watchdog: BUG: soft lockup - CPU#1 stuck for 24s! [kworker/u8:2:41] Modules linked in: irq event stamp: 1282800 hardirqs last enabled at (1282799): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (1282799): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (1282800): [] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline] hardirqs last disabled at (1282800): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668 softirqs last enabled at (1282750): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (1282750): [] batadv_nc_purge_paths+0x2f4/0x37c net/batman-adv/network-coding.c:471 softirqs last disabled at (1282748): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (1282748): [] batadv_nc_purge_paths+0xd0/0x37c net/batman-adv/network-coding.c:442 CPU: 1 UID: 0 PID: 41 Comm: kworker/u8:2 Not tainted 6.16.0-rc5-syzkaller-00067-gec4801305969 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_unbound toggle_allocation_gate pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : csd_lock_wait kernel/smp.c:340 [inline] pc : smp_call_function_many_cond+0xf08/0x1434 kernel/smp.c:885 lr : csd_lock_wait kernel/smp.c:340 [inline] lr : smp_call_function_many_cond+0xf20/0x1434 kernel/smp.c:885 sp : ffff8000990e7720 x29: ffff8000990e7830 x28: 0000000000000011 x27: dfff800000000000 x26: 0000000000000000 x25: ffff80008f671ff8 x24: ffff00019beda940 x23: ffffffffffffffff x22: 1fffe000337db528 x21: 1fffe000337db529 x20: ffff00019bebce68 x19: ffff00019beda948 x18: 1fffe000337d8876 x17: ffff80008f66e000 x16: ffff80008aefc458 x15: 0000000000000001 x14: 1fffe000337d79cd x13: 0000000000000000 x12: 0000000000000000 x11: ffff6000337d79ce x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000011 x7 : ffff800080230268 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff800080679514 x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:231 [inline] (P) __cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline] (P) csd_lock_wait kernel/smp.c:340 [inline] (P) smp_call_function_many_cond+0xf08/0x1434 kernel/smp.c:885 (P) smp_call_function_many kernel/smp.c:909 [inline] smp_call_function kernel/smp.c:931 [inline] kick_all_cpus_sync+0x40/0xa0 kernel/smp.c:1076 arch_jump_label_transform_apply+0x14/0x20 arch/arm64/kernel/jump_label.c:34 __jump_label_update+0x30c/0x334 kernel/jump_label.c:521 jump_label_update+0x3f0/0x484 kernel/jump_label.c:919 static_key_disable_cpuslocked+0xd0/0x1e0 kernel/jump_label.c:240 static_key_disable+0x24/0x38 kernel/jump_label.c:248 toggle_allocation_gate+0x1a4/0x240 mm/kfence/core.c:855 process_one_work+0x7e8/0x155c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3402 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:843 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 7910 Comm: syz-executor Not tainted 6.16.0-rc5-syzkaller-00067-gec4801305969 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : memory_is_poisoned_n mm/kasan/generic.c:130 [inline] pc : memory_is_poisoned mm/kasan/generic.c:161 [inline] pc : check_region_inline mm/kasan/generic.c:180 [inline] pc : kasan_check_range+0x3c/0x2a4 mm/kasan/generic.c:189 lr : __kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37 sp : ffff80009de377e0 x29: ffff80009de377e0 x28: 1fffe0001b697a4c x27: 1fffe0001a26b3d2 x26: ffff0000d1359e80 x25: 1fffe0001b697a4d x24: dfff800000000000 x23: 00000000ffffffff x22: ffff0000d1359e90 x21: ffff0000db4bd260 x20: ffff0000db4bd268 x19: ffff0000db4bd258 x18: 1fffe000337d4076 x17: ffff80008f66e000 x16: ffff80008052c6a8 x15: 0000000000000001 x14: 1fffe0001b697a4b x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001b697a4c x10: fffffffffffffff8 x9 : ffff000000000000 x8 : ffff80009de37844 x7 : ffff800080d92e28 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008052c7c0 x2 : 0000000000000001 x1 : 0000000000000004 x0 : ffff80009de37840 Call trace: check_region_inline mm/kasan/generic.c:177 [inline] (P) kasan_check_range+0x3c/0x2a4 mm/kasan/generic.c:189 (P) __kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1301 [inline] queued_spin_lock include/asm-generic/qspinlock.h:111 [inline] do_raw_spin_lock+0x118/0x2cc kernel/locking/spinlock_debug.c:116 __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline] _raw_spin_lock+0x50/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] __d_instantiate+0x128/0x674 fs/dcache.c:1910 d_instantiate+0x70/0x9c fs/dcache.c:1947 __debugfs_create_file+0x218/0x430 fs/debugfs/inode.c:464 debugfs_create_file_full+0x58/0x70 fs/debugfs/inode.c:474 __vhci_create_device drivers/bluetooth/hci_vhci.c:440 [inline] vhci_create_device+0x3d4/0x6d4 drivers/bluetooth/hci_vhci.c:471 vhci_get_user drivers/bluetooth/hci_vhci.c:528 [inline] vhci_write+0x314/0x3d4 drivers/bluetooth/hci_vhci.c:608 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x62c/0x97c fs/read_write.c:686 ksys_write+0x120/0x210 fs/read_write.c:738 __do_sys_write fs/read_write.c:749 [inline] __se_sys_write fs/read_write.c:746 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:746 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596