watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.0.2200:14506] Modules linked in: irq event stamp: 11758979 hardirqs last enabled at (11758978): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:200 hardirqs last disabled at (11758979): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (4256422): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (4256422): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (4256422): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (4256425): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (4256425): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (4256425): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 14506 Comm: syz.0.2200 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:__read_once_word_nocheck+0x3/0x10 include/asm-generic/rwonce.h:67 Code: b0 00 48 ba 00 00 00 00 00 fc ff df e9 88 fc ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 07 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000006b90 EFLAGS: 00000202 RAX: ffffffff81c95016 RBX: ffffc900040c8000 RCX: 1ffff92000000d01 RDX: ffffc90000006c78 RSI: 0000000000000003 RDI: ffffc900040ceba8 RBP: ffffc900040d0000 R08: 0000000000000018 R09: ffffffff8172d195 R10: dffffc0000000000 R11: ffffffff81ac4d00 R12: ffffc900040ceb28 R13: 1ffff92000000d8e R14: ffffc90000006c68 R15: 1ffff92000000d8f FS: 00007f17e87016c0(0000) GS:ffff888125c13000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000088000 CR3: 00000000272a4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: deref_stack_regs arch/x86/kernel/unwind_orc.c:421 [inline] unwind_next_frame+0xe39/0x2390 arch/x86/kernel/unwind_orc.c:596 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:47 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548 kvfree_call_rcu+0xbb/0x410 mm/slab_common.c:1962 cfg80211_update_known_bss+0x84b/0x13c0 net/wireless/scan.c:1937 __cfg80211_bss_update+0x147/0x2120 net/wireless/scan.c:1984 cfg80211_inform_single_bss_data+0xba9/0x1ac0 net/wireless/scan.c:2376 cfg80211_inform_bss_data+0x1fb/0x3b30 net/wireless/scan.c:3235 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3326 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5186 [inline] ieee80211_rx_list+0x201c/0x2a90 net/mac80211/rx.c:5423 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5446 ieee80211_rx include/net/mac80211.h:5210 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453 tasklet_action_common+0x36c/0x580 kernel/softirq.c:829 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:perf_trace_buf_alloc+0x1e6/0x2a0 kernel/trace/trace_event_perf.c:421 Code: 03 37 48 63 c3 4a 8d 3c 30 48 83 c7 f8 ba 08 00 00 00 31 f6 e8 bb f1 59 00 4c 89 f0 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d 05 ec b3 09 cc e8 df 70 f6 ff c6 05 49 3d c4 0d 01 90 48 c7 c7 RSP: 0018:ffffc900040cebd8 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffffffff8dbe2d10 RCX: 0000000000080000 RDX: ffffc9000cb2b000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: ffffc900040cecc8 R08: ffffc900040cedcf R09: 0000000000000000 R10: ffffc900040cedc0 R11: ffffffffa020168c R12: 1ffff92000819d84 R13: 000000000000000d R14: 000000000000002c R15: dffffc0000000000 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:871 [inline] trace_call_bpf+0x5a9/0x850 kernel/trace/bpf_trace.c:148 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10918 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 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:871 [inline] page_table_check_clear+0x4f3/0x700 mm/page_table_check.c:89 page_table_check_pte_clear include/linux/page_table_check.h:51 [inline] ptep_get_and_clear arch/x86/include/asm/pgtable.h:1254 [inline] ptep_clear_flush+0x165/0x170 mm/pgtable-generic.c:99 wp_page_copy mm/memory.c:3618 [inline] do_wp_page+0x1bc2/0x5800 mm/memory.c:4013 handle_pte_fault mm/memory.c:6068 [inline] __handle_mm_fault+0x1033/0x5440 mm/memory.c:6195 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6364 do_user_addr_fault+0x764/0x1390 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:74 Code: 0a 04 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 a4 c3 cc cc cc cc 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 RSP: 0018:ffffc900040cf678 EFLAGS: 00050206 RAX: ffffffff84c60601 RBX: ffff88805ac400e8 RCX: 0000000000009450 RDX: 0000000000000000 RSI: ffff88805ac46e68 RDI: 0000200000088000 RBP: ffffc900040cf800 R08: ffff88805ac502b7 R09: 1ffff1100b58a056 R10: dffffc0000000000 R11: ffffed100b58a057 R12: 1ffff92000819fbf R13: 0000200000081280 R14: ffffc900040cfe08 R15: 00000000000101d0 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline] copy_to_user_iter lib/iov_iter.c:25 [inline] iterate_ubuf include/linux/iov_iter.h:30 [inline] iterate_and_advance2 include/linux/iov_iter.h:302 [inline] iterate_and_advance include/linux/iov_iter.h:330 [inline] _copy_to_iter+0x24f/0x1790 lib/iov_iter.c:185 copy_to_iter include/linux/uio.h:220 [inline] simple_copy_to_iter net/core/datagram.c:521 [inline] __skb_datagram_iter+0xf8/0x990 net/core/datagram.c:402 skb_copy_datagram_iter+0xc5/0x230 net/core/datagram.c:535 skb_copy_datagram_msg include/linux/skbuff.h:4167 [inline] tipc_recvstream+0x72d/0xe70 net/tipc/socket.c:2067 sock_recvmsg_nosec net/socket.c:1065 [inline] sock_recvmsg+0x229/0x270 net/socket.c:1087 ____sys_recvmsg+0x1c9/0x460 net/socket.c:2834 ___sys_recvmsg+0x1b5/0x510 net/socket.c:2876 __sys_recvmsg net/socket.c:2909 [inline] __do_sys_recvmsg net/socket.c:2915 [inline] __se_sys_recvmsg net/socket.c:2912 [inline] __x64_sys_recvmsg+0x198/0x260 net/socket.c:2912 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f17e778eba9 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:00007f17e8701038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007f17e79d5fa0 RCX: 00007f17e778eba9 RDX: 0000000000001f00 RSI: 0000200000000500 RDI: 000000000000000b RBP: 00007f17e7811e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f17e79d6038 R14: 00007f17e79d5fa0 R15: 00007ffcf8aee3a8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 14415 Comm: kworker/1:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Workqueue: wg-kex-wg0 wg_packet_handshake_receive_worker RIP: 0010:migrate_disable+0x8/0x190 kernel/sched/core.c:2385 Code: 03 38 c1 7c c6 48 89 ef e8 a5 d4 92 00 eb bc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 <41> 55 41 54 53 49 bc 00 00 00 00 00 fc ff df 65 48 8b 1c 25 08 d0 RSP: 0018:ffffc90000a08b68 EFLAGS: 00000082 RAX: ffffffff81cb19ac RBX: 0000000000000001 RCX: ffff888025b58000 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000a08c78 R08: ffffc90000a08c0f R09: 0000000000000000 R10: ffffc90000a08c00 R11: fffff52000141182 R12: 0000000000000001 R13: ffffc90000a08c00 R14: ffff88807e090b80 R15: ffffffff8e19acc8 FS: 0000000000000000(0000) GS:ffff888125d13000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbe56dd6038 CR3: 0000000056f1e000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: bpf_prog_run_array include/linux/bpf.h:2294 [inline] trace_call_bpf+0x229/0x850 kernel/trace/bpf_trace.c:146 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10918 do_perf_trace_preemptirq_template include/trace/events/preemptirq.h:14 [inline] perf_trace_preemptirq_template+0x280/0x340 include/trace/events/preemptirq.h:14 __do_trace_irq_disable include/trace/events/preemptirq.h:36 [inline] trace_irq_disable+0xee/0x110 include/trace/events/preemptirq.h:36 tasklet_action_common+0x9e/0x580 kernel/softirq.c:813 handle_softirqs+0x283/0x870 kernel/softirq.c:579 do_softirq+0xec/0x180 kernel/softirq.c:480 __local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:407 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:479 blake2s_compress+0x5f/0xd0 lib/crypto/x86/blake2s-glue.c:46 blake2s_update+0x14b/0x450 lib/crypto/blake2s.c:33 hmac+0x1b6/0x330 drivers/net/wireguard/noise.c:324 kdf+0xde/0x270 drivers/net/wireguard/noise.c:360 mix_dh drivers/net/wireguard/noise.c:413 [inline] wg_noise_handshake_consume_initiation+0x242/0x900 drivers/net/wireguard/noise.c:608 wg_receive_handshake_packet drivers/net/wireguard/receive.c:144 [inline] wg_packet_handshake_receive_worker+0x5f2/0xfb0 drivers/net/wireguard/receive.c:213 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x436/0x7d0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245