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rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...!: (1 GPs behind) idle=b5d4/1/0x4000000000000000 softirq=152401/152403 fqs=1 (detected by 0, t=10506 jiffies, g=247629, q=68 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 600 Comm: kworker/1:13 Not tainted 6.1.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_freezable_power_ sync_hw_clock RIP: 0010:__kasan_check_read+0x8/0x20 mm/kasan/shadow.c:31 Code: 0f 0b 48 83 c4 60 5b 5d 41 5c c3 48 05 00 80 00 00 48 89 fb 48 39 c7 0f 82 91 9d dd 07 eb e1 0f 1f 00 f3 0f 1e fa 48 8b 0c 24 <89> f6 31 d2 e9 8f f7 ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f RSP: 0018:ffffc900003e8bb0 EFLAGS: 00000002 RAX: 0000000000000001 RBX: 000000000000005a RCX: ffffffff8161d0b3 RDX: 1ffff11005760568 RSI: 0000000000000008 RDI: ffffffff910eba48 RBP: 0000000000000040 R08: 0000000000000000 R09: ffffffff910ebc2f R10: fffffbfff221d785 R11: 0000000000000000 R12: ffff88802bb02b20 R13: ffff88802bb02080 R14: 0000000000000002 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555557da848 CR3: 000000002abe0000 CR4: 00000000003506e0 Call Trace: <IRQ> instrument_atomic_read include/linux/instrumented.h:72 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] hlock_class kernel/locking/lockdep.c:227 [inline] __lock_acquire+0xbc3/0x56d0 kernel/locking/lockdep.c:5052 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x266/0xfb0 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x320/0x790 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline] __sysvec_apic_timer_interrupt+0x180/0x640 arch/x86/kernel/apic/apic.c:1113 sysvec_apic_timer_interrupt+0x92/0xc0 arch/x86/kernel/apic/apic.c:1107 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x3c/0x70 kernel/locking/spinlock.c:194 Code: 74 24 10 e8 f6 fd 71 f7 48 89 ef e8 9e 6a 72 f7 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> cf f3 64 f7 65 8b 05 c8 55 12 76 85 c0 74 0a 5b 5d c3 e8 dc 97 RSP: 0018:ffffc900049c7be8 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff2234936 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff8880b9b2b580 R08: 0000000000000001 R09: ffffffff910ebc2f R10: 0000000000000001 R11: 0000000000000001 R12: 1908a608cd86db00 R13: 000000001dcd6500 R14: 000000006b84ef9e R15: 1908a608741eac00 hrtimer_start include/linux/hrtimer.h:418 [inline] sched_sync_hw_clock kernel/time/ntp.c:519 [inline] sync_hw_clock+0x1fa/0x4d0 kernel/time/ntp.c:660 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK> rcu: rcu_preempt kthread starved for 10500 jiffies! g247629 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:28408 pid:15 ppid:2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5209 [inline] __schedule+0xae9/0x53f0 kernel/sched/core.c:6521 schedule+0xde/0x1b0 kernel/sched/core.c:6597 schedule_timeout+0x14e/0x2a0 kernel/time/timer.c:1935 rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1660 rcu_gp_kthread+0x23a/0x360 kernel/rcu/tree.c:1859 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK> rcu: Stack dump where RCU GP kthread last ran: CPU: 0 PID: 11454 Comm: kworker/u4:0 Not tainted 6.1.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:413 [inline] RIP: 0010:smp_call_function_many_cond+0x43f/0x10a0 kernel/smp.c:987 Code: e6 e8 95 f7 0a 00 45 85 e4 74 48 48 8b 04 24 49 89 c5 83 e0 07 49 c1 ed 03 49 89 c4 4d 01 fd 41 83 c4 03 e8 c3 fa 0a 00 f3 90 <41> 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 4e 0a 00 00 8b 43 08 31 RSP: 0018:ffffc9000408f970 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8880b9b3f120 RCX: 0000000000000000 RDX: ffff88807a334040 RSI: ffffffff817440fd RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003 R13: ffffed1017367e25 R14: 0000000000000001 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f824efabf84 CR3: 000000000c28e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> on_each_cpu_cond_mask+0x5a/0xa0 kernel/smp.c:1155 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1311 [inline] text_poke_bp_batch+0x3f1/0x6b0 arch/x86/kernel/alternative.c:1555 text_poke_flush arch/x86/kernel/alternative.c:1670 [inline] text_poke_flush arch/x86/kernel/alternative.c:1667 [inline] text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1677 arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146 jump_label_update+0x32f/0x410 kernel/jump_label.c:801 static_key_enable_cpuslocked+0x1b5/0x270 kernel/jump_label.c:177 static_key_enable+0x1a/0x20 kernel/jump_label.c:190 toggle_allocation_gate mm/kfence/core.c:800 [inline] toggle_allocation_gate+0x104/0x390 mm/kfence/core.c:792 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK>
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2022/11/28 17:29 | upstream | b7b275e60bcd | 247de55b | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | INFO: rcu detected stall in sync_hw_clock | ||
2022/11/26 22:05 | upstream | 644e9524388a | 74a66371 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-selinux-root | INFO: rcu detected stall in sync_hw_clock | ||
2023/01/14 10:16 | linux-next | 0a093b2893c7 | 529798b0 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | INFO: rcu detected stall in sync_hw_clock |