watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.1.1300:11804] Modules linked in: irq event stamp: 13562335 hardirqs last enabled at (13562334): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (13562335): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (12227524): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (12227524): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (12227524): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (12227527): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (12227527): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (12227527): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 11804 Comm: syz.1.1300 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:arch_stack_walk+0x113/0x150 arch/x86/kernel/stacktrace.c:25 Code: 00 74 38 4c 8d bd 78 ff ff ff 4c 89 ff e8 15 6d 09 00 48 85 c0 74 24 48 89 df 48 89 c6 4d 89 f3 2e 2e 2e 41 ff d3 84 c0 74 11 <4c> 89 ff e8 45 6e 09 00 83 bd 78 ff ff ff 00 75 cf 65 48 8b 05 14 RSP: 0018:ffffc90000a08348 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffc90000a08400 RCX: 0000000000000100 RDX: dffffc0000000000 RSI: ffffffff81b0bf39 RDI: ffffc90000a08400 RBP: ffffc90000a083d0 R08: ffffc90000a08410 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffffff81b0bfa0 R12: ffff88801ff59e80 R13: ffff8880b8738b28 R14: ffffffff81b0bfa0 R15: ffffc90000a08348 FS: 00007fe1777f66c0(0000) GS:ffff888125563000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3a857f CR3: 0000000078bfa000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4542 [inline] kmem_cache_alloc_bulk_noprof+0x570/0x7e0 mm/slub.c:7291 napi_skb_cache_get+0x41e/0x780 net/core/skbuff.c:292 __alloc_skb+0x146/0x7d0 net/core/skbuff.c:691 napi_alloc_skb+0x7a/0xaf0 net/core/skbuff.c:853 page_to_skb+0x2ce/0x870 drivers/net/virtio_net.c:887 receive_mergeable drivers/net/virtio_net.c:2497 [inline] receive_buf+0x546/0x1900 drivers/net/virtio_net.c:2643 virtnet_receive_packets drivers/net/virtio_net.c:2970 [inline] virtnet_receive drivers/net/virtio_net.c:2994 [inline] virtnet_poll+0x219e/0x2f90 drivers/net/virtio_net.c:3083 __napi_poll+0xae/0x340 net/core/dev.c:7692 napi_poll net/core/dev.c:7755 [inline] net_rx_action+0x627/0xf70 net/core/dev.c:7912 handle_softirqs+0x22a/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:124 [inline] RIP: 0010:lock_is_held_type+0x37/0x150 kernel/locking/lockdep.c:5933 Code: 53 bb ff ff ff ff 83 3d e6 cb 63 04 00 0f 84 e4 00 00 00 65 8b 05 c9 20 6e 07 85 c0 0f 85 d5 00 00 00 65 4c 8b 2d 11 db 6d 07 <41> 83 bd 54 0b 00 00 00 0f 85 bf 00 00 00 89 f5 49 89 fe 9c 41 5c RSP: 0018:ffffc9000465ee48 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffff88801ff59e80 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8e75e4a0 RBP: ffffc9000465f080 R08: ffffffff90118db7 R09: 1ffffffff20231b6 R10: dffffc0000000000 R11: fffffbfff20231b7 R12: ffff888125563000 R13: ffff88801ff59e80 R14: dffffc0000000000 R15: 1ffff110170e75b3 lock_is_held include/linux/lockdep.h:249 [inline] schedule_debug kernel/sched/core.c:5874 [inline] __schedule+0x262/0x52d0 kernel/sched/core.c:6783 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7092 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline] _raw_spin_unlock_irqrestore+0x74/0x80 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:407 [inline] __slab_free+0x211/0x2b0 mm/slub.c:-1 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4542 [inline] slab_alloc_node mm/slub.c:4869 [inline] __do_kmalloc_node mm/slub.c:5262 [inline] __kmalloc_node_noprof+0x498/0x7c0 mm/slub.c:5269 kmalloc_node_noprof include/linux/slab.h:1081 [inline] crypto_alloc_tfmmem crypto/api.c:515 [inline] crypto_create_tfm_node+0x83/0x3f0 crypto/api.c:535 crypto_alloc_tfm_node+0x172/0x3f0 crypto/api.c:643 esp_init_authenc net/ipv6/esp6.c:1081 [inline] esp6_init_state+0x63c/0x1240 net/ipv6/esp6.c:1151 __xfrm_init_state+0xac9/0x1460 net/xfrm/xfrm_state.c:3202 xfrm_init_state+0x18/0xa0 net/xfrm/xfrm_state.c:3245 pfkey_msg2xfrm_state net/key/af_key.c:1286 [inline] pfkey_add+0x1d34/0x2df0 net/key/af_key.c:1504 pfkey_process net/key/af_key.c:2848 [inline] pfkey_sendmsg+0xc56/0x1120 net/key/af_key.c:3699 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2592 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2683 [inline] __se_sys_sendmsg net/socket.c:2681 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2681 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe17959c799 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe1777f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe179815fa0 RCX: 00007fe17959c799 RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000007 RBP: 00007fe179632c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe179816038 R14: 00007fe179815fa0 R15: 00007ffd7162f4f8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5832 Comm: kworker/u9:4 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: hci0 hci_cmd_timeout RIP: 0010:strlen+0x1f/0x70 lib/string.c:420 Code: 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb <49> 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 11 48 ff c3 RSP: 0018:ffffc90000007b18 EFLAGS: 00000002 RAX: 0000000000000010 RBX: ffffffff8c27bad1 RCX: 000000008c27ba00 RDX: 0000000000000000 RSI: ffffffff9a5232f0 RDI: ffffffff8c27bac0 RBP: ffffc90000007c38 R08: 0000000000000000 R09: 0000000000000001 R10: dffffc0000000000 R11: ffffffff816b26b0 R12: ffffffff8e62a340 R13: ffffffff9a5232f0 R14: dffffc0000000000 R15: 000000000000000f FS: 0000000000000000(0000) GS:ffff888125463000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000e8000 CR3: 000000007b6e2000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __fortify_strlen include/linux/fortify-string.h:266 [inline] trace_event_get_offsets_lock_acquire include/trace/events/lock.h:24 [inline] do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0xde/0x440 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+0x2a4/0x2e0 kernel/locking/lockdep.c:5831 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 debug_object_deactivate+0x6c/0x3a0 lib/debugobjects.c:890 debug_hrtimer_deactivate kernel/time/hrtimer.c:451 [inline] __run_hrtimer kernel/time/hrtimer.c:1753 [inline] __hrtimer_run_queues+0x2c5/0xcc0 kernel/time/hrtimer.c:1849 hrtimer_interrupt+0x42b/0x1010 kernel/time/hrtimer.c:1911 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x102/0x460 arch/x86/kernel/apic/apic.c:1062 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2039 [inline] RIP: 0010:vprintk_emit+0x45d/0x560 kernel/printk/printk.c:2478 Code: 0f 84 44 ff ff ff e8 42 2d 21 00 fb eb 44 e8 3a 2d 21 00 e8 15 82 09 0a 4d 85 f6 74 94 e8 2b 2d 21 00 fb 48 c7 c7 20 08 75 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 cb 16 RSP: 0018:ffffc90003ca7800 EFLAGS: 00000293 RAX: ffffffff81a47085 RBX: ffffffff81a46eff RCX: ffff888072a05b80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e750820 RBP: ffffc90003ca78b0 R08: ffffffff90118db7 R09: 1ffffffff20231b6 R10: dffffc0000000000 R11: fffffbfff20231b7 R12: 0000000000000000 R13: 000000000000002a R14: 0000000000000200 R15: 1ffff92000794f04 _printk+0xdd/0x130 kernel/printk/printk.c:2504 bt_err+0x121/0x180 net/bluetooth/lib.c:296 hci_cmd_timeout+0xd8/0x1e0 net/bluetooth/hci_core.c:1470 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245