rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (0 ticks this GP) idle=07ac/1/0x4000000000000000 softirq=7615/7615 fqs=0 rcu: (detected by 1, t=10502 jiffies, g=7697, q=14854 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5444 Comm: syz-executor.0 Not tainted 6.8.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:get_current arch/x86/include/asm/current.h:42 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x60 kernel/kcov.c:206 Code: 00 00 f3 0f 1e fa 53 48 89 fb e8 13 00 00 00 48 8b 3d e4 25 61 0b 48 89 de 5b e9 53 f5 51 00 0f 1f 00 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d 80 e3 75 7e 65 8b 15 81 e3 75 7e f7 c2 00 01 ff 00 74 RSP: 0018:ffffc90000007d58 EFLAGS: 00000046 RAX: ffffffff817ce9fc RBX: 0000000000000000 RCX: ffff888028df1dc0 RDX: ffff888028df1dc0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000007ea8 R08: ffffffff817ce9e3 R09: 1ffffffff1d782e5 R10: dffffc0000000000 R11: fffffbfff1d782e6 R12: ffff8880b982ba00 R13: ffffffff88fec070 R14: ffff888028bb4340 R15: dffffc0000000000 FS: 00007f7a42a716c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000600 CR3: 000000001bb7f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1687 [inline] __hrtimer_run_queues+0x56c/0xd10 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline] __sysvec_apic_timer_interrupt+0x104/0x390 arch/x86/kernel/apic/apic.c:1082 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 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 2e f7 fb f6 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 43 2a 71 f6 65 8b 05 74 d4 14 75 85 c0 74 3f 48 c7 04 24 0e 36 RSP: 0018:ffffc90005167900 EFLAGS: 00000206 RAX: 6ba3f51e5eb04e00 RBX: 1ffff92000a2cf24 RCX: ffffffff816d608a RDX: dffffc0000000000 RSI: ffffffff8b2a8140 RDI: 0000000000000001 RBP: ffffc90005167990 R08: ffffffff909302e7 R09: 1ffffffff212605c R10: dffffc0000000000 R11: fffffbfff212605d R12: dffffc0000000000 R13: 1ffff92000a2cf20 R14: ffffc90005167920 R15: 0000000000000246 clock_was_set+0x6a1/0x830 kernel/time/hrtimer.c:972 timekeeping_inject_offset+0x663/0x710 kernel/time/timekeeping.c:1395 do_adjtimex+0x515/0xab0 kernel/time/timekeeping.c:2444 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+0x1e0/0x290 kernel/time/posix-timers.c:1162 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x85/0x160 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f7a41c7dda9 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:00007f7a42a710c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000131 RAX: ffffffffffffffda RBX: 00007f7a41dabf80 RCX: 00007f7a41c7dda9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 00007f7a41cca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f7a41dabf80 R15: 00007ffc2396fd28 rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g7697 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=0 timer-softirq=4121 rcu: rcu_preempt kthread starved for 10502 jiffies! g7697 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:24616 pid:16 tgid:16 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x19f5/0x4b30 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 schedule_timeout+0x1bd/0x300 kernel/time/timer.c:2183 rcu_gp_fqs_loop+0x30a/0x14f0 kernel/rcu/tree.c:1663 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:243