watchdog: BUG: soft lockup - CPU#0 stuck for 119s! [syz.4.84:6365] Modules linked in: irq event stamp: 10466731 hardirqs last enabled at (10466730): [] irqentry_exit+0x5dd/0x660 kernel/entry/common.c:219 hardirqs last disabled at (10466731): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (4979796): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (4979796): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (4979796): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (4979799): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (4979799): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (4979799): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 6365 Comm: syz.4.84 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x28/0x70 kernel/kcov.c:217 Code: 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 00 77 92 65 8b 15 b8 b5 b5 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 <83> b9 6c 16 00 00 00 74 2c 8b 91 48 16 00 00 83 fa 02 75 21 48 8b RSP: 0018:ffffc90000006a38 EFLAGS: 00000246 RAX: ffffffff8acd15f1 RBX: 0000000000000004 RCX: ffff888026f58000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffc90000006e30 R08: ffffc90000006da7 R09: 1ffff92000000db4 R10: dffffc0000000000 R11: fffff52000000db5 R12: ffff88804bca3ab2 R13: ffff88804bca3ac5 R14: dffffc0000000000 R15: 0000000000000006 FS: 00007f50e04106c0(0000) GS:ffff8881260b0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa2b71f3200 CR3: 0000000076162000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: _ieee802_11_parse_elems_full+0x7f1/0x4660 net/mac80211/parse.c:314 ieee802_11_parse_elems_full+0x125a/0x2ab0 net/mac80211/parse.c:1082 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2469 [inline] ieee80211_inform_bss+0x147/0x1130 net/mac80211/scan.c:79 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 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:kasan_check_range+0x1d8/0x2c0 mm/kasan/generic.c:200 Code: 5c 24 07 4d 85 e4 49 0f 49 dc 48 83 e3 f8 49 29 dc 74 12 41 80 3b 00 0f 85 b8 00 00 00 49 ff c3 49 ff cc 75 ee 5b 41 5c 41 5d <41> 5e 41 5f 5d e9 7e 06 25 09 cc 45 84 ff 75 63 41 f7 c7 00 ff 00 RSP: 0018:ffffc90003c275c0 EFLAGS: 00000256 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffffffff81caebaf RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffe8ffffcac024 RBP: 0000000000000000 R08: ffffe8ffffcac02b R09: 1ffffd1ffff95805 R10: dffffc0000000000 R11: fffff91ffff95806 R12: ffffffff8d98bdd0 R13: dffffc0000000000 R14: fffff91ffff95806 R15: 1ffffd1ffff95804 __asan_memset+0x22/0x50 mm/kasan/shadow.c:84 perf_trace_buf_alloc+0x1bf/0x280 kernel/trace/trace_event_perf.c:419 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+0x389/0x3b0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:897 [inline] class_rcu_destructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 __unwind_start+0x5b9/0x760 arch/x86/kernel/unwind_orc.c:758 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24 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 lsm_inode_alloc security/security.c:228 [inline] security_inode_alloc+0x39/0x330 security/security.c:1189 inode_init_always_gfp+0x9ed/0xdc0 fs/inode.c:306 inode_init_always include/linux/fs.h:2884 [inline] alloc_inode+0x82/0x1b0 fs/inode.c:353 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_socketpair+0x23a/0x560 net/socket.c:1805 __do_sys_socketpair net/socket.c:1854 [inline] __se_sys_socketpair net/socket.c:1851 [inline] __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1851 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: 0033:0x7f50df58f749 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:00007f50e0410038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007f50df7e6090 RCX: 00007f50df58f749 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001 RBP: 00007f50df613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000680 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f50df7e6128 R14: 00007f50df7e6090 R15: 00007fffa17111d8 Sending NMI from CPU 0 to CPUs 1: net_ratelimit: 929 callbacks suppressed bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6369 Comm: syz.2.85 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:check_preemption_disabled+0x17/0x120 lib/smp_processor_id.c:14 Code: 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 48 83 ec 10 65 48 8b 05 1e a2 2d 07 48 89 44 24 08 <65> 8b 05 26 a2 2d 07 65 8b 0d 1b a2 2d 07 f7 c1 ff ff ff 7f 74 23 RSP: 0018:ffffc90000a07cf0 EFLAGS: 00000086 RAX: 894a570df80ab100 RBX: ffff8880306e9e80 RCX: 894a570df80ab100 RDX: 0000000000000000 RSI: ffffffff8bbfc640 RDI: ffffffff8bbfc600 RBP: 0000000000000000 R08: ffffffff8f805b77 R09: 1ffffffff1f00b6e R10: dffffc0000000000 R11: fffffbfff1f00b6f R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880306e9e80 R15: dffffc0000000000 FS: 00007fbf4a10f6c0(0000) GS:ffff8881261b0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa2b72b04e8 CR3: 00000000756e4000 CR4: 00000000003526f0 Call Trace: irqtime_account_irq+0x18/0x1c0 kernel/sched/cputime.c:58 account_hardirq_exit include/linux/vtime.h:154 [inline] __irq_exit_rcu+0x8d/0x1f0 kernel/softirq.c:720 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+0x57/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2037 [inline] RIP: 0010:vprintk_emit+0x4d0/0x5f0 kernel/printk/printk.c:2425 Code: 0f 84 34 ff ff ff e8 ff 4c 20 00 fb eb 44 e8 f7 4c 20 00 e8 42 44 a8 09 4d 85 f6 74 94 e8 e8 4c 20 00 fb 48 c7 c7 80 5b f3 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 08 2c RSP: 0018:ffffc90000a07ec0 EFLAGS: 00000246 RAX: ffffffff81a0fd78 RBX: ffffffff81a0fbd1 RCX: ffff8880306e9e80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffffffff8df35b80 RBP: ffffc90000a07fd0 R08: ffffffff8f805b77 R09: 1ffffffff1f00b6e R10: dffffc0000000000 R11: fffffbfff1f00b6f R12: 0000000000000000 R13: 000000000000006e R14: 0000000000000200 R15: 1ffff92000140fdc _printk+0xcf/0x120 kernel/printk/printk.c:2451 br_fdb_update+0x62d/0x690 net/bridge/br_fdb.c:999 br_handle_frame_finish+0x587/0x1c90 net/bridge/br_input.c:144 br_nf_hook_thresh+0x3c6/0x4a0 net/bridge/br_netfilter_hooks.c:-1 br_nf_pre_routing_finish_ipv6+0x999/0xd60 net/bridge/br_netfilter_ipv6.c:-1 NF_HOOK include/linux/netfilter.h:318 [inline] br_nf_pre_routing_ipv6+0x37e/0x6b0 net/bridge/br_netfilter_ipv6.c:184 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_bridge_pre net/bridge/br_input.c:291 [inline] br_handle_frame+0x96e/0x14f0 net/bridge/br_input.c:442 __netif_receive_skb_core+0x95f/0x2f90 net/core/dev.c:6024 __netif_receive_skb_one_core net/core/dev.c:6135 [inline] __netif_receive_skb+0x72/0x380 net/core/dev.c:6250 process_backlog+0x622/0x1500 net/core/dev.c:6602 __napi_poll+0xae/0x320 net/core/dev.c:7666 napi_poll net/core/dev.c:7729 [inline] net_rx_action+0x672/0xe50 net/core/dev.c:7881 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:finish_task_switch+0x242/0x940 kernel/sched/core.c:5114 Code: 0f 84 c2 01 00 00 48 85 db 0f 85 e9 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 68 13 ba 09 e8 33 3e 37 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:ffffc90003d5eeb8 EFLAGS: 00000286 RAX: 894a570df80ab100 RBX: 0000000000000000 RCX: 894a570df80ab100 RDX: 0000000000000007 RSI: ffffffff8d76bea1 RDI: ffffffff8bbfc660 RBP: ffffc90003d5ef10 R08: ffffffff8f805b77 R09: 1ffffffff1f00b6e R10: dffffc0000000000 R11: fffffbfff1f00b6f R12: ffff8880306e9e80 R13: dffffc0000000000 R14: ffff88801ca85b80 R15: ffff8880b893b358 context_switch kernel/sched/core.c:5259 [inline] __schedule+0x14c4/0x5000 kernel/sched/core.c:6863 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 __debug_check_no_obj_freed lib/debugobjects.c:1108 [inline] debug_check_no_obj_freed+0x52e/0x550 lib/debugobjects.c:1129 free_pages_prepare mm/page_alloc.c:1401 [inline] __free_frozen_pages+0x4dd/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_kmalloc+0x22/0xb0 mm/kasan/common.c:408 kasan_kmalloc include/linux/kasan.h:262 [inline] __do_kmalloc_node mm/slub.c:5652 [inline] __kvmalloc_node_noprof+0x5c9/0x910 mm/slub.c:7128 kvmalloc_array_node_noprof include/linux/slab.h:1122 [inline] compute_postorder+0x12d/0x970 kernel/bpf/verifier.c:18406 bpf_check+0x20d4/0x1c300 kernel/bpf/verifier.c:25230 bpf_prog_load+0x13ba/0x1a10 kernel/bpf/syscall.c:3088 __sys_bpf+0x5c3/0x8a0 kernel/bpf/syscall.c:6207 __do_sys_bpf kernel/bpf/syscall.c:6320 [inline] __se_sys_bpf kernel/bpf/syscall.c:6318 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6318 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: 0033:0x7fbf4918f749 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:00007fbf4a10f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fbf493e5fa0 RCX: 00007fbf4918f749 RDX: 0000000000000094 RSI: 0000200000000200 RDI: 0000000000000005 RBP: 00007fbf49213f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbf493e6038 R14: 00007fbf493e5fa0 R15: 00007ffeb8b6e088