watchdog: BUG: soft lockup - CPU#1 stuck for 116s! [syz.1.506:8294] Modules linked in: irq event stamp: 13034261 hardirqs last enabled at (13034260): [] irqentry_exit+0x5dd/0x660 kernel/entry/common.c:219 hardirqs last disabled at (13034261): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (13029206): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (13029206): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (13029206): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (13029209): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (13029209): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (13029209): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 8294 Comm: syz.1.506 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:unwind_next_frame+0x374/0x2390 arch/x86/kernel/unwind_orc.c:505 Code: ea 48 01 d2 48 01 f2 48 bd 00 00 00 00 00 fc ff df 0f 84 37 01 00 00 4c 8d 62 04 4c 8d 6a 05 4c 89 e0 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 6d 19 00 00 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f RSP: 0018:ffffc90000a08398 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffffffff8ff00ab8 RCX: ffffffff8ff00abc RDX: ffffffff9096e726 RSI: ffffffff9096e708 RDI: ffffffff8bbfc600 RBP: dffffc0000000000 R08: 0000000000000006 R09: ffffffff8df41cc0 R10: ffffc90000a07fc8 R11: ffffffff81ad4ad0 R12: ffffffff9096e72a R13: ffffffff9096e72b R14: ffffc90000a08468 R15: ffffffff8ff00ab8 FS: 00007fa53fe216c0(0000) GS:ffff8881261b0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5c6d3b6ad8 CR3: 00000000424b0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 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 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4948 [inline] slab_alloc_node mm/slub.c:5258 [inline] kmem_cache_alloc_noprof+0x367/0x6f0 mm/slub.c:5265 skb_clone+0x212/0x3a0 net/core/skbuff.c:2087 hsr_forward_do net/hsr/hsr_forward.c:-1 [inline] hsr_forward_skb+0x1013/0x2860 net/hsr/hsr_forward.c:741 send_hsr_supervision_frame+0x731/0xcb0 net/hsr/hsr_device.c:364 hsr_announce+0x1d5/0x360 net/hsr/hsr_device.c:421 call_timer_fn+0x16e/0x590 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404 handle_softirqs+0x27d/0x850 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: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:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:124 [inline] RIP: 0010:lock_is_held_type+0x40/0x190 kernel/locking/lockdep.c:5933 Code: c6 bb 2d 07 48 89 44 24 08 bb ff ff ff ff 83 3d 25 47 37 04 00 0f 84 fe 00 00 00 65 8b 05 f8 ff 2d 07 85 c0 0f 85 ef 00 00 00 <65> 4c 8b 2c 25 08 00 77 92 41 83 bd 2c 0b 00 00 00 0f 85 d8 00 00 RSP: 0018:ffffc90003867198 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffff88804794db80 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8df41d80 RBP: ffffc900038673f0 R08: ffffffff8f805b77 R09: 1ffffffff1f00b6e R10: dffffc0000000000 R11: fffffbfff1f00b6f R12: ffff8881261b0000 R13: 0000000000000001 R14: ffff88804794db80 R15: 1ffff11017127658 lock_is_held include/linux/lockdep.h:249 [inline] schedule_debug kernel/sched/core.c:5835 [inline] __schedule+0x278/0x5000 kernel/sched/core.c:6740 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:7047 preempt_schedule+0xae/0xc0 kernel/sched/core.c:7071 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xfd/0x110 kernel/locking/spinlock.c:194 rcu_preempt_deferred_qs_irqrestore+0x89c/0xce0 kernel/rcu/tree_plugin.h:-1 rcu_read_unlock_special+0x3d8/0x520 kernel/rcu/tree_plugin.h:769 __rcu_read_unlock+0x84/0xe0 kernel/rcu/tree_plugin.h:438 rcu_read_unlock include/linux/rcupdate.h:899 [inline] class_rcu_destructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0x19ae/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 save_stack+0xf5/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:311 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2901 __slab_free+0x21b/0x2a0 mm/slub.c:5999 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:352 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4948 [inline] slab_alloc_node mm/slub.c:5258 [inline] kmem_cache_alloc_lru_noprof+0x35d/0x6d0 mm/slub.c:5277 sock_alloc_inode+0x28/0xc0 net/socket.c:322 alloc_inode+0x6a/0x1b0 fs/inode.c:346 new_inode_pseudo include/linux/fs.h:2965 [inline] sock_alloc net/socket.c:628 [inline] __sock_create+0x12d/0x9d0 net/socket.c:1560 sock_create net/socket.c:1654 [inline] __sys_socket_create net/socket.c:1691 [inline] __sys_socket+0xd7/0x320 net/socket.c:1738 __do_sys_socket net/socket.c:1752 [inline] __se_sys_socket net/socket.c:1750 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1750 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa53ef8f749 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:00007fa53fe21038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007fa53f1e5fa0 RCX: 00007fa53ef8f749 RDX: 0000000000000004 RSI: 0000000000000002 RDI: 0000000000000010 RBP: 00007fa53f013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa53f1e6038 R14: 00007fa53f1e5fa0 R15: 00007fff38ad47f8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 995 Comm: kworker/u8:6 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker RIP: 0010:mark_usage kernel/locking/lockdep.c:4674 [inline] RIP: 0010:__lock_acquire+0x6b1/0x2cf0 kernel/locking/lockdep.c:5191 Code: 47 00 00 85 c0 0f 84 99 0d 00 00 41 8b 45 20 a9 00 00 18 00 0f 84 bc 00 00 00 4c 8b 74 24 08 4c 89 f7 4c 89 ee ba 08 00 00 00 9a 47 00 00 31 ed 85 c0 0f 84 6d 0d 00 00 83 3d d9 0f e4 17 00 RSP: 0018:ffffc90000006a50 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffff888025dfaa98 RCX: 0000000000000005 RDX: 0000000000000008 RSI: ffff888025dfaa78 RDI: ffff888025df9e80 RBP: ffff888025dfaa78 R08: ffffffff8173ef25 R09: ffffffff8df41cc0 R10: ffffc90000006d58 R11: ffffffff81ad4ad0 R12: 0000000000000003 R13: ffff888025dfaa78 R14: ffff888025df9e80 R15: 0000000000000005 FS: 0000000000000000(0000) GS:ffff8881260b0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0ce12af589 CR3: 00000000427a0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: lock_acquire+0x117/0x340 kernel/locking/lockdep.c:5868 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 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:2540 [inline] slab_free mm/slub.c:6663 [inline] kfree+0x1c0/0x660 mm/slub.c:6871 ieee80211_inform_bss+0xc4e/0x1130 net/mac80211/scan.c:164 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd14/0x1ad0 net/wireless/scan.c:2373 cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:230 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:359 __ieee80211_rx_handle_packet net/mac80211/rx.c:5282 [inline] ieee80211_rx_list+0x2485/0x2f90 net/mac80211/rx.c:5539 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5562 ieee80211_rx include/net/mac80211.h:5216 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x358/0x550 kernel/softirq.c:925 handle_softirqs+0x27d/0x850 kernel/softirq.c:622 do_softirq+0xec/0x180 kernel/softirq.c:523 __local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:450 local_bh_enable include/linux/bottom_half.h:33 [inline] fpregs_unlock arch/x86/include/asm/fpu/api.h:77 [inline] kernel_fpu_end+0xd2/0x120 arch/x86/kernel/fpu/core.c:480 blake2s_compress+0xe9/0x1b80 lib/crypto/x86/blake2s.h:42 blake2s_update+0x14b/0x450 lib/crypto/blake2s.c:125 blake2s include/crypto/blake2s.h:156 [inline] compute_mac1+0x145/0x1a0 drivers/net/wireguard/cookie.c:80 wg_cookie_add_mac_to_packet+0x57/0x1a0 drivers/net/wireguard/cookie.c:163 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:35 [inline] wg_packet_handshake_send_worker+0x17c/0x320 drivers/net/wireguard/send.c:51 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246