kthread+0x346/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz-executor:267] Modules linked in: CPU: 0 PID: 267 Comm: syz-executor Tainted: G W 5.10.238-syzkaller-00008-g59e9a7228857 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline] RIP: 0010:kvm_wait+0xc2/0x120 arch/x86/kernel/kvm.c:926 Code: 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d 3f 9d 98 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d 30 9d 98 03 fb f4 <4c> 89 64 24 18 ff 74 24 18 9d 48 c7 44 24 20 0e 36 e0 45 4b c7 04 RSP: 0018:ffffc90000b37440 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff88811bdc44c8 RCX: ffffffff814b175a RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88811bdc44c8 RBP: ffffc90000b374f0 R08: dffffc0000000000 R09: ffffed10237b889a R10: ffffed10237b889a R11: 1ffff110237b8899 R12: 0000000000000246 R13: 1ffff110237b8899 R14: dffffc0000000000 R15: 1ffff92000166e8c FS: 00005555899b2500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000010000 CR3: 000000011d9aa000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:564 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x714/0xb70 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock include/linux/spinlock.h:183 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0xd8/0xe0 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:359 [inline] lock_sock_nested+0x92/0x290 net/core/sock.c:3117 lock_sock include/net/sock.h:1648 [inline] tcp_recvmsg+0x229/0x2e10 net/ipv4/tcp.c:2149 inet_recvmsg+0x134/0x470 net/ipv4/af_inet.c:864 sock_recvmsg_nosec net/socket.c:905 [inline] sock_recvmsg net/socket.c:923 [inline] sock_read_iter+0x2a2/0x340 net/socket.c:996 call_read_iter include/linux/fs.h:2060 [inline] new_sync_read fs/read_write.c:415 [inline] vfs_read+0x874/0xa10 fs/read_write.c:496 ksys_read+0x140/0x240 fs/read_write.c:634 __do_sys_read fs/read_write.c:644 [inline] __se_sys_read fs/read_write.c:642 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:642 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fa1a6a482fd Code: a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb b5 e8 a8 48 00 00 0f 1f 84 00 00 00 00 00 80 3d 41 92 1f 00 00 74 17 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec RSP: 002b:00007ffdee68d8f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007ffdee68da00 RCX: 00007fa1a6a482fd RDX: 0000000000000004 RSI: 00007ffdee68d90c RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000417 R09: 001867e2b6877d94 R10: 000002199e29d400 R11: 0000000000000246 R12: 00007ffdee68dd20 R13: 0000000000000004 R14: 00007ffdee68d90c R15: 00007ffdee68d9a0 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 58 Comm: jbd2/sda1-8 Tainted: G W 5.10.238-syzkaller-00008-g59e9a7228857 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:66 [inline] RIP: 0010:halt arch/x86/include/asm/irqflags.h:112 [inline] RIP: 0010:kvm_wait+0xb2/0x120 arch/x86/kernel/kvm.c:921 Code: c1 e8 03 42 0f b6 04 30 84 c0 75 6d 0f b6 07 40 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d 3f 9d 98 03 f4 0e 0f 1f 44 00 00 0f 00 2d 30 9d 98 03 fb f4 4c 89 64 24 18 ff RSP: 0018:ffffc9000016f780 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffff8881f7147840 RCX: ffffffff814b175a RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8881f7147840 RBP: ffffc9000016f830 R08: dffffc0000000000 R09: ffffed103ee28f09 R10: ffffed103ee28f09 R11: 1ffff1103ee28f08 R12: 0000000000000046 R13: 1ffff1103ee28f08 R14: dffffc0000000000 R15: 1ffff9200002def4 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000014fad3000 CR4: 00000000003506a0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:564 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x714/0xb70 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock_flags include/linux/spinlock.h:195 [inline] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irqsave+0x108/0x110 kernel/locking/spinlock.c:159 lock_timer_base+0x127/0x270 kernel/time/timer.c:952 __mod_timer+0x10a/0xb30 kernel/time/timer.c:1025 add_timer+0x68/0x80 kernel/time/timer.c:1165 __queue_delayed_work+0x173/0x200 kernel/workqueue.c:1683 queue_delayed_work_on+0xde/0x130 kernel/workqueue.c:1708 queue_delayed_work include/linux/workqueue.h:530 [inline] schedule_delayed_work include/linux/workqueue.h:634 [inline] kvfree_call_rcu+0x417/0x620 kernel/rcu/tree.c:3564 trie_delete_elem+0x57a/0x710 kernel/bpf/lpm_trie.c:-1 bpf_prog_3d1485d3268e5ad0+0x40/0x71c bpf_dispatcher_nop_func include/linux/bpf.h:669 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2061 [inline] bpf_trace_run3+0xcb/0x230 kernel/trace/bpf_trace.c:2099 __bpf_trace_timer_start+0x2b/0x40 include/trace/events/timer.h:52 trace_timer_start include/trace/events/timer.h:52 [inline] enqueue_timer+0x337/0x480 kernel/time/timer.c:592 __mod_timer+0x79f/0xb30 kernel/time/timer.c:-1 mod_timer+0x1f/0x30 kernel/time/timer.c:1119 sk_reset_timer+0x22/0xb0 net/core/sock.c:3003 tcp_send_delayed_ack+0x30a/0x400 net/ipv4/tcp_output.c:3968 __tcp_ack_snd_check+0x420/0x8f0 net/ipv4/tcp_input.c:5542 tcp_ack_snd_check net/ipv4/tcp_input.c:5583 [inline] tcp_rcv_established+0x9f6/0x1980 net/ipv4/tcp_input.c:6008 tcp_v4_do_rcv+0x4c1/0x7c0 net/ipv4/tcp_ipv4.c:1698 tcp_v4_rcv+0x2157/0x26b0 net/ipv4/tcp_ipv4.c:2094 ip_protocol_deliver_rcu+0x2f0/0x640 net/ipv4/ip_input.c:204 ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip_local_deliver+0x2de/0x530 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:461 [inline] ip_sublist_rcv_finish net/ipv4/ip_input.c:558 [inline] ip_list_rcv_finish net/ipv4/ip_input.c:609 [inline] ip_sublist_rcv+0x747/0x860 net/ipv4/ip_input.c:617 ip_list_rcv+0x3da/0x420 net/ipv4/ip_input.c:652 __netif_receive_skb_list_ptype net/core/dev.c:5445 [inline] __netif_receive_skb_list_core+0x574/0x740 net/core/dev.c:5493 __netif_receive_skb_list net/core/dev.c:5545 [inline] netif_receive_skb_list_internal+0x7d2/0xa60 net/core/dev.c:5655 gro_normal_list net/core/dev.c:5809 [inline] napi_complete_done+0x36f/0x770 net/core/dev.c:6558 virtqueue_napi_complete drivers/net/virtio_net.c:357 [inline] virtnet_poll+0x8b4/0xef0 drivers/net/virtio_net.c:1537 napi_poll net/core/dev.c:6874 [inline] net_rx_action+0x432/0xdd0 net/core/dev.c:6944 __do_softirq+0x255/0x563 kernel/softirq.c:309 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:405 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447 sysvec_irq_work+0xbc/0xd0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:661 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x49/0x70 kernel/locking/spinlock.c:199 Code: 12 48 89 fb 48 c7 c7 f0 64 2c 86 e8 81 cc 28 fd 48 89 df 48 83 3d f6 ac b7 01 00 74 27 e8 f3 4d d6 fc 66 90 fb bf 01 00 00 00 82 4d cf fc 65 8b 05 77 b5 8d 7b 85 c0 74 03 5b 5d c3 e8 b3 b2 RSP: 0018:ffffc90000ad7ba8 EFLAGS: 00000246 RAX: 0000000000000001 RBX: dffffc0000000000 RCX: dffffc0000000000 RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffc90000ad7bb0 R08: dffffc0000000000 R09: fffffbfff0d463f3 R10: fffffbfff0d463f3 R11: 1ffffffff0d463f2 R12: ffff8881f7155fc0 R13: ffff888107394f2c R14: 0000000000000000 R15: ffff88810b36bb40 finish_lock_switch kernel/sched/core.c:3786 [inline] finish_task_switch+0x12e/0x5a0 kernel/sched/core.c:3886 context_switch kernel/sched/core.c:4051 [inline] __schedule+0xb4f/0x1310 kernel/sched/core.c:4806 schedule+0x13c/0x1d0 kernel/sched/core.c:4884 kjournald2+0x4b6/0x860 fs/jbd2/journal.c:249 kthread+0x346/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298