watchdog: BUG: soft lockup - CPU#0 stuck for 151s! [syz.6.51:6350] Modules linked in: irq event stamp: 1474 hardirqs last enabled at (1473): [] seqcount_lockdep_reader_access+0x89/0xc0 include/linux/seqlock.h:75 hardirqs last disabled at (1474): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (1402): [] bpf_prog_load+0x15fa/0x1c60 kernel/bpf/syscall.c:3198 softirqs last disabled at (1400): [] spin_lock_bh include/linux/spinlock.h:353 [inline] softirqs last disabled at (1400): [] bpf_ksym_add+0x2c/0x340 kernel/bpf/core.c:857 CPU: 0 UID: 0 PID: 6350 Comm: syz.6.51 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026 RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947 Code: ff ff ff e8 60 a9 65 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 62 f3 3d 13 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 7f bc 68 0a cc 48 8d 3d 27 1b 1d RSP: 0018:ffffc90003c0efc0 EFLAGS: 00000296 RAX: 0448ad400286df00 RBX: 0000000000000000 RCX: 8000000000000003 RDX: 000000006f2c9d18 RSI: ffffffff8e9364d9 RDI: ffffffff8c8ead80 RBP: ffff8880367fddc0 R08: ffffffff81d56c84 R09: 0000000000000000 R10: 6f6c5f646165725f R11: 64656863735f6b63 R12: ffffffff9015a2a0 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246 FS: 0000000000000000(0000) GS:ffff8881233fe000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555564a8e7d0 CR3: 000000000ff48000 CR4: 00000000003526f0 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] trace_call_bpf+0xd5/0xb80 kernel/trace/bpf_trace.c:-1 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11524 do_perf_trace_lock_acquire include/trace/events/lock.h:23 [inline] perf_trace_lock_acquire+0x346/0x440 include/trace/events/lock.h:23 __do_trace_lock_acquire include/trace/events/lock.h:23 [inline] trace_lock_acquire include/trace/events/lock.h:23 [inline] lock_acquire+0x303/0x350 kernel/locking/lockdep.c:5905 rcu_lock_acquire include/linux/rcupdate.h:309 [inline] rcu_read_lock_sched include/linux/rcupdate.h:947 [inline] pfn_valid+0xd6/0x490 include/linux/mmzone.h:2297 page_table_check_clear+0x21/0x590 mm/page_table_check.c:70 ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline] get_and_clear_full_ptes include/linux/pgtable.h:879 [inline] zap_present_folio_ptes mm/memory.c:1742 [inline] zap_present_ptes mm/memory.c:1824 [inline] do_zap_pte_range mm/memory.c:1926 [inline] zap_pte_range mm/memory.c:2028 [inline] zap_pmd_range mm/memory.c:2114 [inline] zap_pud_range mm/memory.c:2142 [inline] zap_p4d_range mm/memory.c:2163 [inline] __zap_vma_range+0x3a12/0x4f70 mm/memory.c:2203 unmap_vmas+0x38b/0x550 mm/memory.c:2272 exit_mmap+0x290/0xa40 mm/mmap.c:1315 __mmput+0x118/0x420 kernel/fork.c:1192 exit_mm+0x18e/0x240 kernel/exit.c:586 do_exit+0x6a8/0x2360 kernel/exit.c:967 do_group_exit+0x22d/0x2f0 kernel/exit.c:1123 get_signal+0x136a/0x1430 kernel/signal.c:3113 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline] do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f33be59fb19 Code: Unable to access opcode bytes at 0x7f33be59faef. RSP: 002b:00007f33bf5430e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f33be825fa8 RCX: 00007f33be59fb19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f33be825fa8 RBP: 00007f33be825fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f33be826038 R14: 00007ffd13f594f0 R15: 00007ffd13f595d8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026 RIP: 0010:__migrate_enable include/linux/sched.h:2473 [inline] RIP: 0010:migrate_enable include/linux/sched.h:2515 [inline] RIP: 0010:bpf_prog_run_array include/linux/bpf.h:2860 [inline] RIP: 0010:trace_call_bpf+0x636/0xb80 kernel/trace/bpf_trace.c:147 Code: 48 89 c8 48 05 b0 04 00 00 48 39 81 a0 04 00 00 4c 8b 74 24 18 0f 85 9d 02 00 00 e8 44 b4 f3 ff 48 8b 44 24 08 42 0f b6 04 28 <84> c0 0f 85 9f 04 00 00 66 41 c7 07 00 00 65 48 8b 05 14 ae 0c 13 RSP: 0018:ffffc90000a089e0 EFLAGS: 00000002 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88801f6d0000 RDX: 0000000001000101 RSI: 0000000001000101 RDI: ffff88801f6d04a0 RBP: ffffc90000a08ad8 R08: 0000000001000101 R09: 0000000000000000 R10: ffffc90000a08a60 R11: ffffffffa0409174 R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff92000141148 R15: ffff88801f6d04c0 FS: 0000000000000000(0000) GS:ffff8881234fe000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555564a8e4e8 CR3: 00000000321aa000 CR4: 00000000003526f0 Call Trace: perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11524 do_perf_trace_lock_acquire include/trace/events/lock.h:23 [inline] perf_trace_lock_acquire+0x346/0x440 include/trace/events/lock.h:23 __do_trace_lock_acquire include/trace/events/lock.h:23 [inline] trace_lock_acquire include/trace/events/lock.h:23 [inline] lock_acquire+0x303/0x350 kernel/locking/lockdep.c:5905 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:155 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:181 debug_object_activate+0xb7/0x420 lib/debugobjects.c:873 debug_hrtimer_activate kernel/time/hrtimer.c:486 [inline] debug_activate kernel/time/hrtimer.c:529 [inline] enqueue_hrtimer+0xa9/0x2c0 kernel/time/hrtimer.c:1137 __run_hrtimer kernel/time/hrtimer.c:2095 [inline] __hrtimer_run_queues+0x4ce/0xa10 kernel/time/hrtimer.c:2136 hrtimer_interrupt+0x4cd/0xaa0 kernel/time/hrtimer.c:2255 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline] __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1068 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:221 Code: f7 e8 0d 36 98 f5 f7 c3 00 02 00 00 74 05 e8 c0 d7 c4 f5 9c 58 a9 00 02 00 00 75 29 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 44 2a 89 f5 65 48 8b 05 ac 81 d5 08 48 85 c0 74 18 5b 41 5e c3 RSP: 0018:ffffc900001d7b48 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000296 RCX: 8000000000000101 RDX: 0000000000000000 RSI: ffffffff8e6aa9ad RDI: 0000000000000001 RBP: ffffc900001d7cc8 R08: ffffffff91be0dbf R09: 1ffffffff237c1b7 R10: dffffc0000000000 R11: fffffbfff237c1b8 R12: ffff888056833b00 R13: dffffc0000000000 R14: ffffffff9c0e7430 R15: ffff888056833488 debug_rcu_head_unqueue kernel/rcu/rcu.h:254 [inline] rcu_do_batch kernel/rcu/tree.c:2642 [inline] rcu_core+0x89a/0x1230 kernel/rcu/tree.c:2919 handle_softirqs+0x265/0x8d0 kernel/softirq.c:669 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1133 smpboot_thread_fn+0x5f8/0xb30 kernel/smpboot.c:162 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245