watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.5.109:6587] Modules linked in: irq event stamp: 10924689 hardirqs last enabled at (10924688): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (10924689): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (10607854): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (10607854): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (10607854): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (10607857): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (10607857): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (10607857): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6587 Comm: syz.5.109 Not tainted 6.16.0-rc3-syzkaller-ge34a79b96ab9 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:lock_release+0x2c0/0x3e0 kernel/locking/lockdep.c:5896 Code: 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 ca fe 10 48 3b 44 24 28 0f 85 8b 00 00 00 <48> 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 0f RSP: 0018:ffffc90000a07f18 EFLAGS: 00000246 RAX: ec9b968bf219b800 RBX: 0000000000000202 RCX: ec9b968bf219b800 RDX: 0000000000000001 RSI: ffffffff8db6efc9 RDI: ffffffff8be28d40 RBP: ffff888026674718 R08: ffffc90000a0800f R09: 0000000000000000 R10: ffffc90000a08000 R11: ffffffffa020390c R12: 0000000000000001 R13: 0000000000000001 R14: ffffffff8e13ee60 R15: ffff888026673c00 FS: 00007ff850aa06c0(0000) GS:ffff888125d50000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000678000 CR3: 0000000032fea000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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 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:2381 [inline] slab_free mm/slub.c:4643 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4745 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:1275 [inline] kfree_skb include/linux/skbuff.h:1284 [inline] ip6_mc_input+0x9c3/0xbe0 net/ipv6/ip6_input.c:591 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:317 __netif_receive_skb_one_core net/core/dev.c:5977 [inline] __netif_receive_skb+0xd3/0x380 net/core/dev.c:6090 process_backlog+0x60e/0x14f0 net/core/dev.c:6442 __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:__schedule+0x0/0x4d00 kernel/sched/core.c:6662 Code: bc 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:ffffc900055bf718 EFLAGS: 00000246 RAX: 1ffff11004ccea1c RBX: 0000000000000000 RCX: dffffc0000000000 RDX: ffffc900279b2000 RSI: 000000000000023c RDI: 0000000000000001 RBP: ffffc900055bf7b0 R08: ffffc900055bf62f R09: 0000000000000000 R10: ffffc900055bf620 R11: ffffffffa020390c R12: 0000000000000002 R13: ffffffff8e13ee60 R14: dffffc0000000000 R15: 1ffff92000ab7ee4 preempt_schedule_notrace+0xd1/0x110 kernel/sched/core.c:7058 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:482 [inline] __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x347/0x360 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+0x6a/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_socketpair+0x1c5/0x560 net/socket.c:1746 __do_sys_socketpair net/socket.c:1799 [inline] __se_sys_socketpair net/socket.c:1796 [inline] __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1796 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: 0033:0x7ff84fb8e929 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:00007ff850aa0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007ff84fdb6080 RCX: 00007ff84fb8e929 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 00007ff84fc10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000200000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff84fdb6080 R15: 00007ffe2d727648 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6580 Comm: syz.7.107 Not tainted 6.16.0-rc3-syzkaller-ge34a79b96ab9 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline] RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:139 [inline] RIP: 0010:wrmsrq arch/x86/include/asm/msr.h:199 [inline] RIP: 0010:native_apic_msr_write+0x39/0x50 arch/x86/include/asm/apic.h:212 Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 cc cc cc cc cc f3 0f 1e fa 89 f6 31 d2 e9 52 17 87 03 66 RSP: 0018:ffffc90000005f48 EFLAGS: 00000046 RAX: 0000000000000155 RBX: ffff8880b8623900 RCX: 0000000000000838 RDX: 0000000000000000 RSI: 0000000000000155 RDI: 0000000000000838 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81aeb04e R10: ffffc90000005bc0 R11: ffffffff817004a0 R12: 0000000010004b7f R13: dffffc0000000000 R14: 0000000000000155 R15: 0000000000000020 FS: 00007fea27dfd6c0(0000) GS:ffff888125c50000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555d5505c8 CR3: 0000000033542000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: apic_write arch/x86/include/asm/apic.h:405 [inline] lapic_next_event+0x11/0x20 arch/x86/kernel/apic/apic.c:416 clockevents_program_event+0x1cf/0x360 kernel/time/clockevents.c:334 hrtimer_interrupt+0x620/0xaa0 kernel/time/hrtimer.c:1900 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:kmem_cache_alloc_noprof+0x0/0x3c0 mm/slub.c:4203 Code: a9 04 02 00 00 41 0f 94 c5 e9 b7 fc ff ff 90 0f 0b 90 e9 31 ff ff ff 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 89 f5 49 89 RSP: 0018:ffffc900000061b0 EFLAGS: 00000246 RAX: 1ffffffff1bccdba RBX: ffff88805a67cc80 RCX: ffff888064709e00 RDX: 0000000000000100 RSI: 0000000000000820 RDI: ffff88801ea93a00 RBP: ffff88805a67ccfe R08: 0000000000000000 R09: ffffffff894d1e9d R10: ffffc90000005f60 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000820 R14: 0000000000000820 R15: 0000000000000000 skb_clone+0x212/0x3a0 net/core/skbuff.c:2050 dev_queue_xmit_nit+0x416/0xcc0 net/core/dev.c:2555 xmit_one net/core/dev.c:3826 [inline] dev_hard_start_xmit+0x1be/0x830 net/core/dev.c:3846 sch_direct_xmit+0x241/0x4b0 net/sched/sch_generic.c:344 __dev_xmit_skb net/core/dev.c:4102 [inline] __dev_queue_xmit+0x17b6/0x3a70 net/core/dev.c:4679 neigh_output include/net/neighbour.h:539 [inline] ip_finish_output2+0xd40/0x1160 net/ipv4/ip_output.c:235 ip_local_out net/ipv4/ip_output.c:129 [inline] __ip_queue_xmit+0x1101/0x1b00 net/ipv4/ip_output.c:527 __tcp_transmit_skb+0x225c/0x36c0 net/ipv4/tcp_output.c:1479 tcp_rcv_established+0x13a3/0x1de0 net/ipv4/tcp_input.c:6284 tcp_v4_do_rcv+0xa23/0xce0 net/ipv4/tcp_ipv4.c:1925 tcp_v4_rcv+0x2676/0x2f00 net/ipv4/tcp_ipv4.c:2363 ip_protocol_deliver_rcu+0x221/0x440 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2fb/0x580 net/ipv4/ip_input.c:233 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:317 dst_input include/net/dst.h:469 [inline] ip_sublist_rcv_finish+0x21d/0x2a0 net/ipv4/ip_input.c:578 ip_list_rcv_finish net/ipv4/ip_input.c:627 [inline] ip_sublist_rcv+0x6e7/0x9b0 net/ipv4/ip_input.c:635 ip_list_rcv+0x3e2/0x430 net/ipv4/ip_input.c:669 __netif_receive_skb_list_ptype net/core/dev.c:6020 [inline] __netif_receive_skb_list_core+0x571/0x800 net/core/dev.c:6057 __netif_receive_skb_list net/core/dev.c:6119 [inline] netif_receive_skb_list_internal+0x975/0xcc0 net/core/dev.c:6210 gro_normal_list include/net/gro.h:532 [inline] gro_normal_one include/net/gro.h:546 [inline] gro_skb_finish net/core/gro.c:601 [inline] gro_receive_skb+0x642/0xce0 net/core/gro.c:631 napi_gro_receive include/linux/netdevice.h:4159 [inline] virtnet_receive_done+0xd1f/0x1af0 drivers/net/virtio_net.c:2534 receive_buf+0xb29/0x1690 drivers/net/virtio_net.c:2578 virtnet_receive_packets drivers/net/virtio_net.c:2926 [inline] virtnet_receive drivers/net/virtio_net.c:2950 [inline] virtnet_poll+0x1fd5/0x2d90 drivers/net/virtio_net.c:3045 __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:in_lock_functions+0x4/0x30 kernel/locking/spinlock.c:412 Code: 95 e8 d0 20 85 00 e9 61 ff ff ff 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 90 90 f3 0f 1e fa <48> 81 ff 90 40 69 8b 0f 93 c0 48 81 ff 24 86 69 8b 0f 92 c1 20 c1 RSP: 0018:ffffc900054bec40 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffffffff8b67e247 RCX: 0000000000000000 RDX: ffffc90027db3000 RSI: 000000000003c47f RDI: ffffffff8b67e247 RBP: ffffc900054becf0 R08: ffffc900054beb6f R09: 0000000000000000 R10: ffffc900054beb60 R11: ffffffffa020390c R12: 0000000000000002 R13: ffffffff8e13ee60 R14: dffffc0000000000 R15: 1ffff92000a97d8c get_lock_parent_ip include/linux/ftrace.h:1091 [inline] preempt_latency_start+0x20/0x70 kernel/sched/core.c:5852 preempt_schedule_notrace+0xc7/0x110 kernel/sched/core.c:7051 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:482 [inline] __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x347/0x360 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 __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: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:2381 [inline] slab_free mm/slub.c:4643 [inline] kfree+0x18e/0x440 mm/slub.c:4842 free_func_state kernel/bpf/verifier.c:1659 [inline] free_verifier_state kernel/bpf/verifier.c:1668 [inline] free_states kernel/bpf/verifier.c:22681 [inline] do_check_common+0x1b0d/0x20b0 kernel/bpf/verifier.c:22819 do_check_main kernel/bpf/verifier.c:22898 [inline] bpf_check+0x13664/0x19c60 kernel/bpf/verifier.c:24064 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2972 __sys_bpf+0x5f1/0x860 kernel/bpf/syscall.c:5836 __do_sys_bpf kernel/bpf/syscall.c:5943 [inline] __se_sys_bpf kernel/bpf/syscall.c:5941 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5941 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: 0033:0x7fea26f8e929 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:00007fea27dfd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fea271b5fa0 RCX: 00007fea26f8e929 RDX: 0000000000000048 RSI: 00002000000054c0 RDI: 0000000000000005 RBP: 00007fea27010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fea271b5fa0 R15: 00007ffcd9936df8