watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.3.995:9585] Modules linked in: irq event stamp: 13778279 hardirqs last enabled at (13778278): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (13778279): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (11343932): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (11343932): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (11343932): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (11343935): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (11343935): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (11343935): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 9585 Comm: syz.3.995 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:148 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:172 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:191 [inline] RIP: 0010:kasan_check_range+0x29f/0x2c0 mm/kasan/generic.c:200 Code: f3 49 83 c3 05 eb 07 4d 01 f3 49 83 c3 06 4d 89 dc 4d 85 db 0f 84 44 ff ff ff 4d 01 d1 4d 39 cc 75 11 41 83 e0 07 45 0f be 09 <45> 39 c8 0f 8c 2b ff ff ff 0f b6 d2 e8 d0 ee ff ff 34 01 e9 1c ff RSP: 0018:ffffc90000007080 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffffffffffffff RCX: ffffffff819cdc27 RDX: 0000000000000000 RSI: 000000000000000d RDI: ffffffff8b6be780 RBP: ffffc900000071d8 R08: 0000000000000004 R09: 0000000000000006 R10: dffffc0000000000 R11: fffffbfff16d7cf1 R12: fffffbfff16d7cf1 R13: 000000000000000e R14: fffffbfff16d7cf2 R15: 1ffffffff16d7cf0 FS: 00007f17db1b06c0(0000) GS:ffff888125d0c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f17db18fd58 CR3: 0000000069ea0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x2c7/0x410 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:5831 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [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:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2523 [inline] slab_free mm/slub.c:6611 [inline] kmem_cache_free+0x19b/0x690 mm/slub.c:6721 skb_release_data+0x62d/0x7c0 net/core/skbuff.c:1087 skb_release_all net/core/skbuff.c:1152 [inline] __kfree_skb net/core/skbuff.c:1166 [inline] sk_skb_reason_drop+0x127/0x170 net/core/skbuff.c:1204 kfree_skb_reason include/linux/skbuff.h:1322 [inline] kfree_skb include/linux/skbuff.h:1331 [inline] ip6_mc_input+0x8de/0xb70 net/ipv6/ip6_input.c:593 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318 __netif_receive_skb_one_core net/core/dev.c:6079 [inline] __netif_receive_skb+0xd3/0x380 net/core/dev.c:6192 process_backlog+0x60e/0x14f0 net/core/dev.c:6544 __napi_poll+0xc7/0x360 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [inline] net_rx_action+0x5f7/0xdf0 net/core/dev.c:7784 handle_softirqs+0x286/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:schedule_debug kernel/sched/core.c:-1 [inline] RIP: 0010:__schedule+0x2c5/0x4cc0 kernel/sched/core.c:6806 Code: 74 28 80 3d e2 21 3b 04 00 75 1f c6 05 d9 21 3b 04 01 48 c7 c7 c0 4b 6a 8b be 11 17 00 00 48 c7 c2 20 55 6a 8b e8 fb e2 50 f6 <4c> 89 74 24 18 4c 89 7c 24 30 0f 1f 44 00 00 48 c7 c0 20 12 9e 8f RSP: 0018:ffffc90004057260 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc90004050000 RCX: 989ac9f23f765f00 RDX: 0000000000000000 RSI: ffffffff8d9d15ee RDI: ffffffff8bc07760 RBP: ffffc90004057470 R08: ffffffff8f9e1077 R09: 1ffffffff1f3c20e R10: dffffc0000000000 R11: fffffbfff1f3c20f R12: ffff888125d0c000 R13: 0000000000000001 R14: ffff888024c91e40 R15: 1ffff110170c7568 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 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 7c 16 00 00 00 74 2c 8b 91 58 16 00 00 83 fa 02 75 21 48 8b 91 60 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 5c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 RSP: 0018:ffffc900040575f8 EFLAGS: 00000246 RAX: ffffffff8230fdff RBX: 0000000000000000 RCX: ffff888024c91e40 RDX: ffffc9000bf31000 RSI: 0000000000001775 RDI: 0000000000000000 RBP: 0000000000000400 R08: ffff88801c4152bf R09: 1ffff11003882a57 R10: dffffc0000000000 R11: ffffed1003882a58 R12: ffff88801c415270 R13: 000000000000003b R14: 0000000000040401 R15: 000000000004043c page_ext_next include/linux/page_ext.h:108 [inline] page_ext_iter_next include/linux/page_ext.h:156 [inline] __page_table_check_zero+0x2af/0x530 mm/page_table_check.c:139 page_table_check_alloc include/linux/page_table_check.h:35 [inline] post_alloc_hook+0x253/0x2a0 mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 ___kmalloc_large_node+0x58/0x1b0 mm/slub.c:5570 __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:5599 __do_kmalloc_node mm/slub.c:5615 [inline] __kmalloc_node_noprof+0x138/0x800 mm/slub.c:5633 alloc_bulk+0x33b/0x530 kernel/bpf/memalloc.c:246 prefill_mem_cache kernel/bpf/memalloc.c:499 [inline] bpf_mem_alloc_init+0x45c/0xc60 kernel/bpf/memalloc.c:546 htab_map_alloc+0x727/0xc70 kernel/bpf/hashtab.c:567 map_create+0xaa6/0x1640 kernel/bpf/syscall.c:1497 __sys_bpf+0x5f0/0x860 kernel/bpf/syscall.c:6116 __do_sys_bpf kernel/bpf/syscall.c:6244 [inline] __se_sys_bpf kernel/bpf/syscall.c:6242 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6242 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f17da38eec9 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:00007f17db1b0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f17da5e5fa0 RCX: 00007f17da38eec9 RDX: 0000000000000048 RSI: 0000200000000100 RDI: 0000000000000000 RBP: 00007f17da411f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f17da5e6038 R14: 00007f17da5e5fa0 R15: 00007ffc523b4a28 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 9577 Comm: syz.2.992 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:109 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:127 [inline] RIP: 0010:__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] RIP: 0010:_raw_spin_lock_irqsave+0x6a/0xf0 kernel/locking/spinlock.c:162 Code: 8b 49 89 e7 49 c1 ef 03 48 b8 f1 f1 f1 f1 00 f3 f3 f3 49 bc 00 00 00 00 00 fc ff df 4b 89 04 27 48 c7 44 24 20 00 00 00 00 9c <8f> 44 24 20 4c 8b 74 24 20 fa 41 f7 c6 00 02 00 00 74 05 e8 4e 70 RSP: 0018:ffffc90000a07d78 EFLAGS: 00000802 RAX: f3f3f300f1f1f1f1 RBX: ffffffff99bec640 RCX: 0000000000006fb8 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff99bec640 RBP: ffffc90000a07e18 R08: ffffc90000a07e3f R09: 0000000000000000 R10: ffffc90000a07e30 R11: fffff52000140fc8 R12: dffffc0000000000 R13: dffffc0000000000 R14: 00000057d0cfc12f R15: 1ffff92000140fb0 FS: 00007fa0a081f6c0(0000) GS:ffff888125e0c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000002b642000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: debug_object_deactivate+0x9a/0x250 lib/debugobjects.c:873 debug_hrtimer_deactivate kernel/time/hrtimer.c:443 [inline] debug_deactivate+0x1d/0x200 kernel/time/hrtimer.c:483 __run_hrtimer kernel/time/hrtimer.c:1745 [inline] __hrtimer_run_queues+0x2b0/0xc60 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline] RIP: 0010:unwind_next_frame+0x132b/0x2390 arch/x86/kernel/unwind_orc.c:494 Code: b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 49 63 07 4c 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 8d 47 fc 48 0f 47 d8 <4d> 0f 46 ef 48 39 dd 76 a2 e9 7b ef ff ff 44 89 f9 80 e1 07 80 c1 RSP: 0018:ffffc90000a08238 EFLAGS: 00000206 RAX: ffffffff8fb0e390 RBX: ffffffff8fb0e390 RCX: ffffffff8fb0e398 RDX: ffffffff8fb0e390 RSI: ffffffff902b7970 RDI: ffffffff8bc07700 RBP: ffffffff8fb0e394 R08: 0000000000000002 R09: ffffffff8173cd25 R10: ffffc90000a07e48 R11: fffff52000140fcb R12: ffffffff816a6ca3 R13: ffffffff8fb0e390 R14: ffffc90000a08368 R15: ffffffff8fb0e394 __unwind_start+0x5b9/0x760 arch/x86/kernel/unwind_orc.c:758 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2523 [inline] slab_free mm/slub.c:6611 [inline] kmem_cache_free+0x19b/0x690 mm/slub.c:6721 skb_release_data+0x62d/0x7c0 net/core/skbuff.c:1087 skb_release_all net/core/skbuff.c:1152 [inline] __kfree_skb net/core/skbuff.c:1166 [inline] sk_skb_reason_drop+0x127/0x170 net/core/skbuff.c:1204 kfree_skb_reason include/linux/skbuff.h:1322 [inline] kfree_skb include/linux/skbuff.h:1331 [inline] ip6_mc_input+0x8de/0xb70 net/ipv6/ip6_input.c:593 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318 __netif_receive_skb_one_core net/core/dev.c:6079 [inline] __netif_receive_skb+0xd3/0x380 net/core/dev.c:6192 process_backlog+0x60e/0x14f0 net/core/dev.c:6544 __napi_poll+0xc7/0x360 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [inline] net_rx_action+0x5f7/0xdf0 net/core/dev.c:7784 handle_softirqs+0x286/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__schedule+0x0/0x4cc0 kernel/sched/core.c:6785 Code: d9 f6 45 89 f8 89 d9 48 8b 5c 24 08 e9 ee fe ff ff cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 RSP: 0018:ffffc90003ce6e78 EFLAGS: 00000246 RAX: 1ffff110065f42a4 RBX: ffffffff8b4d28fe RCX: 0000000000000000 RDX: 0000000000000006 RSI: ffffffff8d7e8438 RDI: 0000000000000001 RBP: ffffc90003ce6f18 R08: ffffffff8f9e1077 R09: 1ffffffff1f3c20e R10: dffffc0000000000 R11: fffffbfff1f3c20f R12: dffffc0000000000 R13: ffffffff8e142600 R14: ffff888032fa1520 R15: dffffc0000000000 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:7113 preempt_schedule+0xae/0xc0 kernel/sched/core.c:7137 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 rcu_preempt_deferred_qs_irqrestore+0x89c/0xce0 kernel/rcu/tree_plugin.h:-1 rcu_read_unlock_special+0x3a2/0x4b0 kernel/rcu/tree_plugin.h:770 __rcu_read_unlock+0x84/0xe0 kernel/rcu/tree_plugin.h:438 rcu_read_unlock include/linux/rcupdate.h:899 [inline] class_rcu_destructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0x19ae/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:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4955 [inline] slab_alloc_node mm/slub.c:5265 [inline] kmem_cache_alloc_noprof+0x367/0x6e0 mm/slub.c:5272 alloc_vfsmnt+0x23/0x430 fs/namespace.c:302 clone_mnt+0x4b/0x9a0 fs/namespace.c:1261 copy_tree+0x3d4/0x930 fs/namespace.c:2203 copy_mnt_ns+0x19d/0x870 fs/namespace.c:4136 create_new_namespaces+0xd1/0x720 kernel/nsproxy.c:78 copy_namespaces+0x438/0x4b0 kernel/nsproxy.c:175 copy_process+0x1733/0x3c00 kernel/fork.c:2184 kernel_clone+0x21e/0x840 kernel/fork.c:2609 __do_sys_clone kernel/fork.c:2750 [inline] __se_sys_clone kernel/fork.c:2734 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2734 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa09f98eec9 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:00007fa0a081efe8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fa09fbe6090 RCX: 00007fa09f98eec9 RDX: 00002000000004c0 RSI: 0000200000003300 RDI: 0000000020820080 RBP: 00007fa09fa11f91 R08: 0000200000000540 R09: 0000200000000540 R10: 0000200000000500 R11: 0000000000000202 R12: 0000000000000000 R13: 00007fa09fbe6128 R14: 00007fa09fbe6090 R15: 00007ffc80b6c328