watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.0.6373:26457] Modules linked in: irq event stamp: 7887353 hardirqs last enabled at (7887352): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (7887353): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (6966): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (6966): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (6966): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (6969): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (6969): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (6969): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 26457 Comm: syz.0.6373 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__read_once_word_nocheck+0x3/0x10 include/asm-generic/rwonce.h:67 Code: b2 00 48 ba 00 00 00 00 00 fc ff df e9 88 fc ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 07 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000007010 EFLAGS: 00000202 RAX: ffffffff81ad59ce RBX: ffffc90000007b98 RCX: 1ffff92000000e01 RDX: ffffffff90682fc8 RSI: 0000000000000002 RDI: ffffc90000007b98 RBP: 1ffff92000000e1e R08: 0000000000000001 R09: ffffffff81738c45 R10: ffffc90000007138 R11: ffffffff81ac2e10 R12: ffffc90000008000 R13: 1ffff92000000e1f R14: ffffc900000070e8 R15: ffffc90000000000 FS: 00007f6e752516c0(0000) GS:ffff888126139000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32405ff8 CR3: 000000005405c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: deref_stack_reg arch/x86/kernel/unwind_orc.c:406 [inline] unwind_next_frame+0xc3c/0x2390 arch/x86/kernel/unwind_orc.c:585 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 __set_page_owner+0x8d/0x4c0 mm/page_owner.c:332 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x234/0x290 mm/page_alloc.c:1845 prep_new_page mm/page_alloc.c:1853 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3879 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5178 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:3059 [inline] allocate_slab+0x96/0x350 mm/slub.c:3232 new_slab mm/slub.c:3286 [inline] ___slab_alloc+0xf56/0x1990 mm/slub.c:4655 __slab_alloc+0x65/0x100 mm/slub.c:4778 __slab_alloc_node mm/slub.c:4854 [inline] slab_alloc_node mm/slub.c:5276 [inline] kmem_cache_alloc_node_noprof+0x4c5/0x710 mm/slub.c:5340 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:660 alloc_skb include/linux/skbuff.h:1383 [inline] new_skb+0x2f/0x2b0 drivers/block/aoe/aoecmd.c:66 aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:430 [inline] aoecmd_cfg+0x28b/0x7c0 drivers/block/aoe/aoecmd.c:1374 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 5b 23 48 f6 e8 b6 f6 7f 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:ffffc900035f7600 EFLAGS: 00000286 RAX: 1f41a451d22e6500 RBX: 0000000000000000 RCX: 1f41a451d22e6500 RDX: 0000000000000006 RSI: ffffffff8d70e869 RDI: 0000000000000001 RBP: ffffc900035f76b0 R08: ffffffff8f7cef77 R09: 1ffffffff1ef9dee R10: dffffc0000000000 R11: fffffbfff1ef9def R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920006beec0 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:lock_is_held_type+0x137/0x190 kernel/locking/lockdep.c:5945 Code: 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 05 09 ca 27 07 <48> 3b 44 24 08 75 43 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc900035f7778 EFLAGS: 00000206 RAX: 1f41a451d22e6500 RBX: 0000000000000001 RCX: 1f41a451d22e6500 RDX: ffff8880256f3c80 RSI: ffffffff8d8f55b7 RDI: ffffffff8bbf08e0 RBP: 00000000ffffffff R08: 000000000000441f R09: 0000000000000006 R10: dffffc0000000000 R11: fffff520006bef0a R12: 0000000000000246 R13: ffff8880256f3c80 R14: ffffffff8dde8948 R15: 0000000000000006 lock_is_held include/linux/lockdep.h:249 [inline] text_poke arch/x86/kernel/alternative.c:2610 [inline] smp_text_poke_batch_finish+0x8c5/0x1130 arch/x86/kernel/alternative.c:2945 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x250 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 tracepoint_add_func+0x994/0xa10 kernel/tracepoint.c:315 tracepoint_probe_register_prio kernel/tracepoint.c:464 [inline] tracepoint_probe_register+0x5d/0x90 kernel/tracepoint.c:484 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline] perf_trace_event_init+0x4e1/0x9d0 kernel/trace/trace_event_perf.c:202 perf_trace_init+0x23d/0x2d0 kernel/trace/trace_event_perf.c:226 perf_tp_event_init+0x8d/0x120 kernel/events/core.c:10872 perf_try_init_event+0x17f/0x870 kernel/events/core.c:12615 perf_init_event kernel/events/core.c:12713 [inline] perf_event_alloc+0x133e/0x2be0 kernel/events/core.c:12988 __do_sys_perf_event_open kernel/events/core.c:13506 [inline] __se_sys_perf_event_open+0x772/0x1d70 kernel/events/core.c:13387 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: 0033:0x7f6e7438f749 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:00007f6e75251038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f6e745e6180 RCX: 00007f6e7438f749 RDX: ffffffffffffffff RSI: 0000000000000020 RDI: 0000200000000640 RBP: 00007f6e74413f91 R08: 0000000000000002 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6e745e6218 R14: 00007f6e745e6180 R15: 00007ffd82a60bc8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 26453 Comm: syz.0.6373 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__asan_memset+0x2f/0x50 mm/kasan/shadow.c:87 Code: 41 56 53 48 89 d3 89 f5 49 89 fe 48 8b 4c 24 18 48 89 d6 ba 01 00 00 00 e8 7e e4 ff ff 84 c0 74 11 4c 89 f7 89 ee 48 89 da 5b <41> 5e 5d e9 c9 fd 20 09 31 c0 5b 41 5e 5d e9 0e bc 23 09 cc 66 66 RSP: 0018:ffffc90000a07cd0 EFLAGS: 00000002 RAX: 305b20282aeeab01 RBX: ffff88806a31d8e8 RCX: ffffffff8492f338 RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc90000a07d00 RBP: 0000000000000000 R08: ffffc90000a07d0f R09: 1ffff92000140fa1 R10: dffffc0000000000 R11: fffff52000140fa2 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffffc90000a07d00 R15: ffff8880b8927b40 FS: 00007f6e752726c0(0000) GS:ffff888126239000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f77a1200218 CR3: 000000005405c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: debug_object_activate+0x38/0x420 lib/debugobjects.c:806 debug_hrtimer_activate kernel/time/hrtimer.c:438 [inline] debug_activate kernel/time/hrtimer.c:477 [inline] enqueue_hrtimer+0x30/0x3a0 kernel/time/hrtimer.c:1081 __run_hrtimer kernel/time/hrtimer.c:1794 [inline] __hrtimer_run_queues+0x656/0xc60 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903 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:hlist_empty include/linux/list.h:984 [inline] RIP: 0010:do_perf_trace_lock include/trace/events/lock.h:50 [inline] RIP: 0010:perf_trace_lock+0x158/0x3b0 include/trace/events/lock.h:50 Code: 89 4c 24 10 42 80 3c 38 00 74 08 4c 89 f7 e8 bf 24 89 00 49 83 3e 00 75 25 48 8b 5c 24 10 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 9e 24 89 00 48 83 3b 00 0f 84 95 01 00 00 48 8d RSP: 0018:ffffc90000a08120 EFLAGS: 00000246 RAX: 1ffffd1ffffa6969 RBX: ffffe8ffffd34b48 RCX: ffffe8ffffd34b48 RDX: ffffffff81738c45 RSI: ffffffff8bbf08c0 RDI: ffffffff8bbf0880 RBP: ffffc90000a08220 R08: ffffc90003986bd0 R09: 0000000000000000 R10: ffffc90000a083b8 R11: fffff52000141079 R12: 1ffff9200014102c R13: 000000000000000d R14: ffffffff8de0c328 R15: dffffc0000000000 __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:5879 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 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2543 [inline] slab_free mm/slub.c:6642 [inline] kmem_cache_free+0x19b/0x690 mm/slub.c:6752 skb_release_data+0x62d/0x7c0 net/core/skbuff.c:1087 skb_release_all net/core/skbuff.c:1152 [inline] __kfree_skb net/core/skbuff.c:1166 [inline] sk_skb_reason_drop+0x127/0x170 net/core/skbuff.c:1204 kfree_skb_reason include/linux/skbuff.h:1322 [inline] kfree_skb include/linux/skbuff.h:1331 [inline] ip6_mc_input+0x8de/0xb70 net/ipv6/ip6_input.c:593 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318 __netif_receive_skb_one_core net/core/dev.c:6079 [inline] __netif_receive_skb+0xd3/0x380 net/core/dev.c:6192 process_backlog+0x60e/0x14f0 net/core/dev.c:6544 __napi_poll+0xc7/0x360 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [inline] net_rx_action+0x5f7/0xdf0 net/core/dev.c:7784 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:schedule_debug kernel/sched/core.c:5905 [inline] RIP: 0010:__schedule+0x276/0x4cc0 kernel/sched/core.c:6806 Code: 74 28 80 3d 38 60 1f 04 00 75 1f c6 05 2f 60 1f 04 01 48 c7 c7 c0 4b 6a 8b be 11 17 00 00 48 c7 c2 c0 54 6a 8b e8 ea 02 56 f6 25 2f ff ff 85 c0 74 46 48 c7 c7 a0 d7 f3 8d be ff ff ff ff e8 RSP: 0018:ffffc90003985fc0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc90003980000 RCX: 305b20282aeeab00 RDX: 0000000000000000 RSI: ffffffff8d8f55b7 RDI: ffffffff8bbf08e0 RBP: ffffc900039861d0 R08: ffffffff8f7cef77 R09: 1ffffffff1ef9dee R10: dffffc0000000000 R11: fffffbfff1ef9def R12: ffff888126239000 R13: 0000000000000001 R14: ffff8880256f0000 R15: 1ffff11017127568 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256 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:lock_release+0x364/0x3e0 kernel/locking/lockdep.c:-1 Code: 7b 8d e8 ef b9 e5 ff 90 0f 0b 90 90 e9 ff fd ff ff e8 10 3b a9 09 48 c7 c7 10 e1 e0 8d 4c 89 ee e8 b1 ab 24 03 e9 a8 fd ff ff 0f 1e fa 4d 89 f7 4c 89 eb 65 8b 05 3f 0a d1 10 83 f8 08 73 55 RSP: 0018:ffffc90003986350 EFLAGS: 00000286 RAX: 305b20282aeeab00 RBX: ffffc90003986401 RCX: 305b20282aeeab00 RDX: ffffffff90183901 RSI: ffffffff81738c45 RDI: ffffffff8df3d6e0 RBP: dffffc0000000000 R08: ffffc900039864e7 R09: 0000000000000000 R10: ffffc900039864d8 R11: fffff52000730c9d R12: ffffc90003986820 R13: ffffffff81738c45 R14: ffffffff8df3d6e0 R15: ffffffff81738c45 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 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2543 [inline] slab_free mm/slub.c:6642 [inline] kmem_cache_free+0x19b/0x690 mm/slub.c:6752 netlink_broadcast_filtered+0xec7/0x1000 net/netlink/af_netlink.c:1537 nlmsg_multicast_filtered include/net/netlink.h:1165 [inline] nlmsg_multicast include/net/netlink.h:1184 [inline] nlmsg_notify+0xf0/0x1a0 net/netlink/af_netlink.c:2595 __dev_notify_flags+0xf4/0x2e0 net/core/dev.c:9672 netif_change_flags+0xe8/0x1a0 net/core/dev.c:9705 do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3151 rtnl_group_changelink net/core/rtnetlink.c:3783 [inline] __rtnl_newlink net/core/rtnetlink.c:3937 [inline] rtnl_newlink+0x14ad/0x1c80 net/core/rtnetlink.c:4065 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6951 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 ____sys_sendmsg+0x505/0x830 net/socket.c:2630 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684 __sys_sendmsg net/socket.c:2716 [inline] __do_sys_sendmsg net/socket.c:2721 [inline] __se_sys_sendmsg net/socket.c:2719 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719 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: 0033:0x7f6e7438f749 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:00007f6e75272038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f6e745e6090 RCX: 00007f6e7438f749 RDX: 0000000000000000 RSI: 0000200000000180 RDI: 0000000000000011 RBP: 00007f6e74413f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6e745e6128 R14: 00007f6e745e6090 R15: 00007ffd82a60bc8