watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.2.17:375] Modules linked in: CPU: 0 PID: 375 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 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+0x105/0x150 arch/x86/kernel/kvm.c:918 Code: 1c d6 03 f4 eb 87 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 ad 1c d6 03 fb f4 5e ff ff ff fb e9 58 ff ff ff e8 bb 82 7d 03 89 f9 80 e1 07 38 RSP: 0018:ffffc90003fa7900 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff88810c18d988 RCX: ffffffff81500649 RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88810c18d988 RBP: ffffc90003fa7990 R08: ffff88810c18d988 R09: 1ffff11021831b31 R10: dffffc0000000000 R11: ffffed1021831b32 R12: 1ffff1103ee00001 R13: ffff8881f7038ad4 R14: dffffc0000000000 R15: 1ffff920007f4f20 FS: 0000555573e6e500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa1c240c540 CR3: 000000012f35a000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:597 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x60f/0x9c0 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [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:188 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0xe4/0xf0 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:369 [inline] lock_sock_nested+0x95/0x2a0 net/core/sock.c:3278 lock_sock include/net/sock.h:1743 [inline] tipc_release+0xb2/0x1640 net/tipc/socket.c:639 __sock_release net/socket.c:649 [inline] sock_close+0xe0/0x270 net/socket.c:1335 __fput+0x20b/0x8b0 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fa1c23bee59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe8548a508 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fa1c2639da0 RCX: 00007fa1c23bee59 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fa1c2639da0 R08: 0000000000000006 R09: 0000000000000000 R10: 00007fa1c2639cb0 R11: 0000000000000246 R12: 0000000000035c2b R13: 00007fa1c263809c R14: 0000000000035951 R15: 00007fa1c2638090 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 376 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:instrument_atomic_read include/linux/instrumented.h:71 [inline] RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline] RIP: 0010:queued_spin_trylock include/asm-generic/qspinlock.h:63 [inline] RIP: 0010:do_raw_spin_trylock include/linux/spinlock.h:206 [inline] RIP: 0010:__raw_spin_trylock_bh include/linux/spinlock_api_smp.h:182 [inline] RIP: 0010:_raw_spin_trylock_bh+0x74/0x150 kernel/locking/spinlock.c:146 Code: 49 89 e5 49 c1 ed 03 48 b8 f1 f1 f1 f1 f8 f3 f3 f3 4b 89 44 25 00 4c 8b 75 08 bf 01 02 00 00 e8 e2 64 93 fc 43 c6 44 25 04 04 <48> 89 df be 04 00 00 00 e8 7f a0 f4 fc 48 89 d8 48 c1 e8 03 42 0f RSP: 0018:ffffc90000af6940 EFLAGS: 00000202 RAX: 0000000000000402 RBX: ffff88810c18d988 RCX: ffffffff870ccf03 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000201 RBP: ffffc90000af69d0 R08: ffff88810c18d983 R09: 1ffff11021831b30 R10: dffffc0000000000 R11: ffffed1021831b31 R12: dffffc0000000000 R13: 1ffff9200015ed28 R14: ffffffff84987e82 R15: 000000006e0feeb2 FS: 00007fa1c22216c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000003000 CR3: 000000012f35a000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_trylock_bh include/linux/spinlock.h:424 [inline] tipc_sk_rcv+0x3d2/0x2c20 net/tipc/socket.c:2498 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1703 tipc_node_xmit_skb+0xf7/0x150 net/tipc/node.c:1768 tipc_sk_rcv+0x1d30/0x2c20 net/tipc/socket.c:2524 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1703 tipc_sk_push_backlog net/tipc/socket.c:1316 [inline] tipc_sk_filter_connect net/tipc/socket.c:2257 [inline] tipc_sk_filter_rcv+0x154d/0x2d50 net/tipc/socket.c:2366 tipc_sk_enqueue net/tipc/socket.c:2447 [inline] tipc_sk_rcv+0x794/0x2c20 net/tipc/socket.c:2499 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1783 tipc_sk_backlog_rcv+0x17d/0x210 net/tipc/socket.c:2414 sk_backlog_rcv include/net/sock.h:1090 [inline] __release_sock+0x17c/0x3f0 net/core/sock.c:2737 release_sock+0x60/0x1b0 net/core/sock.c:3290 tipc_release+0xd23/0x1640 net/tipc/socket.c:652 __sock_release net/socket.c:649 [inline] sock_close+0xe0/0x270 net/socket.c:1335 __fput+0x20b/0x8b0 fs/file_table.c:311 ____fput+0x15/0x20 fs/file_table.c:339 task_work_run+0x127/0x190 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fa1c23bee59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa1c2221028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007fa1c2637fa0 RCX: 00007fa1c23bee59 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003 RBP: 00007fa1c2454d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa1c2638038 R14: 00007fa1c2637fa0 R15: 00007ffe8548a3a8