rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (0 ticks this GP) idle=30b/1/0x4000000000000000 softirq=73573/73573 fqs=0 (detected by 1, t=10502 jiffies, g=116625, q=569) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 26338 Comm: syz-executor.5 Not tainted 5.15.119-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] RIP: 0010:__lock_acquire+0xcd5/0x1ff0 kernel/locking/lockdep.c:4981 Code: 03 48 bf 00 00 00 00 00 fc ff df 0f b6 04 38 84 c0 0f 85 0e 0c 00 00 83 3d 97 bf d9 0f 00 75 44 48 8b 6c 24 58 8d 45 3f 85 ed <0f> 49 c5 c1 f8 06 48 98 48 8d 3c c5 00 c1 bc 8f be 08 00 00 00 e8 RSP: 0018:ffffc90000007a60 EFLAGS: 00000002 RAX: 0000000000000f52 RBX: ffff88801e178b18 RCX: ffffffff913c4003 RDX: 0000000000000000 RSI: 0000000000000000 RDI: dffffc0000000000 RBP: 0000000000000f13 R08: dffffc0000000000 R09: fffffbfff1f7985d R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: ffff88801e178ae8 R14: 1ffff11003c2f167 R15: ffff88801e178b38 FS: 00007f72c603a700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f72c603a718 CR3: 00000000786a2000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] advance_sched+0x47/0x940 net/sched/sch_taprio.c:716 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194 Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 52 63 a4 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 c7 1a 32 f7 65 8b 05 c8 66 dd 75 85 c0 74 3f 48 c7 04 24 0e 36 RSP: 0018:ffffc90002d9f920 EFLAGS: 00000206 RAX: 11393e99ba779100 RBX: 1ffff920005b3f28 RCX: ffffffff8162db08 RDX: dffffc0000000000 RSI: ffffffff8a8afc60 RDI: 0000000000000001 RBP: ffffc90002d9f9b0 R08: dffffc0000000000 R09: fffffbfff1f79821 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff920005b3f24 R14: ffffc90002d9f940 R15: 0000000000000246 clock_was_set+0x67d/0x880 kernel/time/hrtimer.c:970 timekeeping_inject_offset+0x65f/0x710 kernel/time/timekeeping.c:1378 do_adjtimex+0x511/0xaa0 kernel/time/timekeeping.c:2427 do_clock_adjtime kernel/time/posix-timers.c:1122 [inline] __do_sys_clock_adjtime kernel/time/posix-timers.c:1134 [inline] __se_sys_clock_adjtime kernel/time/posix-timers.c:1125 [inline] __x64_sys_clock_adjtime+0x1dc/0x290 kernel/time/posix-timers.c:1125 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f72c7ae9389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f72c603a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000131 RAX: ffffffffffffffda RBX: 00007f72c7c09050 RCX: 00007f72c7ae9389 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 00007f72c7b34493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffab98b06f R14: 00007f72c603a300 R15: 0000000000022000 rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g116625 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=0 timer-softirq=75803 rcu: rcu_preempt kthread starved for 10502 jiffies! g116625 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27000 pid: 15 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5026 [inline] __schedule+0x12c4/0x4590 kernel/sched/core.c:6372 schedule+0x11b/0x1f0 kernel/sched/core.c:6455 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884 rcu_gp_fqs_loop+0x2af/0xf70 kernel/rcu/tree.c:1959 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2132 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 26338 Comm: syz-executor.5 Not tainted 5.15.119-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:timerqueue_add+0x25e/0x280 lib/timerqueue.c:40 Code: 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 d8 3d 9e fd 4c 89 3b 4d 85 ff 0f 95 c3 4c 89 ff 4c 89 e6 e8 e4 4f ff ff 89 d8 <48> 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 9e d1 54 fd 0f 0b RSP: 0018:ffffc90000007cc0 EFLAGS: 00000086 RAX: 00000000b9a2a301 RBX: ffff8880b9a2a301 RCX: dffffc0000000000 RDX: 0000000000000018 RSI: ffff8880b9a2a350 RDI: ffff888075c00b40 RBP: 1ffff1100eb80168 R08: dffffc0000000000 R09: ffff888075c00b40 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880b9a2a350 R13: ffff8880b9a2a350 R14: 0000000000000000 R15: ffff888075c00b40 FS: 00007f72c603a700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f72c603a718 CR3: 00000000786a2000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: enqueue_hrtimer+0x14f/0x310 kernel/time/hrtimer.c:1091 __run_hrtimer kernel/time/hrtimer.c:1702 [inline] __hrtimer_run_queues+0x6b6/0xcf0 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194 Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 52 63 a4 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 c7 1a 32 f7 65 8b 05 c8 66 dd 75 85 c0 74 3f 48 c7 04 24 0e 36 RSP: 0018:ffffc90002d9f920 EFLAGS: 00000206 RAX: 11393e99ba779100 RBX: 1ffff920005b3f28 RCX: ffffffff8162db08 RDX: dffffc0000000000 RSI: ffffffff8a8afc60 RDI: 0000000000000001 RBP: ffffc90002d9f9b0 R08: dffffc0000000000 R09: fffffbfff1f79821 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff920005b3f24 R14: ffffc90002d9f940 R15: 0000000000000246 clock_was_set+0x67d/0x880 kernel/time/hrtimer.c:970 timekeeping_inject_offset+0x65f/0x710 kernel/time/timekeeping.c:1378 do_adjtimex+0x511/0xaa0 kernel/time/timekeeping.c:2427 do_clock_adjtime kernel/time/posix-timers.c:1122 [inline] __do_sys_clock_adjtime kernel/time/posix-timers.c:1134 [inline] __se_sys_clock_adjtime kernel/time/posix-timers.c:1125 [inline] __x64_sys_clock_adjtime+0x1dc/0x290 kernel/time/posix-timers.c:1125 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f72c7ae9389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f72c603a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000131 RAX: ffffffffffffffda RBX: 00007f72c7c09050 RCX: 00007f72c7ae9389 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 00007f72c7b34493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffab98b06f R14: 00007f72c603a300 R15: 0000000000022000