BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 143s! Showing busy workqueues and worker pools: workqueue events: flags=0x100 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=15 refcnt=16 pending: psi_avgs_work, 5*nsim_dev_hwstats_traffic_work, 4*psi_avgs_work, ovs_dp_masks_rebalance, vmstat_shepherd, switchdev_deferred_process_work, rht_deferred_worker, delayed_vfree_work pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=12 refcnt=13 pending: 5*nsim_dev_hwstats_traffic_work, psi_avgs_work, 6*ovs_dp_masks_rebalance workqueue events_long: flags=0x100 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=5 refcnt=6 pending: 4*defense_work_handler, br_multicast_gc_work pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=4 refcnt=5 pending: 4*defense_work_handler workqueue events_unbound: flags=0x2 pwq 8: cpus=0-1 flags=0x4 nice=0 active=9 refcnt=10 pending: 6*cfg80211_wiphy_work, 3*macvlan_process_broadcast pwq 8: cpus=0-1 flags=0x4 nice=0 active=18 refcnt=19 in-flight: 9964:cfg80211_wiphy_work for 22s ,1167:linkwatch_event for 22s pending: 10*nsim_dev_trap_report_work, toggle_allocation_gate, 2*cfg80211_wiphy_work, flush_memcg_stats_dwork, 2*macvlan_process_broadcast workqueue events_freezable: flags=0x104 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: update_balloon_stats_func workqueue events_power_efficient: flags=0x180 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=15 refcnt=16 in-flight: 5973:neigh_periodic_work for 144s pending: 2*check_lifetime, gc_worker, wg_ratelimiter_gc_entries, reg_check_chans_work, 2*neigh_managed_work, check_lifetime, neigh_periodic_work, do_cache_clean, 4*check_lifetime pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: 2*nf_flow_offload_work_gc, hash_mac4_gc workqueue rcu_gp: flags=0x108 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: srcu_invoke_callbacks workqueue netns: flags=0x6000a pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=4 in-flight: 59:cleanup_net for 197s workqueue mm_percpu_wq: flags=0x108 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: vmstat_update workqueue writeback: flags=0x4a pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=2 pending: wb_workfn workqueue kblockd: flags=0x18 pwq 7: cpus=1 node=0 flags=0x0 nice=-20 active=2 refcnt=3 pending: blk_mq_timeout_work, blk_mq_requeue_work workqueue krxrpcd: flags=0x2001a workqueue bat_events: flags=0x6000a pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=44 in-flight: 35:batadv_bla_periodic_work for 0s inactive: batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_tt_purge, batadv_dat_purge, 6*batadv_mcast_mla_update, 10*batadv_iv_send_outstanding_bat_ogm_packet, batadv_purge_orig, batadv_iv_send_outstanding_bat_ogm_packet, 3*batadv_purge_orig, 7*batadv_iv_send_outstanding_bat_ogm_packet, 2*batadv_purge_orig, 3*batadv_tt_purge, batadv_bla_periodic_work, batadv_tt_purge workqueue wg-crypt-wg0: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-crypt-wg1: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-crypt-wg2: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-crypt-wg1: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-crypt-wg2: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_decrypt_worker, wg_packet_encrypt_worker, wg_packet_tx_worker workqueue hci5: flags=0x20012 pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=4 in-flight: 5822:hci_cmd_sync_work for 144s workqueue hci8: flags=0x20012 pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=4 in-flight: 5836:hci_cmd_sync_work for 144s workqueue wg-kex-wg0: flags=0x124 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg0: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_decrypt_worker, wg_packet_tx_worker workqueue wg-kex-wg1: flags=0x124 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg1: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_decrypt_worker, wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-kex-wg2: flags=0x124 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg2: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_decrypt_worker, wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-kex-wg0: flags=0x124 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg0: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_tx_worker, wg_packet_decrypt_worker workqueue wg-kex-wg2: flags=0x124 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg2: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_decrypt_worker, wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-kex-wg0: flags=0x124 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg0: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_tx_worker, wg_packet_decrypt_worker workqueue wg-kex-wg2: flags=0x124 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg2: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_decrypt_worker, wg_packet_encrypt_worker, wg_packet_tx_worker workqueue hci0: flags=0x20012 pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=4 in-flight: 5827:hci_cmd_sync_work for 89s workqueue wg-crypt-wg0: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_tx_worker, wg_packet_encrypt_worker workqueue wg-crypt-wg1: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-crypt-wg2: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_encrypt_worker, wg_packet_tx_worker workqueue hci1: flags=0x20012 pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=4 in-flight: 13061:hci_cmd_sync_work for 89s workqueue wg-kex-wg0: flags=0x124 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg0: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_tx_worker, wg_packet_decrypt_worker workqueue wg-kex-wg1: flags=0x124 NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 13047 Comm: syz.0.1614 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:format_decode+0x4df/0xe10 lib/vsprintf.c:2779 Code: 00 44 0f b6 6d 01 45 0f b6 e6 44 89 e7 44 89 ee e8 56 7e 19 f6 45 38 ec 41 0f b6 c7 0f b6 db 0f 44 d8 48 0f 44 6c 24 10 eb 24 bc 7d 19 f6 41 bf 00 04 00 00 49 89 ec 4c 8b 74 24 18 48 ba 00 RSP: 0018:ffffc900000070f0 EFLAGS: 00000246 RAX: ffffffff8bac367d RBX: 0000000000000000 RCX: 0000000000000100 RDX: ffff88807c03db80 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffffff8bcd8a61 R08: ffff88807c03db80 R09: 0000000000000002 R10: 0000000000000025 R11: 0000000000000100 R12: ffffc90000007199 R13: ffffffff8d09174c R14: 0000000000000063 R15: 000000000000018c FS: 00007f9ea29d06c0(0000) GS:ffff888125453000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c28b30a CR3: 000000007c17c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: vsnprintf+0x102/0xee0 lib/vsprintf.c:2890 snprintf+0xe8/0x140 lib/vsprintf.c:3042 print_caller kernel/printk/printk.c:1368 [inline] info_print_prefix+0x1fd/0x360 kernel/printk/printk.c:1387 record_print_text+0x176/0x450 kernel/printk/printk.c:1434 printk_get_next_message+0x29c/0x880 kernel/printk/printk.c:3072 console_emit_next_record kernel/printk/printk.c:3137 [inline] console_flush_one_record kernel/printk/printk.c:3269 [inline] console_flush_all+0x501/0xb20 kernel/printk/printk.c:3343 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline] console_unlock+0xd1/0x1c0 kernel/printk/printk.c:3413 vprintk_emit+0x485/0x560 kernel/printk/printk.c:2479 _printk+0xdd/0x130 kernel/printk/printk.c:2504 show_one_workqueue+0x102/0x280 kernel/workqueue.c:6426 show_all_workqueues+0x148/0x6d0 kernel/workqueue.c:6516 wq_watchdog_timer_fn+0x59d/0x870 kernel/workqueue.c:7739 call_timer_fn+0x192/0x640 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0x103/0x170 kernel/time/timer.c:2405 handle_softirqs+0x22a/0x870 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:__apply_to_page_range+0x203/0x1420 mm/memory.c:3383 Code: ff 49 89 de 41 bd 01 00 00 00 89 d9 49 d3 e5 4d 01 e5 44 89 f1 49 d3 ed 49 d3 e5 49 8d 5d ff 48 89 df 4c 8b b4 24 b8 00 00 00 <4c> 89 f6 e8 15 19 b0 ff 4c 39 f3 4c 0f 43 6c 24 68 4c 89 6c 24 50 RSP: 0018:ffffc9000214f0a0 EFLAGS: 00000286 RAX: ffffffff82159dea RBX: fffff57fffffffff RCX: 0000000000000027 RDX: ffffc9000fe54000 RSI: 0000000000003685 RDI: fffff57fffffffff RBP: ffffc9000214f218 R08: ffffc9000214f228 R09: 0000000000000001 R10: 0000000000000040 R11: 0000000000000002 R12: fffff52000cb4000 R13: fffff58000000000 R14: fffff52000cb4fff R15: dffffc0000000000 __kasan_populate_vmalloc_do mm/kasan/shadow.c:381 [inline] __kasan_populate_vmalloc+0x10b/0x1d0 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0xd73/0x14b0 mm/vmalloc.c:2129 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3232 __vmalloc_node_range_noprof+0x372/0x1730 mm/vmalloc.c:4024 __vmalloc_node_noprof mm/vmalloc.c:4124 [inline] vzalloc_noprof+0xb2/0xe0 mm/vmalloc.c:4202 bpf_check+0x196/0x1cd90 kernel/bpf/verifier.c:26554 bpf_prog_load+0x1484/0x1ae0 kernel/bpf/syscall.c:3082 __sys_bpf+0x618/0x950 kernel/bpf/syscall.c:6252 __do_sys_bpf kernel/bpf/syscall.c:6365 [inline] __se_sys_bpf kernel/bpf/syscall.c:6363 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6363 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9ea1b9c819 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:00007f9ea29d0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f9ea1e15fa0 RCX: 00007f9ea1b9c819 RDX: 0000000000000094 RSI: 0000200000000640 RDI: 0000000000000005 RBP: 00007f9ea1c32c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9ea1e16038 R14: 00007f9ea1e15fa0 R15: 00007fff1030b058 ---------------- Code disassembly (best guess): 0: 00 44 0f b6 add %al,-0x4a(%rdi,%rcx,1) 4: 6d insl (%dx),%es:(%rdi) 5: 01 45 0f add %eax,0xf(%rbp) 8: b6 e6 mov $0xe6,%dh a: 44 89 e7 mov %r12d,%edi d: 44 89 ee mov %r13d,%esi 10: e8 56 7e 19 f6 call 0xf6197e6b 15: 45 38 ec cmp %r13b,%r12b 18: 41 0f b6 c7 movzbl %r15b,%eax 1c: 0f b6 db movzbl %bl,%ebx 1f: 0f 44 d8 cmove %eax,%ebx 22: 48 0f 44 6c 24 10 cmove 0x10(%rsp),%rbp 28: eb 24 jmp 0x4e * 2a: e8 bc 7d 19 f6 call 0xf6197deb <-- trapping instruction 2f: 41 bf 00 04 00 00 mov $0x400,%r15d 35: 49 89 ec mov %rbp,%r12 38: 4c 8b 74 24 18 mov 0x18(%rsp),%r14 3d: 48 rex.W 3e: ba .byte 0xba