rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (0 ticks this GP) idle=2fc4/1/0x4000000000000000 softirq=36259/36259 fqs=0 rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P11837/1:b..l rcu: (detected by 1, t=10505 jiffies, g=51365, q=312 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 14397 Comm: syz.1.2192 Not tainted 6.11.0-rc3-syzkaller-00338-gc3f2d783a459 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:215 Code: 8b 3d 1c e8 95 0c 48 89 de 5b e9 63 94 5b 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 00 d7 03 00 65 8b 15 00 4c 70 7e 81 e2 00 01 ff 00 RSP: 0018:ffffc90000007d20 EFLAGS: 00000046 RAX: ffffffff818100ba RBX: 0000000000000000 RCX: 0000000000010003 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff951f0da3 R09: 1ffffffff2a3e1b4 R10: dffffc0000000000 R11: fffffbfff2a3e1b5 R12: dffffc0000000000 R13: ffff8880b922c980 R14: ffff88802ca6e340 R15: ffff8880b922c880 FS: 00007fa7977c06c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1159e7bf98 CR3: 0000000071fbc000 CR4: 0000000000350ef0 Call Trace: arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline] static_key_false include/linux/jump_label.h:207 [inline] trace_hrtimer_start include/trace/events/timer.h:222 [inline] debug_activate kernel/time/hrtimer.c:479 [inline] enqueue_hrtimer+0x3a/0x3c0 kernel/time/hrtimer.c:1085 __run_hrtimer kernel/time/hrtimer.c:1706 [inline] __hrtimer_run_queues+0x6cb/0xd50 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x112/0x3f0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194 Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 8e 16 3a f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 73 4c a2 f5 65 8b 05 b4 20 43 74 85 c0 74 43 48 c7 04 24 0e 36 RSP: 0018:ffffc90009fb7920 EFLAGS: 00000206 RAX: b54cc7678ebf7300 RBX: 1ffff920013f6f28 RCX: ffffffff8170417a RDX: dffffc0000000000 RSI: ffffffff8c0ad560 RDI: 0000000000000001 RBP: ffffc90009fb79b0 R08: ffffffff93731847 R09: 1ffffffff26e6308 R10: dffffc0000000000 R11: fffffbfff26e6309 R12: dffffc0000000000 R13: 1ffff920013f6f24 R14: ffffc90009fb7940 R15: 0000000000000246 clock_was_set+0x686/0x810 kernel/time/hrtimer.c:968 timekeeping_inject_offset+0x4e8/0x580 kernel/time/timekeeping.c:1524 do_adjtimex+0x515/0xab0 kernel/time/timekeeping.c:2574 do_clock_adjtime kernel/time/posix-timers.c:1159 [inline] __do_sys_clock_adjtime kernel/time/posix-timers.c:1171 [inline] __se_sys_clock_adjtime kernel/time/posix-timers.c:1162 [inline] __x64_sys_clock_adjtime+0x1e3/0x290 kernel/time/posix-timers.c:1162 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa796979e79 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa7977c0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000131 RAX: ffffffffffffffda RBX: 00007fa796b15f80 RCX: 00007fa796979e79 RDX: 0000000000000000 RSI: 0000000020000480 RDI: 0000000000000000 RBP: 00007fa7969e7916 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa796b15f80 R15: 00007fffa0f47738 task:syz-executor state:R running task stack:21376 pid:11837 tgid:11837 ppid:11803 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:391 [inline] copy_pte_range mm/memory.c:1191 [inline] copy_pmd_range+0x7ad5/0x8500 mm/memory.c:1252 copy_pud_range mm/memory.c:1289 [inline] copy_p4d_range mm/memory.c:1313 [inline] copy_page_range+0x99f/0xe90 mm/memory.c:1411 dup_mmap kernel/fork.c:749 [inline] dup_mm kernel/fork.c:1672 [inline] copy_mm+0x11ea/0x1f30 kernel/fork.c:1721 copy_process+0x187c/0x3e10 kernel/fork.c:2387 kernel_clone+0x226/0x8f0 kernel/fork.c:2800 __do_sys_clone kernel/fork.c:2943 [inline] __se_sys_clone kernel/fork.c:2927 [inline] __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2927 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f97f95706d3 RSP: 002b:00007ffcf9ad9b18 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f97f95706d3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 00005555954e67d0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000058c6a R14: 0000000000058c24 R15: 00007ffcf9ad9ca0 rcu: rcu_preempt kthread timer wakeup didn't happen for 10504 jiffies! g51365 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=0 timer-softirq=28196 rcu: rcu_preempt kthread starved for 10505 jiffies! g51365 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:24912 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244