rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (1 ticks this GP) idle=0ebc/1/0x4000000000000000 softirq=13480/13480 fqs=2 rcu: (detected by 1, t=10504 jiffies, g=19557, q=192 ncpus=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: kauditd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 RIP: 0010:__kasan_check_read+0xa/0x20 mm/kasan/shadow.c:31 Code: db eb d0 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 89 f6 48 8b 0c 24 <31> d2 e9 6f e6 ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 RSP: 0018:ffffc90000007948 EFLAGS: 00000056 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8171a5ba RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff92ce5500 RBP: 0000000000000002 R08: ffffffff92ce5507 R09: 1ffffffff259caa0 R10: dffffc0000000000 R11: fffffbfff259caa1 R12: 0000000000000001 R13: ffff8880176eda00 R14: 000000000000000f R15: ffff8880176ee570 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30d27000 CR3: 0000000061db0000 CR4: 0000000000350ef0 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] hlock_class kernel/locking/lockdep.c:228 [inline] check_wait_context kernel/locking/lockdep.c:4774 [inline] __lock_acquire+0x5ca/0x1fd0 kernel/locking/lockdep.c:5087 lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 debug_object_deactivate+0x158/0x390 lib/debugobjects.c:763 debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline] debug_deactivate+0x1b/0x200 kernel/time/hrtimer.c:484 __run_hrtimer kernel/time/hrtimer.c:1660 [inline] __hrtimer_run_queues+0x30f/0xd00 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x109/0x3a0 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:console_flush_all+0xaad/0xfd0 kernel/printk/printk.c:2979 Code: ff ff e8 86 6e 1f 00 90 0f 0b 90 e9 d8 f8 ff ff e8 78 6e 1f 00 e8 03 bd fe 09 4d 85 f6 74 b6 e8 69 6e 1f 00 fb 48 8b 44 24 70 <42> 0f b6 04 38 84 c0 48 8b 7c 24 30 0f 85 22 02 00 00 0f b6 1f 31 RSP: 0018:ffffc90000a477e0 EFLAGS: 00000293 RAX: 1ffff92000148f48 RBX: 0000000000000000 RCX: ffff8880176eda00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a47990 R08: ffffffff81758684 R09: 1ffffffff259caa0 R10: dffffc0000000000 R11: fffffbfff259caa1 R12: ffffffff8e8f8718 R13: ffffffff8e8f86c0 R14: 0000000000000200 R15: dffffc0000000000 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3042 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2342 _printk+0xd5/0x120 kernel/printk/printk.c:2367 kauditd_printk_skb kernel/audit.c:546 [inline] kauditd_hold_skb+0x1bc/0x210 kernel/audit.c:581 kauditd_send_queue+0x2b3/0x310 kernel/audit.c:766 kauditd_thread+0x75c/0x990 kernel/audit.c:890 kthread+0x2f2/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 rcu: rcu_preempt kthread starved for 10495 jiffies! g19557 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:25976 pid:16 tgid:16 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x17d3/0x4a20 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6828 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2572 rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862 kthread+0x2f2/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 rcu: Stack dump where RCU GP kthread last ran: CPU: 1 PID: 7795 Comm: syz-executor.1 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline] RIP: 0010:smp_call_function_many_cond+0x1855/0x2960 kernel/smp.c:855 Code: 89 e6 83 e6 01 31 ff e8 d9 d5 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 84 d1 0b 00 eb 38 f3 90 42 0f b6 04 23 <84> c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 68 d1 0b 00 eb e4 44 RSP: 0018:ffffc9000c6a7a40 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 1ffff11017288c0d RCX: ffff88802d681e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000c6a7c40 R08: ffffffff818923b7 R09: 1ffffffff259caa0 R10: dffffc0000000000 R11: fffffbfff259caa1 R12: dffffc0000000000 R13: ffff8880b9446068 R14: ffff8880b953f480 R15: 0000000000000000 FS: 000055557f66c480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020010000 CR3: 00000000233ba000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2086 [inline] text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2296 text_poke_flush arch/x86/kernel/alternative.c:2487 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2494 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 __static_key_slow_dec_cpuslocked+0x10b/0x170 kernel/jump_label.c:276 __static_key_slow_dec kernel/jump_label.c:283 [inline] static_key_slow_dec+0x51/0xa0 kernel/jump_label.c:298 bpf_stats_release+0x23/0x40 kernel/bpf/syscall.c:5439 __fput+0x42b/0x8a0 fs/file_table.c:422 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1541 do_syscall_64+0xfd/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fd7f367cc9a Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24 RSP: 002b:00007ffe7c869270 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fd7f367cc9a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000032 R08: 0000001b31320000 R09: 0000000000000185 R10: 0000000081360ad3 R11: 0000000000000293 R12: 00007fd7f3200aa8 R13: ffffffffffffffff R14: 00007fd7f3200000 R15: 000000000002657f watchdog: BUG: soft lockup - CPU#1 stuck for 225s! [syz-executor.1:7795] Modules linked in: irq event stamp: 998170 hardirqs last enabled at (998169): [] irqentry_exit+0x63/0x90 kernel/entry/common.c:351 hardirqs last disabled at (998170): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1043 softirqs last enabled at (998168): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last enabled at (998168): [] __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633 softirqs last disabled at (998117): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (998117): [] __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633 CPU: 1 PID: 7795 Comm: syz-executor.1 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline] RIP: 0010:smp_call_function_many_cond+0x1855/0x2960 kernel/smp.c:855 Code: 89 e6 83 e6 01 31 ff e8 d9 d5 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 84 d1 0b 00 eb 38 f3 90 42 0f b6 04 23 <84> c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 68 d1 0b 00 eb e4 44 RSP: 0018:ffffc9000c6a7a40 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 1ffff11017288c0d RCX: ffff88802d681e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000c6a7c40 R08: ffffffff818923b7 R09: 1ffffffff259caa0 R10: dffffc0000000000 R11: fffffbfff259caa1 R12: dffffc0000000000 R13: ffff8880b9446068 R14: ffff8880b953f480 R15: 0000000000000000 FS: 000055557f66c480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020010000 CR3: 00000000233ba000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2086 [inline] text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2296 text_poke_flush arch/x86/kernel/alternative.c:2487 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2494 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 __static_key_slow_dec_cpuslocked+0x10b/0x170 kernel/jump_label.c:276 __static_key_slow_dec kernel/jump_label.c:283 [inline] static_key_slow_dec+0x51/0xa0 kernel/jump_label.c:298 bpf_stats_release+0x23/0x40 kernel/bpf/syscall.c:5439 __fput+0x42b/0x8a0 fs/file_table.c:422 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1541 do_syscall_64+0xfd/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7fd7f367cc9a Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24 RSP: 002b:00007ffe7c869270 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fd7f367cc9a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000032 R08: 0000001b31320000 R09: 0000000000000185 R10: 0000000081360ad3 R11: 0000000000000293 R12: 00007fd7f3200aa8 R13: ffffffffffffffff R14: 00007fd7f3200000 R15: 000000000002657f Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: kauditd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 RIP: 0010:advance_sched+0x4ed/0xca0 Code: 8b 03 48 39 c5 48 0f 4c c5 48 89 44 24 10 41 0f b7 f4 31 ff 48 89 cb e8 51 6b 13 f8 66 45 85 e4 0f 8e 66 02 00 00 48 8b 04 24 <48> 05 30 01 00 00 48 89 44 24 38 44 89 e0 48 8d 6b 80 48 ff c8 48 RSP: 0018:ffffc90000007c90 EFLAGS: 00000002 RAX: ffff88801f035000 RBX: ffff88801f036940 RCX: ffff88801f036940 RDX: ffff8880176eda00 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 17cc57e3a8000000 R08: ffffffff89818d9f R09: fffff52000000f80 R10: dffffc0000000000 R11: fffff52000000f80 R12: 0000000000000002 R13: 17cc57e3a4000000 R14: ffff88801f036800 R15: ffff88802f101340 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30d27000 CR3: 0000000061db0000 CR4: 0000000000350ef0 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1692 [inline] __hrtimer_run_queues+0x597/0xd00 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x109/0x3a0 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:console_flush_all+0xaad/0xfd0 kernel/printk/printk.c:2979 Code: ff ff e8 86 6e 1f 00 90 0f 0b 90 e9 d8 f8 ff ff e8 78 6e 1f 00 e8 03 bd fe 09 4d 85 f6 74 b6 e8 69 6e 1f 00 fb 48 8b 44 24 70 <42> 0f b6 04 38 84 c0 48 8b 7c 24 30 0f 85 22 02 00 00 0f b6 1f 31 RSP: 0018:ffffc90000a477e0 EFLAGS: 00000293 RAX: 1ffff92000148f48 RBX: 0000000000000000 RCX: ffff8880176eda00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a47990 R08: ffffffff81758684 R09: 1ffffffff259caa0 R10: dffffc0000000000 R11: fffffbfff259caa1 R12: ffffffff8e8f8718 R13: ffffffff8e8f86c0 R14: 0000000000000200 R15: dffffc0000000000 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3042 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2342 _printk+0xd5/0x120 kernel/printk/printk.c:2367 kauditd_printk_skb kernel/audit.c:546 [inline] kauditd_hold_skb+0x1bc/0x210 kernel/audit.c:581 kauditd_send_queue+0x2b3/0x310 kernel/audit.c:766 kauditd_thread+0x75c/0x990 kernel/audit.c:890 kthread+0x2f2/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243