watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.4.1234:10974] Modules linked in: irq event stamp: 13811559 hardirqs last enabled at (13811558): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (13811559): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (12946124): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (12946124): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (12946124): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (12946127): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (12946127): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (12946127): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 10974 Comm: syz.4.1234 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline] RIP: 0010:unwind_next_frame+0x130e/0x2390 arch/x86/kernel/unwind_orc.c:494 Code: c1 e8 3f 48 01 c8 48 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 27 49 63 07 4c 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 RSP: 0018:ffffc900000076f8 EFLAGS: 00000a03 RAX: 0000000000000000 RBX: ffffffff8f993a94 RCX: dffffc0000000000 RDX: ffffffff8f993a88 RSI: ffffffff90181712 RDI: ffffffff8bbf0480 RBP: ffffffff8f993a88 R08: 0000000000000009 R09: ffffffff81738d25 R10: ffffc90000007308 R11: ffffffff81ac2cd0 R12: ffffffff8225ccbc R13: ffffffff8f993a88 R14: ffffc900000077c8 R15: ffffffff8f993a8c FS: 00007f07273126c0(0000) GS:ffff88812613e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f97a93b12f8 CR3: 0000000068ec4000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: ffffffffffffffff DR2: ffffffffffffffff DR3: ffffffffffffffff DR6: 00000000ffff0ff0 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: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:2530 [inline] slab_free mm/slub.c:6619 [inline] kmem_cache_free+0x19b/0x690 mm/slub.c:6729 rcu_do_batch kernel/rcu/tree.c:2605 [inline] rcu_core+0xcab/0x1770 kernel/rcu/tree.c:2861 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:perf_trace_buf_alloc+0x119/0x2a0 kernel/trace/trace_event_perf.c:415 Code: d0 bd 92 8d 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 87 2d 5c 00 4c 89 f0 48 c1 e8 03 4d 03 3c 24 42 80 3c 28 00 <74> 08 4c 89 f7 e8 5d 2e 5c 00 4d 89 3e 4c 8b 3c 24 eb 12 e8 5f 5c RSP: 0018:ffffc900052e7120 EFLAGS: 00000246 RAX: 1ffff92000a5ce38 RBX: 000000000000002c RCX: ffff8880597c5ac0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008 RBP: 0000000000000000 R08: ffffc900052e7407 R09: 0000000000000000 R10: ffffc900052e73f8 R11: fffff52000a5ce81 R12: ffffffff8d92bdd0 R13: dffffc0000000000 R14: ffffc900052e71c0 R15: ffff8880b88329c0 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x18d/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: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+0x3e/0x60 mm/kasan/common.c:56 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:559 __call_rcu_common kernel/rcu/tree.c:3123 [inline] call_rcu+0x157/0x9c0 kernel/rcu/tree.c:3243 context_switch kernel/sched/core.c:5328 [inline] __schedule+0x17a0/0x4cc0 kernel/sched/core.c:6929 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:7113 preempt_schedule+0xae/0xc0 kernel/sched/core.c:7137 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 refill_obj_stock+0x544/0x850 mm/memcontrol.c:3058 obj_cgroup_charge_account+0x116/0x660 mm/memcontrol.c:3104 __memcg_slab_post_alloc_hook+0x3db/0x7d0 mm/memcontrol.c:3188 memcg_slab_post_alloc_hook mm/slub.c:2329 [inline] slab_post_alloc_hook mm/slub.c:4973 [inline] slab_alloc_node mm/slub.c:5272 [inline] kmem_cache_alloc_lru_noprof+0x410/0x6d0 mm/slub.c:5291 sock_alloc_inode+0x28/0xc0 net/socket.c:322 alloc_inode+0x6a/0x1b0 fs/inode.c:346 new_inode_pseudo include/linux/fs.h:3395 [inline] sock_alloc net/socket.c:637 [inline] __sock_create+0x12d/0x9f0 net/socket.c:1569 sock_create net/socket.c:1663 [inline] __sys_socket_create net/socket.c:1700 [inline] __sys_socket+0xd7/0x1b0 net/socket.c:1747 __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: 0033:0x7f072638efc9 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:00007f0727312038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f07265e5fa0 RCX: 00007f072638efc9 RDX: 0000000000000002 RSI: 0000000000000003 RDI: 000000000000000f RBP: 00007f0726411f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f07265e6038 R14: 00007f07265e5fa0 R15: 00007ffeba168268 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5846 Comm: kworker/u9:8 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: hci2 hci_cmd_timeout RIP: 0010:do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] RIP: 0010:perf_trace_lock_acquire+0xde/0x410 include/trace/events/lock.h:24 Code: 85 c0 48 c7 c7 60 f7 6a 8b 48 0f 45 f8 48 89 7c 24 28 e8 25 57 a5 09 49 89 c5 49 8d 5e 60 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 a8 3a 89 00 48 8b 03 48 89 44 24 08 e8 ab b0 a9 RSP: 0018:ffffc90000a08a80 EFLAGS: 00000046 RAX: 1ffffffff1bc1804 RBX: ffffffff8de0c020 RCX: 000000008bee8105 RDX: 0000000000000000 RSI: ffff88802493d170 RDI: ffffffff8bee8100 RBP: ffffc90000a08b80 R08: 0000000000000000 R09: 0000000000000001 R10: dffffc0000000000 R11: ffffffff85f9f490 R12: 1ffff92000141158 R13: 0000000000000015 R14: ffffffff8de0bfc0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88812623e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f07272cff98 CR3: 0000000068ec4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __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 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162 virtscsi_vq_done+0xaf/0x180 drivers/scsi/virtio_scsi.c:184 vring_interrupt+0x221/0x380 drivers/virtio/virtio_ring.c:2718 __handle_irq_event_percpu+0x295/0xab0 kernel/irq/handle.c:203 handle_irq_event_percpu kernel/irq/handle.c:240 [inline] handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:257 handle_edge_irq+0x23b/0xa10 kernel/irq/chip.c:855 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline] handle_irq arch/x86/kernel/irq.c:254 [inline] call_irq_handler arch/x86/kernel/irq.c:-1 [inline] __common_interrupt+0x141/0x1f0 arch/x86/kernel/irq.c:325 common_interrupt+0xb6/0xe0 arch/x86/kernel/irq.c:318 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2034 [inline] RIP: 0010:vprintk_emit+0x49d/0x590 kernel/printk/printk.c:2422 Code: 0f 84 34 ff ff ff e8 92 ed 1f 00 fb eb 44 e8 8a ed 1f 00 e8 a5 1b a6 09 4d 85 f6 74 94 e8 7b ed 1f 00 fb 48 c7 c7 c0 12 f3 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 1b 3b RSP: 0018:ffffc9000409f700 EFLAGS: 00000293 RAX: ffffffff81a01675 RBX: ffffffff81a014ce RCX: ffff888075e29e40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8df312c0 RBP: ffffc9000409f810 R08: ffffffff8f7cd277 R09: 1ffffffff1ef9a4e R10: dffffc0000000000 R11: fffffbfff1ef9a4f R12: 0000000000000000 R13: 000000000000002a R14: 0000000000000200 R15: 1ffff92000813ee4 _printk+0xcf/0x120 kernel/printk/printk.c:2448 bt_err+0x10b/0x160 net/bluetooth/lib.c:296 hci_cmd_timeout+0xd8/0x1e0 net/bluetooth/hci_core.c:1469 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245