2355.201885] [<ffffffff8127e0fa>] tick_sched_handle.isra.6+0x4a/0xf0 |
| [ 2355.201892] [<ffffffff8127e216>] tick_sched_timer+0x76/0x130 |
| [ 2355.201906] [<ffffffff81253bb0>] __hrtimer_run_queues+0x390/0xfc0 |
| [ 2355.201956] [<ffffffff81256831>] hrtimer_interrupt+0x1b1/0x430 |
| [ 2355.201964] [<ffffffff810897c4>] local_apic_timer_interrupt+0x74/0xa0 |
| [ 2355.201971] [<ffffffff82692b7c>] smp_apic_timer_interrupt+0x7c/0xa0 |
| [ 2355.201978] [<ffffffff82691edd>] apic_timer_interrupt+0x9d/0xb0 |
| [ 2355.201987] <EOI> [<ffffffff81214699>] ? console_unlock+0x659/0xa10 |
| [ 2355.202000] [<ffffffff81214e45>] vprintk_emit+0x3f5/0x830 |
| [ 2355.202006] [<ffffffff812152a8>] vprintk+0x28/0x30 |
| [ 2355.202013] [<ffffffff812152cd>] vprintk_default+0x1d/0x30 |
| [ 2355.202019] [<ffffffff8139632a>] printk+0xaf/0xd7 |
| [ 2355.202042] [<ffffffff8146763e>] dump_header.isra.4+0x617/0x6b5 |
| [ 2355.202050] [<ffffffff814676f7>] oom_kill_process.cold.9+0x1b/0x9b6 |
| [ 2355.202065] [<ffffffff813a9d8e>] out_of_memory+0x48e/0xab0 |
| [ 2355.202092] [<ffffffff813b600a>] __alloc_pages_nodemask+0x122a/0x1430 |
| [ 2355.202166] [<ffffffff813a5a22>] filemap_fault+0x802/0xbe0 |
| [ 2355.202173] [<ffffffff81634781>] ext4_filemap_fault+0x71/0xa0 |
| [ 2355.202181] [<ffffffff8140dee7>] __do_fault+0x1d7/0x360 |
| [ 2355.202203] [<ffffffff8141abd9>] handle_mm_fault+0x1cd9/0x2f30 |
| [ 2355.202231] [<ffffffff810a9571>] __do_page_fault+0x291/0x7e0 |
| [ 2355.202238] [<ffffffff810a9b17>] do_page_fault+0x27/0x30 |
| [ 2355.202244] [<ffffffff82691775>] page_fault+0x25/0x30 |
| [ 2355.202257] syz-fuzzer R running task 25680 2270 2264 0x00000000 |
| [ 2355.202266] 00000000000008d8 16c3269289c67388 ffff8801db607c20 ffffffff8138d924 |
| [ 2355.202274] ffff8801caf9df00 ffffffff82ea86c0 0000000000000092 dffffc0000000000 |
| [ 2355.202283] ffff8801caf9e308 ffff8801db607c58 ffffffff8139811e ffffffff82ea8940 |
