watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.6.923:9750] Modules linked in: irq event stamp: 12914079 hardirqs last enabled at (12914078): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (12914079): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (5617378): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (5617378): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (5617378): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (5617381): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (5617381): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (5617381): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 9750 Comm: syz.6.923 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x10/0x70 kernel/kcov.c:217 Code: de 5b e9 83 a8 5e 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 48 32 56 11 <65> 8b 15 69 32 56 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 RSP: 0018:ffffc90000007158 EFLAGS: 00000293 RAX: ffffffff81cf8ce3 RBX: 000000000000002c RCX: ffff88804875bd00 RDX: ffff88804875bd00 RSI: 0000000000000001 RDI: 0000000000000005 RBP: 0000000000000001 R08: ffffc90000007748 R09: 0000000000000000 R10: ffffc90000007438 R11: fffff52000000e89 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffffc90000007200 R15: 0000000000000001 FS: 00007f0d3b0916c0(0000) GS:ffff888125463000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001440 CR3: 0000000076bfc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_trace_buf_alloc+0x93/0x280 kernel/trace/trace_event_perf.c:415 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x1a0/0x410 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+0x392/0x3d0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:322 [inline] rcu_read_unlock include/linux/rcupdate.h:881 [inline] class_rcu_destructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0x1aaa/0x23c0 arch/x86/kernel/unwind_orc.c:695 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 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_mempool_unpoison_object+0x9f/0x130 mm/kasan/common.c:564 kasan_mempool_unpoison_object include/linux/kasan.h:391 [inline] napi_skb_cache_get+0x3c8/0x780 net/core/skbuff.c:306 __alloc_skb+0x146/0x7d0 net/core/skbuff.c:691 napi_alloc_skb+0x7a/0xaf0 net/core/skbuff.c:853 page_to_skb+0x2ce/0x870 drivers/net/virtio_net.c:887 receive_mergeable drivers/net/virtio_net.c:2497 [inline] receive_buf+0x546/0x1900 drivers/net/virtio_net.c:2643 virtnet_receive_packets drivers/net/virtio_net.c:2970 [inline] virtnet_receive drivers/net/virtio_net.c:2994 [inline] virtnet_poll+0x219e/0x2f90 drivers/net/virtio_net.c:3083 __napi_poll+0xae/0x340 net/core/dev.c:7692 napi_poll net/core/dev.c:7755 [inline] net_rx_action+0x627/0xf70 net/core/dev.c:7912 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:preempt_schedule_irq+0x48/0xa0 kernel/sched/core.c:7235 Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 63 c5 e4 f5 e8 1e 60 1e f6 fb bf 01 00 00 00 c3 a6 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 f4 61 1e f6 bf 01 RSP: 0018:ffffc900037f7b30 EFLAGS: 00000202 RAX: 0000000000459c75 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000006 RSI: ffffffff8def4ba2 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff90118cb7 R09: 1ffffffff2023196 R10: dffffc0000000000 R11: fffffbfff2023197 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 irqentry_exit+0x599/0x620 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:arch_jump_label_transform_queue+0x97/0x110 arch/x86/kernel/jump_label.c:-1 Code: c1 e9 03 42 0f b6 0c 39 84 c9 75 63 48 63 3b 48 01 df 89 d2 48 89 c6 31 c9 e8 85 72 44 0a 48 c7 c7 40 2d 60 8e e8 d9 9e 45 0a 0f e8 c2 e3 5b 00 48 89 df 89 ee e8 58 71 44 0a b0 01 5b 41 5e RSP: 0018:ffffc900037f7c50 EFLAGS: 00000246 RAX: 6c5fa245ecdd9600 RBX: ffffffff8e241050 RCX: ffffffff8baf5a9d RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc900037f7bc0 RBP: 0000000000000001 R08: ffffc900037f7bc7 R09: 1ffff920006fef78 R10: dffffc0000000000 R11: fffff520006fef79 R12: ffffffff8e252e70 R13: ffffffff8e241050 R14: 0000000000000003 R15: dffffc0000000000 __jump_label_update+0x185/0x380 kernel/jump_label.c:513 static_key_slow_inc_cpuslocked+0x86/0x120 kernel/jump_label.c:168 static_key_slow_inc+0x1a/0x30 kernel/jump_label.c:191 bpf_enable_runtime_stats kernel/bpf/syscall.c:5995 [inline] bpf_enable_stats+0x101/0x140 kernel/bpf/syscall.c:6014 __sys_bpf+0x722/0x950 kernel/bpf/syscall.c:6311 __do_sys_bpf kernel/bpf/syscall.c:6341 [inline] __se_sys_bpf kernel/bpf/syscall.c:6339 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6339 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: 0033:0x7f0d3a19c799 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:00007f0d3b091028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f0d3a415fa0 RCX: 00007f0d3a19c799 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020 RBP: 00007f0d3a232c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0d3a416038 R14: 00007f0d3a415fa0 R15: 00007ffe8bef8e48 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 9752 Comm: syz.3.924 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] RIP: 0010:rcu_is_watching+0x10/0xb0 kernel/rcu/tree.c:752 Code: 66 2e 0f 1f 84 00 00 00 00 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 53 65 ff 05 80 1e 71 11 eb 5a 03 0a 89 c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df RSP: 0018:ffffc90000a082c0 EFLAGS: 00000003 RAX: 0000000000000001 RBX: ffffffff931c6140 RCX: 0000000000000000 RDX: ffffffff81b33e00 RSI: 0000000000000004 RDI: ffffffff8e7bd200 RBP: ffff8880b87284e0 R08: ffffffff81b33e47 R09: ffffffff9a2b7508 R10: ffffc90000a07f48 R11: fffff52000140feb R12: ffffffff9a2b7508 R13: ffffffff81b33e47 R14: ffffffff9a2b7508 R15: ffffffff81b33e47 FS: 00007f334b3f66c0(0000) GS:ffff888125563000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f173e0ed040 CR3: 0000000033932000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x4b/0x3d0 kernel/locking/lockdep.c:5879 seqcount_lockdep_reader_access+0x64/0x100 include/linux/seqlock.h:74 ktime_get_update_offsets_now+0x67/0x3d0 kernel/time/timekeeping.c:2570 hrtimer_update_base kernel/time/hrtimer.c:641 [inline] hrtimer_interrupt+0x132/0x1010 kernel/time/hrtimer.c:1893 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:do_perf_trace_lock include/trace/events/lock.h:-1 [inline] RIP: 0010:perf_trace_lock+0x135/0x410 include/trace/events/lock.h:50 Code: 8d 1c dd 90 d7 1a 8e 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 48 22 8f 00 48 8b 44 24 18 48 03 03 48 89 44 24 18 <4c> 89 74 24 38 49 8d 5e 68 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 RSP: 0018:ffffc90000a08600 EFLAGS: 00000282 RAX: ffffe8ffffd52d80 RBX: ffffffff8e1ad798 RCX: 0000000000000102 RDX: ffffffff81767de5 RSI: ffffffff8c27b2e0 RDI: ffffffff8c27b2a0 RBP: ffffc90000a08700 R08: ffffc900053af450 R09: 0000000000000000 R10: ffffc90000a08898 R11: fffff52000141115 R12: dffffc0000000000 R13: 000000000000000d R14: ffffffff8e62a480 R15: 1ffff920001410c8 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x392/0x3d0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:322 [inline] rcu_read_unlock include/linux/rcupdate.h:881 [inline] class_rcu_destructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0x1aaa/0x23c0 arch/x86/kernel/unwind_orc.c:695 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 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:2692 [inline] slab_free mm/slub.c:6168 [inline] kmem_cache_free+0x187/0x630 mm/slub.c:6298 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:lock_is_held_type+0x106/0x150 kernel/locking/lockdep.c:5945 Code: 18 00 00 b8 ff ff ff ff 65 0f c1 05 04 20 6e 07 83 f8 01 75 25 9c 58 a9 00 02 00 00 75 39 41 f7 c4 00 02 00 00 74 01 fb 89 d8 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 cb e2 02 00 cc 90 0f 0b 90 48 c7 RSP: 0018:ffffc900053af1a8 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8e165812 RDI: ffffffff8c27b300 RBP: 00000000ffffffff R08: ffffffff90118cb7 R09: 1ffffffff2023196 R10: dffffc0000000000 R11: fffffbfff2023197 R12: 0000000000000246 R13: ffff888048759e80 R14: ffffffff8e75e440 R15: 1ffff110170e75b3 lock_is_held include/linux/lockdep.h:249 [inline] schedule_debug kernel/sched/core.c:5874 [inline] __schedule+0x213/0x52d0 kernel/sched/core.c:6783 preempt_schedule_notrace+0x57/0x90 kernel/sched/core.c:7185 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:469 [inline] perf_trace_lock_acquire+0x3a3/0x440 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] is_bpf_text_address+0x47/0x2b0 kernel/bpf/core.c:748 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 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] __kmalloc_cache_noprof+0x31c/0x660 mm/slub.c:5383 kmalloc_noprof include/linux/slab.h:950 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] bpf_prog_alloc_no_stats+0xdb/0x4f0 kernel/bpf/core.c:111 bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:156 bpf_prog_load+0x7ba/0x1ae0 kernel/bpf/syscall.c:2993 __sys_bpf+0x618/0x950 kernel/bpf/syscall.c:6228 __do_sys_bpf kernel/bpf/syscall.c:6341 [inline] __se_sys_bpf kernel/bpf/syscall.c:6339 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6339 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: 0033:0x7f334d19c799 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:00007f334b3f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f334d415fa0 RCX: 00007f334d19c799 RDX: 0000000000000094 RSI: 00002000000018c0 RDI: 0000000000000005 RBP: 00007f334d232c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f334d416038 R14: 00007f334d415fa0 R15: 00007ffc0a80ba58