watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.2.12350:19129] Modules linked in: irq event stamp: 13764247 hardirqs last enabled at (13764246): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (13764247): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (4167112): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (4167112): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (4167112): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (4167115): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (4167115): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (4167115): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 19129 Comm: syz.2.12350 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:perf_tp_event+0xde/0x29b0 kernel/events/core.c:11358 Code: f2 f2 f2 f2 f2 f2 f2 f2 4b 89 44 2c 28 48 b8 f8 f8 f8 f8 f3 f3 f3 f3 4b 89 44 2c 30 e8 4b cb cc ff 4b c7 44 2c 08 00 00 00 00 <4b> c7 44 2c 10 00 00 00 00 4b c7 44 2c 18 00 00 00 00 4b c7 44 2c RSP: 0018:ffffc90000006940 EFLAGS: 00000246 RAX: ffffffff81f8c035 RBX: ffffe8ffffc0fc60 RCX: ffff88802c618000 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 00000000000000eb RBP: ffffc90000006be8 R08: ffff8880b86333f8 R09: ffffe8ffffc0fc60 R10: dffffc0000000000 R11: fffff91ffff9e205 R12: 1ffff92000000d38 R13: dffffc0000000000 R14: ffffe8ffffcf1000 R15: ffffc90000006a00 FS: 00007f73c56016c0(0000) GS:ffff888125467000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe139fe9e80 CR3: 000000009bf9a000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:11306 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x345/0x440 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2a4/0x2e0 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] class_rcu_constructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 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:5219 [inline] __kmalloc_noprof+0x35c/0x760 mm/slub.c:5231 kmalloc_noprof include/linux/slab.h:966 [inline] kzalloc_noprof include/linux/slab.h:1200 [inline] cfg80211_inform_single_bss_data+0x952/0x1b70 net/wireless/scan.c:2344 cfg80211_inform_bss_data+0x266/0x3c40 net/wireless/scan.c:3226 cfg80211_inform_bss_frame_data+0x3c7/0x760 net/wireless/scan.c:3317 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:5305 [inline] ieee80211_rx_list+0x29e5/0x3710 net/mac80211/rx.c:5588 ieee80211_rx_napi+0x1b1/0x3e0 net/mac80211/rx.c:5611 ieee80211_rx include/net/mac80211.h:5267 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 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:memset_orig+0x8d/0xb0 arch/x86/lib/memset_64.S:107 Code: e1 38 74 14 c1 e9 03 66 0f 1f 44 00 00 ff c9 48 89 07 48 8d 7f 08 75 f5 83 e2 07 74 0a ff ca 88 07 48 8d 7f 01 75 f6 4c 89 d0 cc cc cc cc 48 83 fa 07 76 e3 48 89 07 49 c7 c0 08 00 00 00 4d RSP: 0018:ffffc90005e7f138 EFLAGS: 00000246 RAX: ffffc90005e7f340 RBX: ffffe8ffffc0fc60 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90005e7f350 RBP: ffffc90005e7f3e8 R08: ffffc90005e7f34f R09: 0000000000000000 R10: ffffc90005e7f340 R11: fffff52000bcfe6a R12: ffffe8ffffce9000 R13: dffffc0000000000 R14: ffffe8ffffce9000 R15: ffffc90005e7f200 perf_tp_event+0x12d/0x29b0 kernel/events/core.c:11362 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:11306 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x345/0x440 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2a4/0x2e0 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] class_rcu_constructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 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:5219 [inline] __kmalloc_node_track_caller_noprof+0x4db/0x7b0 mm/slub.c:5327 kmalloc_reserve net/core/skbuff.c:635 [inline] __alloc_skb+0x2c1/0x7d0 net/core/skbuff.c:713 alloc_skb include/linux/skbuff.h:1383 [inline] nlmsg_new include/net/netlink.h:1055 [inline] wireless_send_event+0x513/0xbd0 net/wireless/wext-core.c:592 ioctl_standard_call+0x145/0x1b0 net/wireless/wext-core.c:1048 wireless_process_ioctl net/wireless/wext-core.c:-1 [inline] wext_ioctl_dispatch+0xee/0x410 net/wireless/wext-core.c:1014 wext_handle_ioctl+0x10f/0x1d0 net/wireless/wext-core.c:1075 sock_ioctl+0x159/0x7f0 net/socket.c:1307 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 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: 0033:0x7f73c479c799 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:00007f73c5601028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f73c4a15fa0 RCX: 00007f73c479c799 RDX: 0000200000000040 RSI: 0000000000008b04 RDI: 0000000000000009 RBP: 00007f73c4832bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f73c4a16038 R14: 00007f73c4a15fa0 R15: 00007ffcf76d9b98 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5566 Comm: crond Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:match_held_lock+0x7d/0xb0 kernel/locking/lockdep.c:5337 Code: 10 64 c4 93 48 29 d0 48 c1 f8 03 48 ba 29 5c 8f c2 f5 28 5c 8f 48 0f af d0 bb 01 00 00 00 48 39 ca 74 02 31 db 89 d8 5b 41 5e cc cc cc cc cc 90 e8 a7 8e fd f8 85 c0 74 1c 83 3d f0 88 64 04 RSP: 0018:ffffc90000a083e0 EFLAGS: 00000046 RAX: 0000000000000001 RBX: ffff88802718c7e8 RCX: 0000000080010102 RDX: ffff88802718bc80 RSI: ffff8880b8728298 RDI: ffff88802718c7e8 RBP: 00000000ffffffff R08: ffffffff81b32fd7 R09: ffffffff9a2b3508 R10: dffffc0000000000 R11: ffffffff816b26e0 R12: 0000000000000046 R13: ffff88802718bc80 R14: ffff8880b8728298 R15: 0000000000000002 FS: 00007fbcdb324c80(0000) GS:ffff888125567000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 0000000031434000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __lock_is_held kernel/locking/lockdep.c:5601 [inline] lock_is_held_type+0x89/0x150 kernel/locking/lockdep.c:5940 lock_is_held include/linux/lockdep.h:249 [inline] __run_hrtimer kernel/time/hrtimer.c:1751 [inline] __hrtimer_run_queues+0x297/0xcc0 kernel/time/hrtimer.c:1849 hrtimer_interrupt+0x42b/0x1010 kernel/time/hrtimer.c:1911 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline] __sysvec_apic_timer_interrupt+0x102/0x460 arch/x86/kernel/apic/apic.c:1062 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x2e/0x70 kernel/kcov.c:217 Code: 48 8b 04 24 65 48 8b 0d 78 04 56 11 65 8b 15 99 04 56 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 54 16 00 00 00 <74> 2c 8b 91 30 16 00 00 83 fa 02 75 21 48 8b 91 38 16 00 00 48 8b RSP: 0018:ffffc90000a087a8 EFLAGS: 00000246 RAX: ffffffff81d5304d RBX: 0000000000000000 RCX: ffff88802718bc80 RDX: 0000000000000100 RSI: 00007fbcdb4e2c3a RDI: ffffffffa0205198 RBP: 0000000000000000 R08: ffffffff81d52f26 R09: ffffffff8e7602e0 R10: ffffc90000a08898 R11: ffffffff81b0b0d0 R12: ffffffffa0205198 R13: dffffc0000000000 R14: 00007fbcdb4e2c3a R15: ffff88804de7e428 bpf_tree_comp kernel/bpf/core.c:618 [inline] __lt_find include/linux/rbtree_latch.h:115 [inline] latch_tree_find include/linux/rbtree_latch.h:210 [inline] bpf_ksym_find kernel/bpf/core.c:716 [inline] is_bpf_text_address+0x14d/0x2b0 kernel/bpf/core.c:749 kernel_text_address+0xa5/0xe0 kernel/extable.c:125 __kernel_text_address+0xd/0x30 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:385 arch_stack_walk+0xfb/0x150 arch/x86/kernel/stacktrace.c:26 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 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2687 [inline] slab_free mm/slub.c:6124 [inline] kmem_cache_free+0x187/0x630 mm/slub.c:6254 mac80211_hwsim_beacon_tx+0x3e8/0x870 drivers/net/wireless/virtual/mac80211_hwsim.c:2365 __iterate_interfaces+0x2ab/0x590 net/mac80211/util.c:760 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:796 mac80211_hwsim_beacon+0xbb/0x180 drivers/net/wireless/virtual/mac80211_hwsim.c:2395 __run_hrtimer kernel/time/hrtimer.c:1785 [inline] __hrtimer_run_queues+0x53a/0xcc0 kernel/time/hrtimer.c:1849 hrtimer_run_softirq+0x182/0x5a0 kernel/time/hrtimer.c:1866 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:194 Code: f7 e8 4d 60 f2 f5 f7 c3 00 02 00 00 74 05 e8 70 af 1d f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 94 26 e4 f5 65 8b 05 8d cf 6b 07 85 c0 74 18 5b 41 5e c3 cc cc RSP: 0018:ffffc900035d7820 EFLAGS: 00000206 RAX: 0000000000000002 RBX: 0000000000000246 RCX: 0000000080000001 RDX: 0000000000000000 RSI: ffffffff8def2282 RDI: 0000000000000001 RBP: 1ffffffff1cecb00 R08: ffffffff90117db7 R09: 1ffffffff2022fb6 R10: dffffc0000000000 R11: fffffbfff2022fb7 R12: ffffffff8e765ee0 R13: ffffffff8e765e00 R14: ffffffff8e765e00 R15: 1ffffffff1cecbdb rcu_preempt_deferred_qs_irqrestore+0x7b9/0xbc0 kernel/rcu/tree_plugin.h:-1 __rcu_read_unlock+0x83/0xe0 kernel/rcu/tree_plugin.h:438 rcu_read_unlock include/linux/rcupdate.h:883 [inline] leave_rcu fs/namei.c:835 [inline] terminate_walk+0x3a9/0x510 fs/namei.c:852 path_openat+0x3052/0x3860 fs/namei.c:4831 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1383 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: 0033:0x7fbcdb4e2c3a Code: 41 89 f2 48 89 54 24 e0 41 83 e2 40 75 2a 89 f0 f7 d0 a9 00 00 41 00 74 1f 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff ff 0f 05 <48> 3d 00 f0 ff ff 77 2e c3 0f 1f 44 00 00 48 8d 44 24 08 c7 44 24 RSP: 002b:00007ffe9fa81d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000563ee4ebb2a0 RCX: 00007fbcdb4e2c3a RDX: 0000000000080000 RSI: 00007fbcdb57f45a RDI: 00000000ffffff9c RBP: 0000000000000008 R08: 0000000000000008 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000206 R12: 00007fbcdb57d7f4 R13: 00007fbcdb57d7f4 R14: 0000000000000001 R15: 000000000000001a