INFO: rcu detected stall in pipe

rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (10499 ticks this GP) idle=ece/1/0x4000000000000002 softirq=11215/11215 fqs=3 (t=10501 jiffies g=7157 q=236) rcu: rcu_preempt kthread starved for 10496 jiffies! g7157 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 28984 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3385 [inline] __schedule+0x9a0/0xcc0 kernel/sched/core.c:4081 schedule+0x181/0x210 kernel/sched/core.c:4155 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline] rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 0 CPU: 0 PID: 8508 Comm: syz-executor.1 Not tainted 5.5.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fb/0x318 lib/dump_stack.c:118 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x15a/0x220 kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2827 [inline] rcu_sched_clock_irq+0xe25/0x1ad0 kernel/rcu/tree.c:2271 update_process_times+0x12d/0x180 kernel/time/timer.c:1726 tick_sched_handle kernel/time/tick-sched.c:167 [inline] tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 </IRQ> RIP: 0010:mod_memcg_page_state+0x123/0x190 include/linux/memcontrol.h:653 Code: e8 22 8f 6a 00 48 83 3d b2 fd e1 07 00 74 70 e8 c3 26 2e 00 4c 89 ff 57 9d 0f 1f 44 00 00 e8 44 cf 33 00 eb 43 e8 ad 26 2e 00 <eb> 3c e8 d6 cc 33 00 48 c7 c0 68 95 2a 89 48 c1 e8 03 42 80 3c 20 RSP: 0018:ffffc90001e27a40 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffffffff814897d3 RBX: 0000000000000000 RCX: ffff88808bbe6400 RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea0002910e80 RBP: ffffc90001e27a60 R08: 000000000003a728 R09: fffffbfff124248a R10: fffffbfff124248a R11: 0000000000000000 R12: dffffc0000000000 R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff8880975695b8 free_thread_stack+0x168/0x590 kernel/fork.c:280 release_task_stack kernel/fork.c:440 [inline] put_task_stack+0xa3/0x130 kernel/fork.c:451 finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256 context_switch kernel/sched/core.c:3388 [inline] __schedule+0x9a8/0xcc0 kernel/sched/core.c:4081 schedule+0x181/0x210 kernel/sched/core.c:4155 pipe_read+0x951/0xeb0 fs/pipe.c:397 call_read_iter include/linux/fs.h:1896 [inline] new_sync_read fs/read_write.c:414 [inline] __vfs_read+0x59e/0x730 fs/read_write.c:427 vfs_read+0x1dd/0x420 fs/read_write.c:461 ksys_read+0x117/0x220 fs/read_write.c:587 __do_sys_read fs/read_write.c:597 [inline] __se_sys_read fs/read_write.c:595 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:595 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x414a60 Code: 01 f0 ff ff 0f 83 90 1b 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 0d 3a 66 00 00 75 14 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 64 1b 00 00 c3 48 83 ec 08 e8 6a fc ff ff RSP: 002b:00007fff608d88f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000414a60 RDX: 0000000000000038 RSI: 0000000000758040 RDI: 00000000000000f9 RBP: 0000000000717460 R08: 0000000000006000 R09: 0000000000004000 R10: 00007fff608d8290 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff608d8930 R14: 0000000000000003 R15: 00007fff608d8940

Crashes (6):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Manager
2020/01/08 06:18	upstream	ae6088216ce4	6738e0b3	.config	console log	report	ci-upstream-kasan-gce-smack-root
2019/12/04 01:50	upstream	76bb8b05960c	ae13a849	.config	console log	report	ci-upstream-kasan-gce-smack-root
2019/12/04 01:46	upstream	76bb8b05960c	ae13a849	.config	console log	report	ci-upstream-kasan-gce-smack-root
2019/12/03 08:49	upstream	596cf45cbf6e	ab342da3	.config	console log	report	ci-upstream-kasan-gce-smack-root
2019/12/03 07:16	upstream	596cf45cbf6e	ab342da3	.config	console log	report	ci-upstream-kasan-gce-smack-root
2019/12/03 05:43	upstream	596cf45cbf6e	ab342da3	.config	console log	report	ci-upstream-kasan-gce-smack-root

Crashes (6):

Time

Assets (help?)