rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...!: (1 ticks this GP) idle=94bc/1/0x4000000000000000 softirq=61086/61086 fqs=0 (detected by 0, t=10502 jiffies, g=91909, q=339 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: kauditd Not tainted 6.1.30-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023 RIP: 0010:validate_chain+0x27/0x58e0 kernel/locking/lockdep.c:3788 Code: 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 80 02 00 00 49 89 ce 89 54 24 60 48 89 bc 24 80 00 00 00 <65> 48 8b 04 25 28 00 00 00 48 89 84 24 60 02 00 00 49 bc 00 00 00 RSP: 0018:ffffc900001e07a0 EFLAGS: 00000086 RAX: 1ffffffff1ff001c RBX: ffffffff8ff800e0 RCX: 3bee7565ff41f5c5 RDX: 0000000000000001 RSI: ffff888012766448 RDI: ffff888012765940 RBP: ffffc900001e0a50 R08: dffffc0000000000 R09: fffffbfff2051045 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888012766418 R13: ffff888012765940 R14: 3bee7565ff41f5c5 R15: 1ffff110024ecc8d FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555557330848 CR3: 00000000329bd000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:306 rcu_read_lock include/linux/rcupdate.h:747 [inline] advance_sched+0x6ce/0x940 net/sched/sch_taprio.c:753 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811 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:649 RIP: 0010:console_emit_next_record+0xb70/0xda0 kernel/printk/printk.c:2740 Code: 00 48 8b 5c 24 68 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 84 05 1c 00 eb 06 e8 7d 05 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <41> c7 44 1d 00 00 00 00 00 49 c7 44 1d 0a 00 00 00 00 49 c7 44 1d RSP: 0018:ffffc90000a3f820 EFLAGS: 00000293 RAX: ffffffff816dbff3 RBX: 1ffff92000147f18 RCX: ffff888012765940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a3fad0 R08: ffffffff816dbfc9 R09: fffffbfff2051045 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200 R13: dffffc0000000000 R14: 0000000000000001 R15: ffffc90000a3fb40 console_unlock+0x278/0x6e0 kernel/printk/printk.c:2860 vprintk_emit+0xd1/0x1f0 kernel/printk/printk.c:2268 _printk+0xd1/0x111 kernel/printk/printk.c:2289 kauditd_printk_skb kernel/audit.c:536 [inline] kauditd_hold_skb+0x1b8/0x200 kernel/audit.c:571 kauditd_send_queue+0x2a3/0x2f0 kernel/audit.c:756 kauditd_thread+0x722/0x960 kernel/audit.c:880 kthread+0x26e/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g91909 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=1 timer-softirq=71874 rcu: rcu_preempt kthread starved for 10502 jiffies! g91909 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:26712 pid:16 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5241 [inline] __schedule+0x132c/0x4330 kernel/sched/core.c:6554 schedule+0xbf/0x180 kernel/sched/core.c:6630 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935 rcu_gp_fqs_loop+0x2c2/0x1010 kernel/rcu/tree.c:1661 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1860 kthread+0x26e/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 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: 27 Comm: kauditd Not tainted 6.1.30-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023 RIP: 0010:match_held_lock+0x0/0xb0 kernel/locking/lockdep.c:5114 Code: ed 7d d0 03 00 75 cf 48 c7 c7 40 cf eb 8a 48 c7 c6 80 cf eb 8a e8 20 6e cf f6 0f 0b eb b6 e8 e7 fa ff ff 0f 1f 80 00 00 00 00 <55> 53 bd 01 00 00 00 48 39 77 10 74 67 48 89 fb 81 7f 20 00 00 10 RSP: 0018:ffffc900001e0c70 EFLAGS: 00000083 RAX: 0000000000000002 RBX: 0000000000000001 RCX: ffff888012765940 RDX: ffff888012765940 RSI: ffff88803ed4a300 RDI: ffff888012766448 RBP: ffff888012766448 R08: ffffffff88b510fe R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000046 R13: ffff888012765940 R14: 00000000ffffffff R15: ffff88803ed4a300 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555557330848 CR3: 00000000329bd000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_is_held kernel/locking/lockdep.c:5410 [inline] lock_is_held_type+0xa4/0x180 kernel/locking/lockdep.c:5712 lock_is_held include/linux/lockdep.h:283 [inline] advance_sched+0xd0/0x940 net/sched/sch_taprio.c:703 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811 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:649 RIP: 0010:console_emit_next_record+0xb70/0xda0 kernel/printk/printk.c:2740 Code: 00 48 8b 5c 24 68 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 84 05 1c 00 eb 06 e8 7d 05 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <41> c7 44 1d 00 00 00 00 00 49 c7 44 1d 0a 00 00 00 00 49 c7 44 1d RSP: 0018:ffffc90000a3f820 EFLAGS: 00000293 RAX: ffffffff816dbff3 RBX: 1ffff92000147f18 RCX: ffff888012765940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a3fad0 R08: ffffffff816dbfc9 R09: fffffbfff2051045 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200 R13: dffffc0000000000 R14: 0000000000000001 R15: ffffc90000a3fb40 console_unlock+0x278/0x6e0 kernel/printk/printk.c:2860 vprintk_emit+0xd1/0x1f0 kernel/printk/printk.c:2268 _printk+0xd1/0x111 kernel/printk/printk.c:2289 kauditd_printk_skb kernel/audit.c:536 [inline] kauditd_hold_skb+0x1b8/0x200 kernel/audit.c:571 kauditd_send_queue+0x2a3/0x2f0 kernel/audit.c:756 kauditd_thread+0x722/0x960 kernel/audit.c:880 kthread+0x26e/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [syz-executor.1:14707] Modules linked in: irq event stamp: 2191706 hardirqs last enabled at (2191705): [] asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 hardirqs last disabled at (2191706): [] sysvec_apic_timer_interrupt+0xa/0xb0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (2141812): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last enabled at (2141812): [] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650 softirqs last disabled at (2141743): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last disabled at (2141743): [] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:650 CPU: 0 PID: 14707 Comm: syz-executor.1 Not tainted 6.1.30-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023 RIP: 0010:smp_call_function_many_cond+0x1f7d/0x33d0 kernel/smp.c:987 Code: df 75 0a e8 e5 08 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 e8 c3 08 0b 00 e1 44 89 f9 80 e1 07 80 c1 03 38 c1 7c df 4c 89 ff e8 dc 4f 61 RSP: 0000:ffffc900052af3a0 EFLAGS: 00000293 RAX: ffffffff817ebcad RBX: 1ffff11017328021 RCX: ffff88803f5f9dc0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900052af780 R08: ffffffff817ebc76 R09: fffffbfff205104b R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000 R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b9940108 FS: 0000555557327400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3f3e6e7bc3 CR3: 00000000329bd000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155 __flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline] flush_tlb_multi arch/x86/mm/tlb.c:924 [inline] flush_tlb_mm_range+0x353/0x590 arch/x86/mm/tlb.c:1010 dup_mmap kernel/fork.c:711 [inline] dup_mm+0x1106/0x1610 kernel/fork.c:1532 copy_mm+0xca/0x160 kernel/fork.c:1581 copy_process+0x19a2/0x4020 kernel/fork.c:2259 kernel_clone+0x222/0x920 kernel/fork.c:2679 __do_sys_clone kernel/fork.c:2820 [inline] __se_sys_clone kernel/fork.c:2804 [inline] __x64_sys_clone+0x231/0x280 kernel/fork.c:2804 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f416ba89e9b Code: ed 0f 85 60 01 00 00 64 4c 8b 0c 25 10 00 00 00 45 31 c0 4d 8d 91 d0 02 00 00 31 d2 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 89 00 00 00 41 89 c5 85 c0 0f 85 90 00 00 RSP: 002b:00007ffd1ba34a60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f416ba89e9b RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000555557327400 R10: 00005555573276d0 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd1ba34b40 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: kauditd Not tainted 6.1.30-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023 RIP: 0010:cpu_max_bits_warn include/linux/cpumask.h:110 [inline] RIP: 0010:cpumask_check include/linux/cpumask.h:117 [inline] RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:444 [inline] RIP: 0010:cpu_online include/linux/cpumask.h:1030 [inline] RIP: 0010:trace_hrtimer_expire_entry include/trace/events/timer.h:235 [inline] RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1682 [inline] RIP: 0010:__hrtimer_run_queues+0x4ed/0xe50 kernel/time/hrtimer.c:1749 Code: 8b 44 24 30 42 0f b6 04 38 84 c0 0f 85 74 04 00 00 8b 1d ce ea d9 0c 89 df 44 89 ee e8 9c 99 10 00 44 39 eb 0f 86 fc 02 00 00 2e 98 10 00 45 89 ef 4c 89 f8 48 c1 e8 06 48 8d 3c c5 e8 15 53 RSP: 0018:ffffc900001e0d60 EFLAGS: 00000002 RAX: 0000000000010001 RBX: 0000000000000002 RCX: ffff888012765940 RDX: ffff888012765940 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc900001e0eb0 R08: ffffffff81792d34 R09: ffffed1017325499 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff88b51040 R13: 0000000000000001 R14: ffff8880b992a4c0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555557330848 CR3: 00000000329bd000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811 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:649 RIP: 0010:console_emit_next_record+0xb70/0xda0 kernel/printk/printk.c:2740 Code: 00 48 8b 5c 24 68 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 84 05 1c 00 eb 06 e8 7d 05 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <41> c7 44 1d 00 00 00 00 00 49 c7 44 1d 0a 00 00 00 00 49 c7 44 1d RSP: 0018:ffffc90000a3f820 EFLAGS: 00000293 RAX: ffffffff816dbff3 RBX: 1ffff92000147f18 RCX: ffff888012765940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a3fad0 R08: ffffffff816dbfc9 R09: fffffbfff2051045 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200 R13: dffffc0000000000 R14: 0000000000000001 R15: ffffc90000a3fb40 console_unlock+0x278/0x6e0 kernel/printk/printk.c:2860 vprintk_emit+0xd1/0x1f0 kernel/printk/printk.c:2268 _printk+0xd1/0x111 kernel/printk/printk.c:2289 kauditd_printk_skb kernel/audit.c:536 [inline] kauditd_hold_skb+0x1b8/0x200 kernel/audit.c:571 kauditd_send_queue+0x2a3/0x2f0 kernel/audit.c:756 kauditd_thread+0x722/0x960 kernel/audit.c:880 kthread+0x26e/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306