rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...!: (0 ticks this GP) idle=73ec/1/0x4000000000000000 softirq=7627/7627 fqs=0 rcu: (detected by 0, t=10502 jiffies, g=9589, q=62 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5101 Comm: syz-executor393 Not tainted 6.6.0-rc7-next-20231027-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:133 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:178 [inline] RIP: 0010:kasan_check_range+0xd4/0x190 mm/kasan/generic.c:187 Code: 83 38 00 74 ed 48 8d 50 08 eb 0d 48 83 c0 01 48 39 c2 0f 84 89 00 00 00 80 38 00 74 ee 48 89 c2 b8 01 00 00 00 48 85 d2 74 1e <41> 83 e2 07 49 39 d1 75 0a 45 3a 11 b8 01 00 00 00 7c 0b 44 89 c2 RSP: 0018:ffffc900001f0c18 EFLAGS: 00000082 RAX: 0000000000000001 RBX: fffff5200003e18d RCX: ffffffff8169c31d RDX: fffff5200003e18c RSI: 0000000000000004 RDI: ffffc900001f0c60 RBP: fffff5200003e18c R08: 0000000000000001 R09: fffff5200003e18c R10: ffffc900001f0c63 R11: 0000000000000000 R12: ffffffff929c5e38 R13: ffffffff929c5e40 R14: ffffffff8acf3ea0 R15: 1ffff9200003e1a2 FS: 0000555556890380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055917f7ad000 CR3: 0000000073b5a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1295 [inline] queued_spin_lock include/asm-generic/qspinlock.h:111 [inline] do_raw_spin_lock+0x12d/0x2b0 kernel/locking/spinlock_debug.c:115 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0x42/0x50 kernel/locking/spinlock.c:162 debug_object_activate+0x1a0/0x490 lib/debugobjects.c:717 debug_hrtimer_activate kernel/time/hrtimer.c:422 [inline] debug_activate kernel/time/hrtimer.c:477 [inline] enqueue_hrtimer+0x25/0x320 kernel/time/hrtimer.c:1087 __run_hrtimer kernel/time/hrtimer.c:1705 [inline] __hrtimer_run_queues+0xa07/0xc00 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline] __sysvec_apic_timer_interrupt+0x10c/0x400 arch/x86/kernel/apic/apic.c:1082 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x70 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 46 9b e3 f6 48 89 df e8 7e 1a e4 f6 f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 f5 64 d5 f6 65 8b 05 06 11 7e 75 85 c0 74 12 5b RSP: 0018:ffffc90003b4fa78 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffff8880b982b940 RCX: 1ffffffff23e2716 RDX: 0000000000000000 RSI: ffffffff8accbda0 RDI: ffffffff8b2e91c0 RBP: 0000000000000282 R08: 0000000000000001 R09: fffffbfff23e25d0 R10: ffffffff91f12e87 R11: 0000000000000002 R12: 0000000000000004 R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 clock_was_set+0x591/0x850 kernel/time/hrtimer.c:972 timekeeping_inject_offset+0x4d1/0x640 kernel/time/timekeeping.c:1395 do_adjtimex+0x373/0xaa0 kernel/time/timekeeping.c:2444 do_clock_adjtime kernel/time/posix-timers.c:1159 [inline] __do_sys_clock_adjtime+0x173/0x280 kernel/time/posix-timers.c:1171 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x62/0x6a RIP: 0033:0x7f34c8c34ee9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 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:00007ffc90236a58 EFLAGS: 00000246 ORIG_RAX: 0000000000000131 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f34c8c34ee9 RDX: 00007f34c8c34ee9 RSI: 0000000020000200 RDI: 0000000000000000 RBP: 00000000000f4240 R08: 0000000100000000 R09: 0000000100000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc90236ab0 R13: 0000000000000001 R14: 00007ffc90236ab0 R15: 0000000000000003 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.307 msecs rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g9589 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=1 timer-softirq=8980 rcu: rcu_preempt kthread starved for 10502 jiffies! g9589 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:28672 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0xee5/0x59b0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0xe5/0x270 kernel/sched/core.c:6778 schedule_timeout+0x156/0x2b0 kernel/time/timer.c:2167 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:1626 rcu_gp_kthread+0x243/0x380 kernel/rcu/tree.c:1825 kthread+0x337/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242