watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.0.7:5989] Modules linked in: irq event stamp: 11076381 hardirqs last enabled at (11076380): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (11076381): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (10896518): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (10896518): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (10896518): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (10896521): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (10896521): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (10896521): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 5989 Comm: syz.0.7 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:lock_release+0x2b5/0x3e0 kernel/locking/lockdep.c:5896 Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 cb 2a 02 11 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e RSP: 0000:ffffc90000006ff8 EFLAGS: 00000206 RAX: 3aa12a9abecc3c00 RBX: 0000000000000202 RCX: 3aa12a9abecc3c00 RDX: 0000000000000002 RSI: ffffffff8db86940 RDI: ffffffff8be2a100 RBP: ffff88802c9b0b40 R08: ffffc900000070ef R09: 0000000000000000 R10: ffffc900000070e0 R11: ffffffffa02019c8 R12: 0000000000000002 R13: 0000000000000002 R14: ffffffff8e13ee60 R15: ffff88802c9b0000 FS: 00007f61c0fb46c0(0000) GS:ffff888125c19000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30f19ff8 CR3: 000000003398e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] trace_call_bpf+0x5a9/0x850 kernel/trace/bpf_trace.c:148 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_noprof+0x1c1/0x3c0 mm/slub.c:4204 dst_alloc+0x105/0x170 net/core/dst.c:89 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x75/0x420 net/ipv6/route.c:3324 ndisc_send_skb+0x41f/0x1400 net/ipv6/ndisc.c:493 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4041 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 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_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7108 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 4b af 1f f6 e8 c6 cc 56 f6 fb bf 01 00 00 00 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0000:ffffc90004f3fdc0 EFLAGS: 00000282 RAX: 3aa12a9abecc3c00 RBX: 0000000000000000 RCX: 3aa12a9abecc3c00 RDX: 0000000000000000 RSI: ffffffff8d998fad RDI: 0000000000000001 RBP: ffffc90004f3fe70 R08: ffffffff8fa1f0f7 R09: 1ffffffff1f43e1e R10: dffffc0000000000 R11: fffffbfff1f43e1f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920009e7fb8 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:its_return_thunk+0x0/0x10 arch/x86/lib/retpoline.S:412 Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 cb 7b c0 f5 cc RSP: 0000:ffffc90004f3ff30 EFLAGS: 00000286 RAX: 3aa12a9abecc3c00 RBX: ffffc90004f3ff58 RCX: 3aa12a9abecc3c00 RDX: 0000000000000000 RSI: ffffffff8d998fad RDI: ffffffff8be2a100 RBP: 0000000000000000 R08: ffffffff8fa1f0f7 R09: 1ffffffff1f43e1e R10: dffffc0000000000 R11: fffffbfff1f43e1f R12: 0000000000000000 R13: 0000000000000000 R14: ffff88802c9b0000 R15: 0000000000000008 exit_to_user_mode_loop kernel/entry/common.c:99 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] irqentry_exit_to_user_mode+0x51/0x120 kernel/entry/common.c:184 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x7f61c318e929 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:00007f61c0fb4038 EFLAGS: 00000246 RAX: 0000000000000007 RBX: 00007f61c33b6160 RCX: 00007f61c318e929 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480 RBP: 00007f61c3210b39 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f61c33b6160 R15: 00007ffc84a2fcc8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5982 Comm: syz.2.3 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:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:638 [inline] RIP: 0010:cpu_online include/linux/cpumask.h:1197 [inline] RIP: 0010:trace_local_timer_exit arch/x86/include/asm/trace/irq_vectors.h:40 [inline] RIP: 0010:__sysvec_apic_timer_interrupt+0x125/0x410 arch/x86/kernel/apic/apic.c:1057 Code: 61 d3 b4 00 4c 8b 1b 48 89 df 2e e8 ad 1d 90 1e 0f 1f 44 00 00 65 8b 05 dd 56 30 11 83 f8 08 0f 83 09 01 00 00 89 c3 c1 e8 06 <48> 8d 3c c5 f0 f0 a1 8f be 08 00 00 00 e8 99 d5 b4 00 48 0f a3 1d RSP: 0018:ffffc90000a08708 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88802a54bc00 RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81aec04e R10: ffffc90000a08200 R11: ffffffff817014a0 R12: dffffc0000000000 R13: 0000000000000000 R14: 1ffff110170e4720 R15: 0000000000000000 FS: 00007f2a7b5f66c0(0000) GS:ffff888125d19000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005633b7b34168 CR3: 0000000032e86000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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:__slab_alloc_node mm/slub.c:3997 [inline] RIP: 0010:slab_alloc_node mm/slub.c:4185 [inline] RIP: 0010:kmem_cache_alloc_node_noprof+0xab/0x3c0 mm/slub.c:4249 Code: 85 c0 0f 85 74 01 00 00 89 6c 24 0c 0f 1f 44 00 00 48 c7 44 24 18 00 00 00 00 65 48 8b 05 f5 69 86 10 49 8b 0f 4c 8b 64 08 08 <4c> 8b 2c 08 48 8b 5c 08 10 66 90 4d 85 ed 0f 84 82 01 00 00 48 85 RSP: 0018:ffffc90000a087f8 EFLAGS: 00000246 RAX: ffff888125d19000 RBX: 0000000000000000 RCX: ffffffff92a29490 RDX: 0000000000000001 RSI: 00000000000002c0 RDI: ffffffff8e2625a0 RBP: 00000000ffffffff R08: 00000000ffffffff R09: 0000000000000000 R10: ffff888077a83780 R11: ffffffffa02019c8 R12: 000000000001a3f1 R13: dffffc0000000000 R14: 0000000000082820 R15: ffff88801ea95c80 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:579 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:670 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:__sanitizer_cov_trace_pc+0x46/0x70 kernel/kcov.c:222 Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 1c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 RSP: 0018:ffffc90004e4e6e0 EFLAGS: 00000246 RAX: ffffffff81f15db5 RBX: 0000000000000000 RCX: ffff88802a54bc00 RDX: ffffc9000cceb000 RSI: 000000000006631f RDI: ffffe8ffffd74000 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff8880b87329b0 R10: dffffc0000000000 R11: fffff91ffffae805 R12: ffffe8ffffd74000 R13: ffffffff8e00dea0 R14: ffff8880b87329b0 R15: dffffc0000000000 perf_trace_run_bpf_submit+0x35/0x170 kernel/events/core.c:10888 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 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 discard_slab mm/slub.c:2717 [inline] __put_partials+0x161/0x1c0 mm/slub.c:3186 put_cpu_partial+0x17c/0x250 mm/slub.c:3261 __slab_free+0x2f7/0x400 mm/slub.c:4513 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_slab_alloc+0x22/0x80 mm/kasan/common.c:329 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_noprof+0x1c1/0x3c0 mm/slub.c:4204 __kernfs_new_node+0xd7/0x7e0 fs/kernfs/dir.c:637 kernfs_new_node+0x102/0x210 fs/kernfs/dir.c:713 __kernfs_create_file+0x4b/0x2e0 fs/kernfs/file.c:1039 sysfs_add_file_mode_ns+0x238/0x300 fs/sysfs/file.c:319 create_files fs/sysfs/group.c:76 [inline] internal_create_group+0x66d/0x1110 fs/sysfs/group.c:183 internal_create_groups fs/sysfs/group.c:223 [inline] sysfs_create_groups+0x59/0x120 fs/sysfs/group.c:249 device_add_groups drivers/base/core.c:2839 [inline] device_add_attrs+0xe0/0x5a0 drivers/base/core.c:2903 device_add+0x496/0xb50 drivers/base/core.c:3646 netdev_register_kobject+0x156/0x2f0 net/core/net-sysfs.c:2336 register_netdevice+0x126c/0x1ae0 net/core/dev.c:11105 __ip_tunnel_create+0x3e7/0x560 net/ipv4/ip_tunnel.c:268 ip_tunnel_init_net+0x2ba/0x800 net/ipv4/ip_tunnel.c:1161 ops_init+0x35c/0x5c0 net/core/net_namespace.c:138 setup_net+0x219/0x4b0 net/core/net_namespace.c:442 copy_net_ns+0x31b/0x4d0 net/core/net_namespace.c:574 create_new_namespaces+0x3f3/0x720 kernel/nsproxy.c:110 copy_namespaces+0x438/0x4b0 kernel/nsproxy.c:175 copy_process+0x1733/0x3c00 kernel/fork.c:2172 kernel_clone+0x21e/0x870 kernel/fork.c:2599 __do_sys_clone kernel/fork.c:2742 [inline] __se_sys_clone kernel/fork.c:2726 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2726 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: 0033:0x7f2a7d78e929 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:00007f2a7b5f5fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f2a7d9b5fa0 RCX: 00007f2a7d78e929 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000010e322b000 RBP: 00007f2a7d810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2a7d9b5fa0 R15: 00007ffc26d9e748