watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.4.19:6010] Modules linked in: irq event stamp: 13152029 hardirqs last enabled at (13152028): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (13152029): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (12949240): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (12949240): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (12949240): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (12949243): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (12949243): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (12949243): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 6010 Comm: syz.4.19 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216 Code: 8b 3d 24 c2 d2 0b 48 89 de 5b e9 33 97 5a 00 cc cc cc 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 0c 25 08 20 6e 92 65 8b 15 28 1c ae 10 81 e2 00 01 ff 00 RSP: 0018:ffffc90000a07eb8 EFLAGS: 00000246 RAX: ffffffff81f0e453 RBX: 0000000000000000 RCX: ffff888025811e40 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a08128 R08: ffffc90000a07f57 R09: 0000000000000000 R10: ffffc90000a07f48 R11: fffff52000140feb R12: 0000000000000000 R13: ffffc90000a07f48 R14: ffff8880b8932af0 R15: dffffc0000000000 FS: 00007f5ecff906c0(0000) GS:ffff88812623e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 000000007f5c4000 CR4: 00000000003526f0 Call Trace: perf_tp_event+0x5f3/0x1380 kernel/events/core.c:11000 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:10936 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 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:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4962 [inline] slab_alloc_node mm/slub.c:5272 [inline] kmem_cache_alloc_noprof+0x367/0x6e0 mm/slub.c:5279 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:3322 ndisc_send_skb+0x3f1/0x1510 net/ipv6/ndisc.c:491 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4037 call_timer_fn+0x17e/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:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7256 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 10 00 00 00 74 64 bf 01 00 00 00 e8 ab a4 48 f6 e8 36 77 80 f6 fb bf 01 00 00 00 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc90004c6f780 EFLAGS: 00000282 RAX: 55f1d1364eee2e00 RBX: 0000000000000000 RCX: 55f1d1364eee2e00 RDX: 0000000000000000 RSI: ffffffff8d70be22 RDI: 0000000000000001 RBP: ffffc90004c6f820 R08: ffffffff8f7cd277 R09: 1ffffffff1ef9a4e R10: dffffc0000000000 R11: fffffbfff1ef9a4f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200098def0 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_schedule_notrace+0x0/0x110 kernel/sched/core.c:7178 Code: ff ff ff 5b 41 5e 41 5f e9 bd ba 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:ffffc90004c6f8e8 EFLAGS: 00000246 RAX: 55f1d1364eee2e00 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffffc9000cdfa000 RSI: 0000000000006abb RDI: 0000000000006abc RBP: ffffc90004c6f938 R08: ffffc90004c6f5d7 R09: 0000000000000000 R10: ffffc90004c6f5c8 R11: fffff5200098debb R12: 0000000000000000 R13: ffffffff8ddf9620 R14: 0000000000000000 R15: 0000000000000001 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:471 [inline] __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x347/0x360 kernel/locking/lockdep.c:5831 sched_submit_work kernel/sched/core.c:6967 [inline] schedule+0xb1/0x360 kernel/sched/core.c:7025 futex_do_wait kernel/futex/waitwake.c:358 [inline] __futex_wait+0x1c3/0x3d0 kernel/futex/waitwake.c:687 futex_wait+0x104/0x360 kernel/futex/waitwake.c:715 do_futex+0x333/0x420 kernel/futex/syscalls.c:130 __do_sys_futex kernel/futex/syscalls.c:207 [inline] __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:188 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5ecf18efc9 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:00007f5ecff900e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f5ecf3e5fa8 RCX: 00007f5ecf18efc9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5ecf3e5fa8 RBP: 00007f5ecf3e5fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5ecf3e6038 R14: 00007ffe7a8c14b0 R15: 00007ffe7a8c1598 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6012 Comm: syz.2.20 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:tk_clock_read kernel/time/timekeeping.c:293 [inline] RIP: 0010:timekeeping_get_ns kernel/time/timekeeping.c:404 [inline] RIP: 0010:ktime_get_update_offsets_now+0x96/0x3d0 kernel/time/timekeeping.c:2559 Code: cf 17 44 89 fe 83 e6 01 31 ff e8 85 ab 11 00 44 89 f8 83 e0 01 0f 85 0d 03 00 00 e8 34 a7 11 00 49 89 ee 4c 8b 25 5a 47 cf 17 <4c> 8b 2d 2b 47 cf 17 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc RSP: 0018:ffffc90000007200 EFLAGS: 00000006 RAX: ffffffff81ae5cbc RBX: 1ffff11017104f84 RCX: ffff888026941e40 RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8880b8827d20 R08: ffffc90000006d97 R09: 0000000000000000 R10: ffffc90000006d88 R11: fffff52000000db3 R12: 00000033d168ef22 R13: 0000000000000000 R14: ffff8880b8827d20 R15: 000000000000a8e4 FS: 00007f63108206c0(0000) GS:ffff88812613e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff86b8b2ff8 CR3: 000000007f4fe000 CR4: 00000000003526f0 Call Trace: hrtimer_update_base kernel/time/hrtimer.c:633 [inline] hrtimer_interrupt+0x132/0xaa0 kernel/time/hrtimer.c:1885 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_release+0x2c7/0x3e0 kernel/locking/lockdep.c:5893 Code: 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 8b ba d0 10 48 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c <41> 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 0f 0b 90 e9 5d fd ff ff RSP: 0018:ffffc90000007490 EFLAGS: 00000282 RAX: 631d0f828e5b1000 RBX: ffffffff900b6001 RCX: 631d0f828e5b1000 RDX: 0000000000000002 RSI: ffffffff8d8f28e3 RDI: ffffffff8bbf04e0 RBP: ffff8880269429c0 R08: ffffc900000070d7 R09: 0000000000000000 R10: ffffc900000070c8 R11: fffff52000000e1b R12: ffffc90000007ff0 R13: 0000000000000002 R14: ffffffff8df3d2e0 R15: ffff888026941e40 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:897 [inline] class_rcu_destructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 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:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4962 [inline] slab_alloc_node mm/slub.c:5272 [inline] kmem_cache_alloc_node_noprof+0x433/0x710 mm/slub.c:5324 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:579 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:670 alloc_skb include/linux/skbuff.h:1383 [inline] ndisc_alloc_skb+0x9f/0x480 net/ipv6/ndisc.c:420 ndisc_send_rs+0x2b5/0x630 net/ipv6/ndisc.c:706 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4037 call_timer_fn+0x17e/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:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__kasan_check_read+0x4/0x20 mm/kasan/shadow.c:31 Code: de e8 40 c5 01 ff 31 ed eb cf cc cc cc cc cc cc cc cc cc cc cc cc 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 ef e4 ff ff 66 66 66 66 66 66 2e 0f 1f RSP: 0018:ffffc90004c8f2e0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 631d0f828e5b1000 RDX: 0000000000000007 RSI: 0000000000000008 RDI: ffffffff8f7cd270 RBP: ffffc90004c8f510 R08: ffffffff8f7cd277 R09: 1ffffffff1ef9a4e R10: dffffc0000000000 R11: fffffbfff1ef9a4f R12: dffffc0000000000 R13: 0000000000000000 R14: ffff888026941e40 R15: 1ffff11017107568 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] cpumask_test_cpu include/linux/cpumask.h:646 [inline] cpu_online include/linux/cpumask.h:1205 [inline] trace_sched_exit_tp+0x27/0x110 include/trace/events/sched.h:886 __schedule+0x17ae/0x4cc0 kernel/sched/core.c:6939 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688 RIP: 0010:__kasan_check_byte+0x7/0x40 mm/kasan/common.c:578 Code: da fe ff ff 48 ff c8 49 89 c4 e9 cf fe ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 41 56 53 <48> 89 f3 49 89 fe e8 2e 15 00 00 84 c0 75 16 be 01 00 00 00 4c 89 RSP: 0018:ffffc90004c8f680 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 631d0f828e5b1000 RDX: 0000000000000000 RSI: ffffffff81738d42 RDI: ffffffff8df3d2e0 RBP: ffffffff81738d25 R08: 0000000000000002 R09: 0000000000000000 R10: ffffc90004c8f348 R11: ffffffff81ac2cd0 R12: 0000000000000002 R13: ffffffff8df3d2e0 R14: 0000000000000000 R15: 0000000000000000 kasan_check_byte include/linux/kasan.h:401 [inline] lock_acquire+0x8d/0x360 kernel/locking/lockdep.c:5842 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 save_stack+0xf5/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2906 __slab_free+0x2e7/0x390 mm/slub.c:5954 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4962 [inline] slab_alloc_node mm/slub.c:5272 [inline] kmem_cache_alloc_noprof+0x367/0x6e0 mm/slub.c:5279 lsm_file_alloc security/security.c:739 [inline] security_file_alloc+0x34/0x330 security/security.c:2927 init_file+0x93/0x2f0 fs/file_table.c:159 alloc_empty_file+0x6e/0x1d0 fs/file_table.c:241 alloc_file fs/file_table.c:354 [inline] alloc_file_pseudo+0x13d/0x210 fs/file_table.c:383 sock_alloc_file+0xb8/0x2e0 net/socket.c:483 sock_map_fd net/socket.c:513 [inline] __sys_socket+0x13d/0x1b0 net/socket.c:1756 __do_sys_socket net/socket.c:1761 [inline] __se_sys_socket net/socket.c:1759 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1759 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f630f98efc9 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:00007f6310820038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f630fbe5fa0 RCX: 00007f630f98efc9 RDX: 0000000000000006 RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007f630fa11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f630fbe6038 R14: 00007f630fbe5fa0 R15: 00007ffca71ece68