watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.2.17:478] Modules linked in: CPU: 1 PID: 478 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] RIP: 0010:kvm_wait+0xf2/0x140 arch/x86/kernel/kvm.c:1064 Code: ab 13 04 f4 eb 9a fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07 40 38 f0 75 10 66 90 0f 00 2d b0 ab 13 04 fb f4 71 ff ff ff fb e9 6b ff ff ff e8 be 6d b8 03 89 f9 80 e1 07 38 RSP: 0018:ffffc900007bf8a0 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff888114756398 RCX: ffffffff84f3cd32 RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff888114756398 RBP: ffffc900007bf930 R08: dffffc0000000000 R09: ffffed10228eac74 R10: ffffed10228eac74 R11: 1ffff110228eac73 R12: 1ffff1103ee20001 R13: ffff8881f7138cd4 R14: dffffc0000000000 R15: 1ffff920000f7f14 FS: 000055555783b500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020004000 CR3: 000000011b1cc000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:603 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x690/0xc40 kernel/locking/qspinlock.c:511 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline] _raw_spin_lock_bh+0xd8/0xe0 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] lock_sock_nested+0x92/0x280 net/core/sock.c:3507 lock_sock include/net/sock.h:1769 [inline] tipc_release+0xb2/0x1650 net/tipc/socket.c:639 __sock_release net/socket.c:652 [inline] sock_close+0xf1/0x290 net/socket.c:1390 __fput+0x1fc/0x8f0 fs/file_table.c:320 ____fput+0x15/0x20 fs/file_table.c:348 task_work_run+0x1db/0x240 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x9b/0xb0 kernel/entry/common.c:177 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f45dd58cd29 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:00007ffc769db608 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f45dd7a7ba0 RCX: 00007f45dd58cd29 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f45dd7a7ba0 R08: 0000000000000000 R09: 00007ffc769db8ff R10: 00007f45dd7a7ac0 R11: 0000000000000246 R12: 000000000000e0e6 R13: 00007f45dd7a6080 R14: 0000000000000032 R15: ffffffffffffffff Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 479 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:preempt_count_add+0x42/0x1b0 kernel/sched/core.c:5899 Code: 97 87 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 01 01 00 00 83 3d 8e 74 4b 06 00 75 07 65 8b 05 2d d1 b6 7e 65 01 3d 26 d1 b6 7e <48> c7 c0 20 11 97 87 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 fc 00 RSP: 0018:ffffc900007ce8b8 EFLAGS: 00000202 RAX: 0000000000000201 RBX: ffff888114756398 RCX: ffffffff87971103 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000201 RBP: ffffc900007ce8d0 R08: dffffc0000000000 R09: ffffed10228eac71 R10: ffffed10228eac71 R11: 1ffff110228eac70 R12: dffffc0000000000 R13: 1ffff920000f9d1c R14: ffffffff84cca2ee R15: dffffc0000000000 FS: 00007f45de4576c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f45de435f98 CR3: 000000011b1cc000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __local_bh_disable_ip include/linux/bottom_half.h:13 [inline] __raw_spin_trylock_bh include/linux/spinlock_api_smp.h:172 [inline] _raw_spin_trylock_bh+0x6e/0x130 kernel/locking/spinlock.c:146 spin_trylock_bh include/linux/spinlock.h:411 [inline] tipc_sk_rcv+0x43e/0x2cc0 net/tipc/socket.c:2496 tipc_node_xmit+0x257/0xd00 net/tipc/node.c:1703 tipc_node_xmit_skb+0xe9/0x130 net/tipc/node.c:1768 tipc_sk_rcv+0x1def/0x2cc0 net/tipc/socket.c:2522 tipc_node_xmit+0x257/0xd00 net/tipc/node.c:1703 tipc_sk_push_backlog net/tipc/socket.c:1316 [inline] tipc_sk_filter_connect net/tipc/socket.c:2255 [inline] tipc_sk_filter_rcv+0x155f/0x2c80 net/tipc/socket.c:2364 tipc_sk_enqueue net/tipc/socket.c:2445 [inline] tipc_sk_rcv+0x7d9/0x2cc0 net/tipc/socket.c:2497 tipc_node_xmit+0x257/0xd00 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x292/0x390 net/tipc/node.c:1783 tipc_sk_backlog_rcv+0x16f/0x1f0 net/tipc/socket.c:2412 sk_backlog_rcv include/net/sock.h:1131 [inline] __release_sock+0x154/0x380 net/core/sock.c:2945 release_sock+0x60/0x1c0 net/core/sock.c:3519 tipc_release+0xd32/0x1650 net/tipc/socket.c:652 __sock_release net/socket.c:652 [inline] sock_close+0xf1/0x290 net/socket.c:1390 __fput+0x1fc/0x8f0 fs/file_table.c:320 ____fput+0x15/0x20 fs/file_table.c:348 task_work_run+0x1db/0x240 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x9b/0xb0 kernel/entry/common.c:177 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f45dd58cd29 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:00007f45de457038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007f45dd7a5fa0 RCX: 00007f45dd58cd29 RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000003 RBP: 00007f45dd60e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f45dd7a5fa0 R15: 00007ffc769db4a8