rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (10499 ticks this GP) idle=cb54/1/0x4000000000000000 softirq=82944/82944 fqs=0 (t=10500 jiffies g=115861 q=99 ncpus=2) rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g115861 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=1 timer-softirq=62397 rcu: rcu_preempt kthread starved for 10500 jiffies! g115861 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 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:26968 pid:16 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5245 [inline] __schedule+0x142d/0x4550 kernel/sched/core.c:6558 schedule+0xbf/0x180 kernel/sched/core.c:6634 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965 rcu_gp_fqs_loop+0x2d2/0x1120 kernel/rcu/tree.c:1706 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1905 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:307 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 19713 Comm: syz-executor.4 Not tainted 6.1.84-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:instrument_atomic_read include/linux/instrumented.h:72 [inline] RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4724 [inline] RIP: 0010:__lock_acquire+0x540/0x1f80 kernel/locking/lockdep.c:4999 Code: 00 00 0f b6 2b 41 0f b6 04 17 84 c0 0f 85 72 12 00 00 41 8b 1e 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 20 82 49 90 08 00 00 00 e8 d6 9f 77 00 48 0f a3 1d de 22 df 0e 73 1f 48 8d RSP: 0018:ffffc900001e0a60 EFLAGS: 00000007 RAX: 000000000000001e RBX: 00000000000007b1 RCX: ffffffff816a5e85 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff90498310 RBP: 0000000000000002 R08: dffffc0000000000 R09: fffffbfff2093063 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888017354658 R13: ffff888017353b80 R14: ffff8880173546a8 R15: 1ffff11002e6a8d5 FS: 00007f917d7ca6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30824000 CR3: 0000000076cd8000 CR4: 00000000003526e0 DR0: 0000000000000000 DR1: 0000000000000094 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] advance_sched+0x47/0x970 net/sched/sch_taprio.c:700 __run_hrtimer kernel/time/hrtimer.c:1686 [inline] __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1750 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline] __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [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 12 a3 4d f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 17 e9 c9 f6 65 8b 05 b8 14 6e 75 85 c0 74 3f 48 c7 04 24 0e 36 RSP: 0018:ffffc9000b59f920 EFLAGS: 00000206 RAX: 37bd1bbad06cb200 RBX: 1ffff920016b3f28 RCX: ffffffff816ac11a RDX: dffffc0000000000 RSI: ffffffff8aebeec0 RDI: 0000000000000001 RBP: ffffc9000b59f9b0 R08: dffffc0000000000 R09: fffffbfff2093045 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff920016b3f24 R14: ffffc9000b59f940 R15: 0000000000000246 clock_was_set+0x179/0x900 kernel/time/hrtimer.c:970 timekeeping_inject_offset+0x65f/0x710 kernel/time/timekeeping.c:1395 do_adjtimex+0x511/0xaa0 kernel/time/timekeeping.c:2444 do_clock_adjtime kernel/time/posix-timers.c:1149 [inline] __do_sys_clock_adjtime kernel/time/posix-timers.c:1161 [inline] __se_sys_clock_adjtime kernel/time/posix-timers.c:1152 [inline] __x64_sys_clock_adjtime+0x1dc/0x290 kernel/time/posix-timers.c:1152 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f917ca7de69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f917d7ca0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000131 RAX: ffffffffffffffda RBX: 00007f917cbabf80 RCX: 00007f917ca7de69 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 00007f917caca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f917cbabf80 R15: 00007ffe40a86698 CPU: 0 PID: 17676 Comm: kworker/u4:14 Not tainted 6.1.84-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:424 [inline] RIP: 0010:smp_call_function_many_cond+0x1fb0/0x3460 kernel/smp.c:998 Code: 2f 44 89 ee 83 e6 01 31 ff e8 ec 42 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 0a e8 77 3f 0b 00 e9 1b ff ff ff f3 90 <42> 0f b6 04 2b 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 fe fe ff ff RSP: 0018:ffffc9000b38f5a0 EFLAGS: 00000293 RAX: ffffffff817f479b RBX: 1ffff110173281b1 RCX: ffff88802196d940 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000b38f980 R08: ffffffff817f4764 R09: fffffbfff2093045 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000 R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b9940d88 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff009b79198 CR3: 000000000ce8e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000094 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1166 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1334 [inline] text_poke_bp_batch+0x2bb/0x940 arch/x86/kernel/alternative.c:1534 text_poke_flush arch/x86/kernel/alternative.c:1725 [inline] text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1732 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x12e/0x250 kernel/jump_label.c:177 static_key_enable+0x16/0x20 kernel/jump_label.c:190 toggle_allocation_gate+0xbf/0x480 mm/kfence/core.c:804 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:307