watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz.6.4622:23753] Modules linked in: irq event stamp: 10776151 hardirqs last enabled at (10776150): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:199 hardirqs last disabled at (10776151): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (9887106): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (9887106): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (9887106): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (9887109): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (9887109): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (9887109): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 23753 Comm: syz.6.4622 Not tainted 6.16.0-syzkaller-ge8d780dcd957 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:memcpy_orig+0xc8/0x130 arch/x86/lib/memcpy_64.S:137 Code: 89 07 4c 89 4f 08 4c 89 54 17 f0 4c 89 5c 17 f8 e9 fd c1 02 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 fa 08 72 1b 4c 8b 06 <4c> 8b 4c 16 f8 4c 89 07 4c 89 4c 17 f8 e9 d6 c1 02 00 66 0f 1f 44 RSP: 0018:ffffc90000006ff8 EFLAGS: 00000206 RAX: ffffe8ffff8026d8 RBX: ffffe8ffff8026c0 RCX: ffffffff819cc0ea RDX: 000000000000000d RSI: ffffffff8b8bdae0 RDI: ffffe8ffff8026d8 RBP: ffffc90000007100 R08: 646165725f756372 R09: 1ffffd1ffff004dc R10: dffffc0000000000 R11: fffff91ffff004dd R12: ffff8880b8632aa8 R13: 000000000000000e R14: 000000000000002c R15: dffffc0000000000 FS: 00007ff429e1a6c0(0000) GS:ffff888125c7e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000023974000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602 Call Trace: do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x28a/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+0x3b2/0x3e0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 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:4179 [inline] slab_alloc_node mm/slub.c:4228 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4280 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:578 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:669 napi_alloc_skb+0x84/0x7d0 net/core/skbuff.c:811 page_to_skb+0x288/0x930 drivers/net/virtio_net.c:889 receive_mergeable drivers/net/virtio_net.c:2496 [inline] receive_buf+0x45f/0x15e0 drivers/net/virtio_net.c:2634 virtnet_receive_packets drivers/net/virtio_net.c:2992 [inline] virtnet_receive drivers/net/virtio_net.c:3016 [inline] virtnet_poll+0x1fbc/0x2d80 drivers/net/virtio_net.c:3110 __napi_poll+0xc7/0x360 net/core/dev.c:7497 napi_poll net/core/dev.c:7560 [inline] net_rx_action+0x707/0xe30 net/core/dev.c:7687 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_count_add+0x6/0x1a0 kernel/sched/core.c:5810 Code: 24 e8 3e c3 92 00 eb 8c e9 f1 fe ff ff 0f 1f 80 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 49 bf 00 00 00 00 00 fc ff df 48 c7 c0 40 73 a5 99 48 c1 RSP: 0018:ffffc9000bd26cc0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88802d860440 RCX: 0000000000080000 RDX: ffffc9001562a000 RSI: 000000000001bfdd RDI: 0000000000000001 RBP: ffffc9000bd26df8 R08: ffffc9000bd26d8f R09: 0000000000000000 R10: ffffc9000bd26d80 R11: fffff520017a4db2 R12: dffffc0000000000 R13: 1ffff11005b0c088 R14: ffff8880327bda00 R15: ffffffff8e00b7a8 class_preempt_constructor include/linux/preempt.h:472 [inline] migrate_disable+0x68/0x190 kernel/sched/core.c:2393 bpf_prog_run_array include/linux/bpf.h:2267 [inline] trace_call_bpf+0x229/0x850 kernel/trace/bpf_trace.c:146 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10891 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 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+0x3b2/0x3e0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 save_stack+0xf5/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706 __slab_free+0x303/0x3c0 mm/slub.c:4590 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] __kmalloc_cache_noprof+0x230/0x3d0 mm/slub.c:4395 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] do_check_common+0x206/0x2470 kernel/bpf/verifier.c:23156 do_check_main kernel/bpf/verifier.c:23341 [inline] bpf_check+0x1746a/0x1d2d0 kernel/bpf/verifier.c:24700 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2972 __sys_bpf+0x528/0x870 kernel/bpf/syscall.c:6022 __do_sys_bpf kernel/bpf/syscall.c:6132 [inline] __se_sys_bpf kernel/bpf/syscall.c:6130 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6130 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: 0033:0x7ff428f8eb69 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:00007ff429e1a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007ff4291b5fa0 RCX: 00007ff428f8eb69 RDX: 0000000000000094 RSI: 0000200000000780 RDI: 0000000000000005 RBP: 00007ff429011df1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff4291b5fa0 R15: 00007ffcd6ecba98 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 23748 Comm: syz.7.4620 Not tainted 6.16.0-syzkaller-ge8d780dcd957 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216 Code: 8b 3d 84 3e fa 0b 48 89 de 5b e9 03 5d 58 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 0c 25 08 20 9a 92 65 8b 15 08 6a da 10 81 e2 00 01 ff 00 RSP: 0018:ffffc90000a07e78 EFLAGS: 00000002 RAX: ffffffff81eeb344 RBX: 1ffff92000140fd4 RCX: a65aa68cbfd4c900 RDX: ffff888020b45a00 RSI: ffffffff8be30a60 RDI: ffffffff8be30a20 RBP: ffffc90000a07f90 R08: ffffc90000a07aaf R09: 0000000000000000 R10: ffffc90000a07aa0 R11: ffffffffa0201898 R12: ffffc90000a07ec0 R13: 00000000ffffffe4 R14: 0000000000000001 R15: ffffc90000a08140 FS: 00007fb87d1346c0(0000) GS:ffff888125d7e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000043b44000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_read_unlock include/linux/rcupdate.h:869 [inline] __perf_event_output kernel/events/core.c:8468 [inline] perf_event_output_forward+0x314/0x430 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+0x4dd/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+0x108/0x410 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:__kernel_text_address+0xd/0x40 kernel/extable.c:79 Code: e8 18 4d 96 00 eb b3 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 53 48 89 fb e8 43 00 00 00 <85> c0 0f 95 c0 48 81 fb 00 70 05 91 0f 93 c1 48 81 fb 70 b9 1b 91 RSP: 0018:ffffc90000a08698 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffffff8184fda9 RCX: a65aa68cbfd4c901 RDX: 0000000000000001 RSI: ffffffff8db664b4 RDI: ffffffff8184fda9 RBP: ffffc90000a08750 R08: ffffc90000a083af R09: 0000000000000000 R10: ffffc90000a083a0 R11: ffffffffa0201898 R12: ffff888020b45a00 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920001410e2 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26 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_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2416 [inline] slab_free mm/slub.c:4679 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4781 skb_release_data+0x62d/0x7c0 net/core/skbuff.c:1086 skb_release_all net/core/skbuff.c:1151 [inline] __kfree_skb net/core/skbuff.c:1165 [inline] consume_skb+0x9e/0xf0 net/core/skbuff.c:1397 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194 Code: 74 05 e8 db d2 54 f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 33 a6 1d f6 65 8b 05 0c b0 27 07 85 c0 74 40 48 c7 04 24 0e 36 RSP: 0018:ffffc9000c9df340 EFLAGS: 00000206 RAX: a65aa68cbfd4c900 RBX: 0000000000000a02 RCX: a65aa68cbfd4c900 RDX: 0000000000000000 RSI: ffffffff8d979717 RDI: 0000000000000001 RBP: ffffc9000c9df3c8 R08: ffffffff8fa08df7 R09: 1ffffffff1f411be R10: dffffc0000000000 R11: fffffbfff1f411bf R12: dffffc0000000000 R13: ffff888068e8d800 R14: ffffffff99d25898 R15: 1ffff9200193be68 __debug_check_no_obj_freed lib/debugobjects.c:1108 [inline] debug_check_no_obj_freed+0x451/0x470 lib/debugobjects.c:1129 slab_free_hook mm/slub.c:2347 [inline] slab_free mm/slub.c:4679 [inline] kfree+0x112/0x440 mm/slub.c:4878 free_func_state kernel/bpf/verifier.c:1666 [inline] free_verifier_state+0xaf/0x230 kernel/bpf/verifier.c:1682 pop_stack kernel/bpf/verifier.c:2075 [inline] free_states kernel/bpf/verifier.c:23106 [inline] do_check_common+0x1a3d/0x2470 kernel/bpf/verifier.c:23262 do_check_main kernel/bpf/verifier.c:23341 [inline] bpf_check+0x1746a/0x1d2d0 kernel/bpf/verifier.c:24700 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2972 __sys_bpf+0x528/0x870 kernel/bpf/syscall.c:6022 __do_sys_bpf kernel/bpf/syscall.c:6132 [inline] __se_sys_bpf kernel/bpf/syscall.c:6130 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6130 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: 0033:0x7fb87c38eb69 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:00007fb87d134038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb87c5b6080 RCX: 00007fb87c38eb69 RDX: 0000000000000048 RSI: 00002000000054c0 RDI: 0000000000000005 RBP: 00007fb87c411df1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb87c5b6080 R15: 00007ffddc3f5288