watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.2.1166:5174] Modules linked in: CPU: 0 PID: 5174 Comm: syz.2.1166 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x60 kernel/kcov.c:196 Code: 00 00 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d ec ac 3f 05 48 89 de e8 74 50 39 00 5b 5d c3 00 55 48 89 e5 48 8b 45 08 <65> 48 8b 0d d0 c7 9e 7e 65 8b 15 d5 c7 9e 7e f7 c2 00 01 ff 00 74 RSP: 0018:ffffc90000dd6970 EFLAGS: 00000246 RAX: ffffffff845c7411 RBX: dffffc0000000000 RCX: 0000000000080001 RDX: ffffc90002950000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: ffffc90000dd6970 R08: dffffc0000000000 R09: ffffed1022a23652 R10: ffffed1022a23652 R11: 1ffff11022a23651 R12: dffffc0000000000 R13: ffffc90000dd6c40 R14: ffffc90000dd6c40 R15: 00000000942b0892 FS: 00007fca1b2766c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000062e0 CR3: 0000000134d07000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __skb_dequeue include/linux/skbuff.h:2140 [inline] tipc_node_distr_xmit+0xb1/0x390 net/tipc/node.c:1751 tipc_sk_rcv+0x19b9/0x1ef0 net/tipc/socket.c:2497 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674 tipc_node_xmit_skb+0xe9/0x130 net/tipc/node.c:1739 tipc_sk_rcv+0x1d77/0x1ef0 net/tipc/socket.c:2518 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674 tipc_sk_push_backlog net/tipc/socket.c:1306 [inline] tipc_sk_filter_connect net/tipc/socket.c:2253 [inline] tipc_sk_filter_rcv+0x1581/0x3850 net/tipc/socket.c:2362 tipc_sk_enqueue net/tipc/socket.c:2442 [inline] tipc_sk_rcv+0x7cc/0x1ef0 net/tipc/socket.c:2493 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674 tipc_node_xmit_skb net/tipc/node.c:1739 [inline] tipc_node_distr_xmit+0x292/0x390 net/tipc/node.c:1754 tipc_sk_backlog_rcv+0x16f/0x1f0 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1058 [inline] __release_sock+0x146/0x360 net/core/sock.c:2588 release_sock+0x60/0x1b0 net/core/sock.c:3139 tipc_release+0xbd4/0x1490 net/tipc/socket.c:639 __sock_release net/socket.c:597 [inline] sock_close+0xe0/0x270 net/socket.c:1286 __fput+0x2fb/0x770 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x127/0x190 kernel/task_work.c:189 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fca1c80dfc9 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:00007fca1b276038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007fca1ca64fa0 RCX: 00007fca1c80dfc9 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003 RBP: 00007fca1c890f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca1ca65038 R14: 00007fca1ca64fa0 R15: 00007ffc99516268 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5180 Comm: syz.2.1166 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 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 af 98 98 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d a0 98 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:ffffc90000c87880 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff88811511b288 RCX: ffffffff814b25ba RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88811511b288 RBP: ffffc90000c87930 R08: dffffc0000000000 R09: ffffed1022a23652 R10: ffffed1022a23652 R11: 1ffff11022a23651 R12: 0000000000000246 R13: 1ffff11022a23651 R14: dffffc0000000000 R15: 1ffff92000190f14 FS: 00007fca1b2556c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fca1c7f3960 CR3: 0000000134d07000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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:3122 lock_sock include/net/sock.h:1684 [inline] tipc_recvstream+0x92/0xe80 net/tipc/socket.c:2029 sock_recvmsg_nosec net/socket.c:905 [inline] sock_recvmsg net/socket.c:923 [inline] __sys_recvfrom+0x35a/0x490 net/socket.c:2063 __do_sys_recvfrom net/socket.c:2081 [inline] __se_sys_recvfrom net/socket.c:2077 [inline] __x64_sys_recvfrom+0xe5/0x100 net/socket.c:2077 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fca1c80fd94 Code: 89 4c 24 1c e8 ed 5f 02 00 44 8b 54 24 1c 8b 3c 24 45 31 c9 89 c5 48 8b 54 24 10 48 8b 74 24 08 45 31 c0 b8 2d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 04 24 e8 39 60 02 00 48 8b 04 RSP: 002b:00007fca1b253ed0 EFLAGS: 00000246 ORIG_RAX: 000000000000002d RAX: ffffffffffffffda RBX: 00007fca1b253fc0 RCX: 00007fca1c80fd94 RDX: 0000000000001000 RSI: 00007fca1b254010 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00007fca1b253f68 R14: 00007fca1b254010 R15: 0000000000000000