watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.3.1545:14422] Modules linked in: irq event stamp: 13867775 hardirqs last enabled at (13867774): [] irqentry_exit+0x59c/0x620 kernel/entry/common.c:219 hardirqs last disabled at (13867775): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (5514216): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (5514216): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (5514216): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (5514219): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (5514219): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (5514219): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 14422 Comm: syz.3.1545 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:81 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:103 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:238 [inline] RIP: 0010:unwind_next_frame+0x51a/0x23c0 arch/x86/kernel/unwind_orc.c:510 Code: 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 8d 47 fc 48 0f 47 d8 RSP: 0018:ffffc90000a07c78 EFLAGS: 00000246 RAX: fffffffff1a56f05 RBX: ffffffff900a4254 RCX: dffffc0000000000 RDX: ffffffff900a4244 RSI: ffffffff90870ec0 RDI: ffffffff8c073920 RBP: ffffffff900a4244 R08: 000000000000000c R09: ffffffff8e55a360 R10: ffffc90000a07d98 R11: ffffffff81afb170 R12: ffffffff81afb108 R13: ffffffff900a4244 R14: ffffc90000a07d48 R15: ffffffff900a424c FS: 00007f8f56da86c0(0000) GS:ffff8881257f5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8c78bf5ff8 CR3: 0000000033028000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 kvfree_call_rcu+0x106/0x440 mm/slab_common.c:1994 cfg80211_update_known_bss+0x830/0x1590 net/wireless/scan.c:1944 __cfg80211_bss_update+0x147/0x2110 net/wireless/scan.c:1989 cfg80211_inform_single_bss_data+0xbc4/0x1ab0 net/wireless/scan.c:2369 cfg80211_inform_bss_data+0x23f/0x3c20 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230 ieee80211_scan_rx+0x552/0xa40 net/mac80211/scan.c:364 __ieee80211_rx_handle_packet net/mac80211/rx.c:5287 [inline] ieee80211_rx_list+0x2508/0x3050 net/mac80211/rx.c:5544 ieee80211_rx_napi+0x1b1/0x3e0 net/mac80211/rx.c:5567 ieee80211_rx include/net/mac80211.h:5216 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22a/0x7c0 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:finish_task_switch+0x241/0x920 kernel/sched/core.c:5118 Code: 0f 84 bd 01 00 00 48 85 db 0f 85 e4 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 f9 c5 05 0a e8 64 8c 38 00 fb 4c 8b 65 c0 <49> 8d bc 24 48 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc9000bb8f6d8 EFLAGS: 00000206 RAX: 0000000000000509 RBX: 0000000000000000 RCX: 0000000080000001 RDX: 0000000000000006 RSI: ffffffff8dcc9112 RDI: ffffffff8c073980 RBP: ffffc9000bb8f730 R08: ffffffff8fef1a77 R09: 1ffffffff1fde34e R10: dffffc0000000000 R11: fffffbfff1fde34f R12: ffff88807c629e80 R13: dffffc0000000000 R14: ffff888028ac5b80 R15: ffff8880b873b498 context_switch kernel/sched/core.c:5263 [inline] __schedule+0x14f2/0x5050 kernel/sched/core.c:6867 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7194 irqentry_exit+0x597/0x620 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:preempt_schedule+0x4/0x30 kernel/sched/core.c:7073 Code: 9e fa f5 e9 0e b6 01 00 cc 66 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 f3 0f 1e fa <65> 8b 05 b5 92 5a 07 a9 ff ff ff 7f 75 09 9c 58 a9 00 02 00 00 75 RSP: 0018:ffffc9000bb8fa60 EFLAGS: 00000283 RAX: ffffffff81b88b04 RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc90016b04000 RSI: 000000000000228b RDI: 000000000000228c RBP: ffffc9000bb8fab0 R08: ffffffff8fef1a77 R09: 1ffffffff1fde34e R10: dffffc0000000000 R11: fffffbfff1fde34f R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff92001771f5c R15: 1ffff92001771f5c preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 smp_call_function_single+0x469/0x580 kernel/smp.c:689 task_function_call kernel/events/core.c:122 [inline] perf_install_in_context+0x5c0/0x930 kernel/events/core.c:3105 __do_sys_perf_event_open kernel/events/core.c:13829 [inline] __se_sys_perf_event_open+0x192f/0x1d60 kernel/events/core.c:13471 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8f55f9aeb9 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:00007f8f56da8028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f8f56216270 RCX: 00007f8f55f9aeb9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480 RBP: 00007f8f56008c1f R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8f56216308 R14: 00007f8f56216270 R15: 00007ffde3deae98 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 52 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Workqueue: hci12 hci_rx_work RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x70 kernel/kcov.c:213 Code: 00 00 00 48 8b 3d c4 2e 33 0c 48 89 de 5b e9 73 c2 5c 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 0d a8 38 2e 11 65 8b 15 c9 38 2e 11 81 e2 00 RSP: 0018:ffffc90000bd6de8 EFLAGS: 00000297 RAX: ffffffff8b92d20c RBX: dffffc0000000000 RCX: 0000000000000002 RDX: ffff888022689e80 RSI: 0000000000000010 RDI: 0000000000000029 RBP: ffffffff8bad8485 R08: ffff888022689e80 R09: 0000000000000008 R10: 0000000000000007 R11: 0000000000000002 R12: 0000000000000800 R13: ffffc90000bd70c1 R14: 0000000000000801 R15: 0000000000000010 FS: 0000000000000000(0000) GS:ffff8881256f5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4254000020 CR3: 000000007c636000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: vsnprintf+0x19d/0xee0 lib/vsprintf.c:2908 sprintf+0xe7/0x140 lib/vsprintf.c:3110 print_time kernel/printk/printk.c:1357 [inline] info_print_prefix+0x16b/0x360 kernel/printk/printk.c:1383 record_print_text+0x176/0x450 kernel/printk/printk.c:1432 printk_get_next_message+0x29c/0x880 kernel/printk/printk.c:3018 console_emit_next_record kernel/printk/printk.c:3083 [inline] console_flush_one_record kernel/printk/printk.c:3215 [inline] console_flush_all+0x501/0xb20 kernel/printk/printk.c:3289 __console_flush_and_unlock kernel/printk/printk.c:3319 [inline] console_unlock+0xd1/0x1c0 kernel/printk/printk.c:3359 vprintk_emit+0x485/0x560 kernel/printk/printk.c:2426 _printk+0xdd/0x130 kernel/printk/printk.c:2451 bt_warn+0x121/0x180 net/bluetooth/lib.c:276 hci_cc_func net/bluetooth/hci_event.c:4229 [inline] hci_cmd_complete_evt+0x486/0xa80 net/bluetooth/hci_event.c:4253 hci_event_func net/bluetooth/hci_event.c:7716 [inline] hci_event_packet+0x7af/0x12c0 net/bluetooth/hci_event.c:7773 hci_rx_work+0x3ee/0x1030 net/bluetooth/hci_core.c:4076 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421 kthread+0x726/0x8b0 kernel/kthread.c:463 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=8fa4/1/0x4000000000000000 softirq=57104/57105 fqs=3587 rcu: hardirqs softirqs csw/system rcu: number: 2525203 0 0 rcu: cputime: 39765 12714 31 ==> 52480(ms) rcu: (t=10500 jiffies g=47889 q=6399 ncpus=2) CPU: 1 UID: 0 PID: 14422 Comm: syz.3.1545 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:stack_trace_consume_entry+0x129/0x280 kernel/stacktrace.c:95 Code: 89 c5 e8 0a 12 7d 00 49 89 e8 4c 89 e2 48 89 de 49 89 37 41 8b 18 41 0f b6 44 15 00 84 c0 0f 85 34 01 00 00 41 3b 1e 0f 92 c0 <48> 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 RSP: 0018:ffffc90000a07e98 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffffc90000a07fac RCX: 0000000000000100 RDX: dffffc0000000000 RSI: ffffffff81afb109 RDI: ffffc90000a07fa0 RBP: 1ffff92000140ff6 R08: ffffc90000a07fb0 R09: 0000000000000000 R10: ffffc90000a07f38 R11: ffffffff81afb170 R12: 0000000000000000 R13: 1ffff92000140ff5 R14: ffffc90000a07fa8 R15: 1ffff92000140ff5 FS: 00007f8f56da86c0(0000) GS:ffff8881257f5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8c78bf5ff8 CR3: 0000000033028000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x10f/0x150 arch/x86/kernel/stacktrace.c:27 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 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5657 [inline] __kmalloc_noprof+0x40c/0x7e0 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] cfg80211_inform_single_bss_data+0x934/0x1ab0 net/wireless/scan.c:2345 cfg80211_inform_bss_data+0x23f/0x3c20 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230 ieee80211_scan_rx+0x552/0xa40 net/mac80211/scan.c:364 __ieee80211_rx_handle_packet net/mac80211/rx.c:5287 [inline] ieee80211_rx_list+0x2508/0x3050 net/mac80211/rx.c:5544 ieee80211_rx_napi+0x1b1/0x3e0 net/mac80211/rx.c:5567 ieee80211_rx include/net/mac80211.h:5216 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22a/0x7c0 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:finish_task_switch+0x241/0x920 kernel/sched/core.c:5118 Code: 0f 84 bd 01 00 00 48 85 db 0f 85 e4 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 f9 c5 05 0a e8 64 8c 38 00 fb 4c 8b 65 c0 <49> 8d bc 24 48 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc9000bb8f6d8 EFLAGS: 00000206 RAX: 0000000000000509 RBX: 0000000000000000 RCX: 0000000080000001 RDX: 0000000000000006 RSI: ffffffff8dcc9112 RDI: ffffffff8c073980 RBP: ffffc9000bb8f730 R08: ffffffff8fef1a77 R09: 1ffffffff1fde34e R10: dffffc0000000000 R11: fffffbfff1fde34f R12: ffff88807c629e80 R13: dffffc0000000000 R14: ffff888028ac5b80 R15: ffff8880b873b498 context_switch kernel/sched/core.c:5263 [inline] __schedule+0x14f2/0x5050 kernel/sched/core.c:6867 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7194 irqentry_exit+0x597/0x620 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:preempt_schedule+0x4/0x30 kernel/sched/core.c:7073 Code: 9e fa f5 e9 0e b6 01 00 cc 66 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 f3 0f 1e fa <65> 8b 05 b5 92 5a 07 a9 ff ff ff 7f 75 09 9c 58 a9 00 02 00 00 75 RSP: 0018:ffffc9000bb8fa60 EFLAGS: 00000283 RAX: ffffffff81b88b04 RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc90016b04000 RSI: 000000000000228b RDI: 000000000000228c RBP: ffffc9000bb8fab0 R08: ffffffff8fef1a77 R09: 1ffffffff1fde34e R10: dffffc0000000000 R11: fffffbfff1fde34f R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff92001771f5c R15: 1ffff92001771f5c preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 smp_call_function_single+0x469/0x580 kernel/smp.c:689 task_function_call kernel/events/core.c:122 [inline] perf_install_in_context+0x5c0/0x930 kernel/events/core.c:3105 __do_sys_perf_event_open kernel/events/core.c:13829 [inline] __se_sys_perf_event_open+0x192f/0x1d60 kernel/events/core.c:13471 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8f55f9aeb9 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:00007f8f56da8028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f8f56216270 RCX: 00007f8f55f9aeb9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480 RBP: 00007f8f56008c1f R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8f56216308 R14: 00007f8f56216270 R15: 00007ffde3deae98