watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.4.33:6017] Modules linked in: irq event stamp: 10817837 hardirqs last enabled at (10817836): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (10817837): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (9916130): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (9916130): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (9916130): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (9916133): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (9916133): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (9916133): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6017 Comm: syz.4.33 Not tainted 6.15.0-syzkaller-gf66b4aaff254 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:unwind_next_frame+0x15/0x2390 arch/x86/kernel/unwind_orc.c:469 Code: 00 eb 88 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 81 ec 98 00 00 00 <49> 89 fe 48 bd 00 00 00 00 00 fc ff df 48 8d 5f 48 48 89 d8 48 c1 RSP: 0018:ffffc90000007378 EFLAGS: 00000296 RAX: 0000000000000001 RBX: ffffc90000007500 RCX: c5add98fa7668400 RDX: dffffc0000000000 RSI: ffffffff8b672a50 RDI: ffffc90000007448 RBP: ffffc900000074d0 R08: ffffc90000007510 R09: 000000000000000f R10: ffffc90000007120 R11: ffffffff81acf670 R12: ffff88803053bc00 R13: ffff8880741028c0 R14: ffffffff81acf670 R15: ffffc90000007448 FS: 00007fd3d30266c0(0000) GS:ffff888125c54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3070aff8 CR3: 0000000028cc8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204 dst_alloc+0x105/0x170 net/core/dst.c:89 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x75/0x420 net/ipv6/route.c:3324 ndisc_send_skb+0x41f/0x1400 net/ipv6/ndisc.c:493 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4041 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7108 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 4b ab 29 f6 e8 26 c3 60 f6 fb bf 01 00 00 00 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc9000521f7c0 EFLAGS: 00000282 RAX: c5add98fa7668400 RBX: 0000000000000000 RCX: c5add98fa7668400 RDX: 0000000000000006 RSI: ffffffff8d97cf77 RDI: 0000000000000001 RBP: ffffc9000521f860 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: fffffbfff1f4203f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000a43ef8 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_schedule_notrace+0x0/0x110 kernel/sched/core.c:7030 Code: ff ff ff 5b 41 5e 41 5f e9 3d b1 01 00 cc 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 48 89 e5 41 57 41 56 53 48 83 e4 e0 48 83 ec 60 65 RSP: 0018:ffffc9000521f920 EFLAGS: 00010246 RAX: c5add98fa7668400 RBX: ffffffff8b672311 RCX: 0000000000000000 RDX: ffffc9000cf2a000 RSI: 00000000000013c7 RDI: 00000000000013c8 RBP: ffffc9000521f970 R08: ffffc9000521f7af R09: 0000000000000000 R10: ffffc9000521f7a0 R11: ffffffffa0202f10 R12: ffff88803053bc2c R13: ffffffff8b672311 R14: ffffffff8dffafa0 R15: ffffffff8dffafa0 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:482 [inline] __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3ca/0x3e0 kernel/locking/lockdep.c:5882 sched_submit_work kernel/sched/core.c:6844 [inline] schedule+0x142/0x360 kernel/sched/core.c:6877 futex_do_wait kernel/futex/waitwake.c:358 [inline] __futex_wait+0x1c3/0x3e0 kernel/futex/waitwake.c:687 futex_wait+0x104/0x360 kernel/futex/waitwake.c:715 do_futex+0x333/0x420 kernel/futex/syscalls.c:102 __do_sys_futex kernel/futex/syscalls.c:179 [inline] __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:160 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd3d218e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd3d30260e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007fd3d23b5fa8 RCX: 00007fd3d218e929 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd3d23b5fa8 RBP: 00007fd3d23b5fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd3d23b5fac R13: 0000000000000000 R14: 00007ffebb390220 R15: 00007ffebb390308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6012 Comm: syz.3.32 Not tainted 6.15.0-syzkaller-gf66b4aaff254 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:trace_call_bpf+0x21/0x850 kernel/trace/bpf_trace.c:111 Code: 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec c0 00 00 00 48 89 74 24 28 <49> 89 ff 65 48 8b 05 e4 3b d1 10 48 89 84 24 a0 00 00 00 48 b9 00 RSP: 0018:ffffc90000a07a20 EFLAGS: 00000082 RAX: 1ffffd1ffffb4800 RBX: 0000000000000002 RCX: ffff8880296e5a00 RDX: 0000000000010100 RSI: ffffe8ffffda4000 RDI: ffffffff8e00e1e0 RBP: ffffc90000a07b18 R08: 0000000000000001 R09: ffff8880b8732ab0 R10: 3e2d735f5f5f5f26 R11: 746e756f63716573 R12: ffffe8ffffda4000 R13: ffffffff8e00e1e0 R14: ffff8880b8732ab0 R15: ffffffff8e00e248 FS: 00007fb1ba5446c0(0000) GS:ffff888125d54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe309284e9c CR3: 0000000035108000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10866 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5882 seqcount_lockdep_reader_access+0xdc/0x1c0 include/linux/seqlock.h:73 ktime_get+0x3e/0x1f0 kernel/time/timekeeping.c:776 clockevents_program_event+0xea/0x360 kernel/time/clockevents.c:326 hrtimer_interrupt+0x620/0xaa0 kernel/time/hrtimer.c:1900 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:unwind_next_frame+0x374/0x2390 arch/x86/kernel/unwind_orc.c:505 Code: ea 48 01 d2 48 01 f2 48 bd 00 00 00 00 00 fc ff df 0f 84 37 01 00 00 4c 8d 62 04 4c 8d 6a 05 4c 89 e0 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 6d 19 00 00 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f RSP: 0018:ffffc90000a08038 EFLAGS: 00000a03 RAX: 0000000000000000 RBX: ffffffff8faef108 RCX: ffffffff8faef10c RDX: ffffffff902766d0 RSI: ffffffff90276670 RDI: ffffffff8be287a0 RBP: dffffc0000000000 R08: 0000000000000018 R09: ffffffff81729de5 R10: ffffc90000a07de0 R11: ffffffff81acf670 R12: ffffffff902766d4 R13: ffffffff902766d5 R14: ffffc90000a08108 R15: ffffffff8faef108 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4249 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:579 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:670 alloc_skb include/linux/skbuff.h:1336 [inline] nlmsg_new include/net/netlink.h:1041 [inline] __neigh_notify+0x15c/0x310 net/core/neighbour.c:3450 neigh_cleanup_and_release+0xb0/0x290 net/core/neighbour.c:119 neigh_remove_one+0x46d/0x4c0 net/core/neighbour.c:239 neigh_forced_gc net/core/neighbour.c:270 [inline] neigh_alloc net/core/neighbour.c:464 [inline] ___neigh_create+0x485/0x2260 net/core/neighbour.c:607 ip6_finish_output2+0xb4d/0x16a0 net/ipv6/ip6_output.c:132 __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline] ip6_finish_output+0x234/0x7d0 net/ipv6/ip6_output.c:226 NF_HOOK include/linux/netfilter.h:317 [inline] ndisc_send_skb+0xb47/0x1400 net/ipv6/ndisc.c:513 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4041 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:write_comp_data kernel/kcov.c:245 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x90 kernel/kcov.c:314 Code: 48 89 44 11 20 c3 cc cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 14 25 08 c0 9c 92 65 8b 0d 88 5a dc 10 81 e1 00 01 ff 00 RSP: 0018:ffffc900051df1a0 EFLAGS: 00000246 RAX: ffffffff81f0b234 RBX: 0000000000000000 RCX: e23a94b84dff0f00 RDX: 0000000000000008 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffc900051df12f R09: 0000000000000000 R10: ffffc900051df120 R11: ffffffffa0202f10 R12: ffffe8ffffd94000 R13: ffffffff8e00e1e0 R14: ffff8880b8732960 R15: 0000000000000000 perf_trace_run_bpf_submit+0x84/0x170 kernel/events/core.c:10866 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5882 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] page_table_check_set+0x51d/0x730 mm/page_table_check.c:124 page_table_check_ptes_set include/linux/page_table_check.h:76 [inline] set_ptes include/linux/pgtable.h:292 [inline] __copy_present_ptes mm/memory.c:973 [inline] copy_present_ptes mm/memory.c:1056 [inline] copy_pte_range mm/memory.c:1179 [inline] copy_pmd_range+0x4262/0x7000 mm/memory.c:1267 copy_pud_range mm/memory.c:1304 [inline] copy_p4d_range mm/memory.c:1328 [inline] copy_page_range+0xc46/0x1270 mm/memory.c:1416 dup_mmap+0xf57/0x1ac0 mm/mmap.c:1838 dup_mm kernel/fork.c:1477 [inline] copy_mm+0x13c/0x4b0 kernel/fork.c:1529 copy_process+0x1706/0x3c00 kernel/fork.c:2169 kernel_clone+0x21e/0x870 kernel/fork.c:2599 __do_sys_clone kernel/fork.c:2742 [inline] __se_sys_clone kernel/fork.c:2726 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2726 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb1b978e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb1ba543fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fb1b99b5fa0 RCX: 00007fb1b978e929 RDX: 0000200000001580 RSI: 0000200000001550 RDI: 0000000080000000 RBP: 00007fb1b9810b39 R08: 0000200000001600 R09: 0000200000001600 R10: 00002000000015c0 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb1b99b5fa0 R15: 00007fffb8c9d248