watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.4.49:6137] Modules linked in: irq event stamp: 10785615 hardirqs last enabled at (10785614): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (10785615): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (10734628): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (10734628): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (10734628): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (10734631): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (10734631): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (10734631): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6137 Comm: syz.4.49 Not tainted 6.16.0-rc3-syzkaller-g03fe01ddd1d8 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:unwind_next_frame+0xa64/0x2390 arch/x86/kernel/unwind_orc.c:-1 Code: 48 89 d0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 82 17 00 00 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 99 17 00 00 48 0f bf 02 <49> 01 c4 48 8d 5e 01 48 8b 44 24 40 0f b6 04 28 84 c0 0f 85 78 13 RSP: 0018:ffffc90000007418 EFLAGS: 00000246 RAX: 0000000000000010 RBX: ffffffff9038be3d RCX: ffffffff8fba7e10 RDX: ffffffff9038be3c RSI: ffffffff9038be40 RDI: ffffffff8be2a0a0 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff81729af5 R10: dffffc0000000000 R11: fffff91ffff93a05 R12: ffffc9000b8c76d8 R13: ffffc90000007538 R14: ffffc900000074e8 R15: ffffc90000007520 FS: 00007f5f22d176c0(0000) GS:ffff888125c19000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff48e4e56c0 CR3: 000000002f554000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_mempool_poison_object+0xad/0x130 mm/kasan/common.c:522 kasan_mempool_poison_object include/linux/kasan.h:360 [inline] napi_skb_cache_put+0x7b/0x730 net/core/skbuff.c:1422 __free_old_xmit+0x2c7/0x650 drivers/net/virtio_net.c:-1 virtnet_free_old_xmit drivers/net/virtio_net.c:610 [inline] free_old_xmit drivers/net/virtio_net.c:1045 [inline] virtnet_poll_tx+0x42b/0x1560 drivers/net/virtio_net.c:3196 __napi_poll+0xc4/0x480 net/core/dev.c:7414 napi_poll net/core/dev.c:7478 [inline] net_rx_action+0x707/0xe30 net/core/dev.c:7605 handle_softirqs+0x286/0x870 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:check_preemption_disabled+0x35/0x120 lib/smp_processor_id.c:55 Code: 48 8b 05 3e 5e 30 07 48 89 44 24 08 65 8b 05 46 5e 30 07 65 8b 0d 3b 5e 30 07 f7 c1 ff ff ff 7f 74 23 65 48 8b 0d 1b 5e 30 07 <48> 3b 4c 24 08 0f 85 cc 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d e9 RSP: 0018:ffffc9000b8c7588 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 7c953ca5cc693000 RDX: ffff888025430000 RSI: ffffffff8be2a0e0 RDI: ffffffff8be2a0a0 RBP: ffffc9000b8c76d8 R08: 0000000000000000 R09: ffffffff81cb9477 R10: dffffc0000000000 R11: fffff91ffff93605 R12: 0000000000000001 R13: 1ffff92001718ec8 R14: ffffffff81cb9477 R15: ffffffff8e00dea0 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:745 rcu_read_lock include/linux/rcupdate.h:842 [inline] trace_call_bpf+0xfb/0x850 kernel/trace/bpf_trace.c:145 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10891 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 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+0x311/0x360 kernel/locking/lockdep.c:5834 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_lru_noprof+0x1c6/0x3d0 mm/slub.c:4216 sock_alloc_inode+0x28/0xc0 net/socket.c:309 alloc_inode+0x67/0x1b0 fs/inode.c:346 new_inode_pseudo include/linux/fs.h:3364 [inline] sock_alloc net/socket.c:622 [inline] __sock_create+0x12d/0x9f0 net/socket.c:1505 sock_create net/socket.c:1599 [inline] __sys_socket_create net/socket.c:1636 [inline] __sys_socket+0xd7/0x1b0 net/socket.c:1683 __do_sys_socket net/socket.c:1697 [inline] __se_sys_socket net/socket.c:1695 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1695 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: 0033:0x7f5f21f8e929 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:00007f5f22d17038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f5f221b5fa0 RCX: 00007f5f21f8e929 RDX: 0000000000000084 RSI: 0000000000000005 RDI: 0000000000000002 RBP: 00007f5f22010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5f221b5fa0 R15: 00007ffe744e3198 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6145 Comm: syz.0.48 Not tainted 6.16.0-rc3-syzkaller-g03fe01ddd1d8 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:lockdep_recursion_inc kernel/locking/lockdep.c:468 [inline] RIP: 0010:lock_is_held_type+0x6d/0x190 kernel/locking/lockdep.c:5942 Code: 2c 25 08 70 a0 92 41 83 bd ec 0a 00 00 00 0f 85 d8 00 00 00 89 f5 49 89 fe 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 24 24 fa <48> c7 c7 00 c8 9a 8d e8 e7 16 00 00 65 ff 05 20 b4 30 07 41 83 bd RSP: 0018:ffffc90000a07498 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 2d407e87d875d000 RDX: ffff88801cfd0000 RSI: 00000000ffffffff RDI: ffffffff8e13ee60 RBP: 00000000ffffffff R08: 0000000000000000 R09: ffffffff81cb9477 R10: dffffc0000000000 R11: fffff91ffffb3e05 R12: 0000000000000046 R13: ffff88801cfd0000 R14: ffffffff8e13ee60 R15: ffffffff8e00df08 FS: 00007f02510276c0(0000) GS:ffff888125d19000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555579c5b5c8 CR3: 000000002fa44000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_call_bpf+0x1ad/0x850 kernel/trace/bpf_trace.c:146 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10891 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 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+0x311/0x360 kernel/locking/lockdep.c:5834 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] __perf_output_begin kernel/events/ring_buffer.c:167 [inline] perf_output_begin_forward+0xcd/0xa80 kernel/events/ring_buffer.c:277 __perf_event_output kernel/events/core.c:8459 [inline] perf_event_output_forward+0x2b2/0x430 kernel/events/core.c:8477 __perf_event_overflow+0x7cc/0xe10 kernel/events/core.c:10352 perf_swevent_hrtimer+0x3c5/0x550 kernel/events/core.c:11742 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x4e0/0xc60 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:86 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x89/0x2c0 mm/kasan/generic.c:189 Code: ff df 4f 8d 1c 17 49 ff c8 4d 89 c1 49 c1 e9 03 48 bb 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 <4d> 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 RSP: 0018:ffffc90000a08188 EFLAGS: 00000283 RAX: 0000000000000001 RBX: dffffc0000000001 RCX: ffffffff81c9cf95 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffe8ffffd9d024 RBP: 0000000000000000 R08: ffffe8ffffd9d02b R09: 1ffffd1ffffb3a05 R10: dffffc0000000000 R11: fffff91ffffb3a04 R12: 0000000000000002 R13: dffffc0000000000 R14: fffff91ffffb3a06 R15: 1ffffd1ffffb3a04 __asan_memset+0x22/0x50 mm/kasan/shadow.c:84 perf_trace_buf_alloc+0x1d5/0x2a0 kernel/trace/trace_event_perf.c:419 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x196/0x410 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+0x311/0x360 kernel/locking/lockdep.c:5834 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4249 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:660 skb_copy+0x188/0x800 net/core/skbuff.c:2125 mac80211_hwsim_tx_frame_no_nl+0xcd3/0x11c0 drivers/net/wireless/virtual/mac80211_hwsim.c:1871 mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2222 mac80211_hwsim_beacon_tx+0x3f0/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2323 __iterate_interfaces+0x2a8/0x590 net/mac80211/util.c:761 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:797 mac80211_hwsim_beacon+0xbb/0x1c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2353 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842 handle_softirqs+0x286/0x870 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:preempt_schedule+0x28/0xc0 kernel/sched/core.c:6982 Code: 90 90 f3 0f 1e fa 55 48 89 e5 41 56 53 48 83 e4 e0 48 83 ec 60 65 48 8b 05 35 50 2f 07 48 89 44 24 58 48 c7 04 24 b3 8a b5 41 <48> c7 44 24 08 5f c7 b5 8d 48 c7 44 24 10 d0 1f 71 8b 48 89 e3 48 RSP: 0018:ffffc9000b8af660 EFLAGS: 00000286 RAX: 2d407e87d875d000 RBX: 0000000000000a06 RCX: 0000000000000000 RDX: 0000000000000007 RSI: ffffffff8d998fad RDI: 00000000ffffffff RBP: ffffc9000b8af6d8 R08: ffffffff8fa1f0f7 R09: 1ffffffff1f43e1e R10: dffffc0000000000 R11: fffffbfff1f43e1f R12: dffffc0000000000 R13: 0000000000040001 R14: ffff88801a4409c0 R15: 1ffff92001715ee8 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 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] __slab_free+0x2d7/0x400 mm/slub.c:-1 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_kmalloc+0x22/0xb0 mm/kasan/common.c:385 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4328 [inline] __kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4340 kmalloc_noprof include/linux/slab.h:909 [inline] allocate_probes kernel/tracepoint.c:99 [inline] func_add kernel/tracepoint.c:159 [inline] tracepoint_add_func+0x35e/0xa10 kernel/tracepoint.c:292 tracepoint_probe_register_prio kernel/tracepoint.c:464 [inline] tracepoint_probe_register+0x5d/0x90 kernel/tracepoint.c:484 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline] perf_trace_event_init+0x4e1/0x9d0 kernel/trace/trace_event_perf.c:202 perf_trace_init+0x23d/0x2d0 kernel/trace/trace_event_perf.c:226 perf_tp_event_init+0x8d/0x120 kernel/events/core.c:10832 perf_try_init_event+0x17c/0x870 kernel/events/core.c:12561 perf_init_event kernel/events/core.c:12659 [inline] perf_event_alloc+0x1357/0x2bb0 kernel/events/core.c:12934 __do_sys_perf_event_open kernel/events/core.c:13452 [inline] __se_sys_perf_event_open+0x772/0x1d70 kernel/events/core.c:13333 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: 0033:0x7f025018e929 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:00007f0251027038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f02503b6080 RCX: 00007f025018e929 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000100 RBP: 00007f0250210b39 R08: 0000000000000009 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f02503b6080 R15: 00007ffcddc31ed8