rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...!: (0 ticks this GP) idle=4dd4/1/0x4000000000000000 softirq=21212/21212 fqs=0 rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8492/1:b..l rcu: (detected by 0, t=10506 jiffies, g=36189, q=218 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8495 Comm: syz-executor.3 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:104 [inline] RIP: 0010:lock_is_held_type+0x57/0x150 kernel/locking/lockdep.c:5821 Code: 85 c0 0f 85 ce 00 00 00 65 4c 8b 25 53 8c 31 75 41 8b 94 24 d4 0a 00 00 85 d2 0f 85 b6 00 00 00 48 89 fd 41 89 f6 9c 8f 04 24 48 c7 c7 00 ba 0c 8b 45 31 ff e8 09 17 00 00 4d 8d ac 24 d8 0a RSP: 0018:ffffc90000a08df0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8880b952c9d8 RBP: ffff8880b952c9d8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff8b0f38c0 R12: ffff8880205b8000 R13: 00000000ffffffff R14: 00000000ffffffff R15: ffffffff88e73220 FS: 00007fe9ba54e6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe19448d000 CR3: 00000000605d2000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held include/linux/lockdep.h:231 [inline] __run_hrtimer kernel/time/hrtimer.c:1658 [inline] __hrtimer_run_queues+0x960/0xc20 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x410 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 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+0x31/0x80 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 a6 3f 95 f6 48 89 df e8 0e bb 95 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 95 08 87 f6 65 8b 05 e6 d0 2d 75 85 c0 74 16 5b RSP: 0018:ffffc9000356fca8 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffff8880b942c9c0 RCX: 1ffffffff27b4f6f RDX: 0000000000000000 RSI: ffffffff8b0cb740 RDI: ffffffff8b6e88a0 RBP: 0000000000000286 R08: 0000000000000001 R09: fffffbfff27b4e30 R10: ffffffff93da7187 R11: 0000000000000002 R12: 0000000000000004 R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 clock_was_set+0x591/0x850 kernel/time/hrtimer.c:973 do_settimeofday64+0x3a6/0x5c0 kernel/time/timekeeping.c:1346 do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:195 __do_sys_clock_settime kernel/time/posix-timers.c:1129 [inline] __se_sys_clock_settime kernel/time/posix-timers.c:1113 [inline] __x64_sys_clock_settime+0x1bf/0x2a0 kernel/time/posix-timers.c:1113 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fe9b987dda9 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:00007fe9ba54e0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 00007fe9b99abf80 RCX: 00007fe9b987dda9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 00007fe9b98ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fe9b99abf80 R15: 00007fffe992a108 task:sed state:R running task stack:26416 pid:8492 tgid:8492 ppid:8490 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5c70 kernel/sched/core.c:6736 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7058 irqentry_exit+0x36/0x90 kernel/entry/common.c:348 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200 Code: be b0 01 00 00 e8 a0 ff ff ff 31 c0 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 65 48 8b 15 04 db 76 7e 65 8b 05 05 db 76 7e a9 00 01 RSP: 0018:ffffc9000364f838 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff8ac073ad RDX: ffff88807b1f3c00 RSI: ffffffff8ac0723d RDI: 0000000000000004 RBP: ffff88802c47b860 R08: 0000000000000004 R09: 0000000000000002 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88802c47a40c R13: 0000000000000003 R14: ffff88802cbac80c R15: 0000000000000001 mas_validate_parent_slot lib/maple_tree.c:7404 [inline] mt_validate+0x96b/0x4390 lib/maple_tree.c:7594 validate_mm+0x9c/0x4b0 mm/mmap.c:288 __split_vma+0xe3e/0x1190 mm/mmap.c:2389 split_vma mm/mmap.c:2415 [inline] vma_modify+0x32a/0x460 mm/mmap.c:2457 vma_modify_flags include/linux/mm.h:3283 [inline] mprotect_fixup+0x228/0xc90 mm/mprotect.c:635 do_mprotect_pkey+0x859/0xd70 mm/mprotect.c:809 __do_sys_mprotect mm/mprotect.c:830 [inline] __se_sys_mprotect mm/mprotect.c:827 [inline] __x64_sys_mprotect+0x78/0xc0 mm/mprotect.c:827 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fe29d7bcbb7 RSP: 002b:00007ffd35dc00d8 EFLAGS: 00000206 ORIG_RAX: 000000000000000a RAX: ffffffffffffffda RBX: 00007fe29d7995c0 RCX: 00007fe29d7bcbb7 RDX: 0000000000000001 RSI: 0000000000004000 RDI: 00007fe29d6c3000 RBP: 00007ffd35dc01f0 R08: 00007ffd35dc0000 R09: 00007fe29d7d0ab0 R10: 00007fe29d529ab8 R11: 0000000000000206 R12: 00007fe29d7995c0 R13: 00007fe29d7c4eda R14: 00007fe29d6c6bf8 R15: 00007fe29d6c6b70 rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g36189 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=1 timer-softirq=18247 rcu: rcu_preempt kthread starved for 10506 jiffies! g36189 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:28048 pid:16 tgid:16 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5c70 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6828 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2572 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:1663 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:1862 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243