watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.3.399:1691] Modules linked in: CPU: 0 PID: 1691 Comm: syz.3.399 Not tainted 5.10.237-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:202 [inline] RIP: 0010:atomic_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:707 [inline] RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:82 [inline] RIP: 0010:do_raw_spin_lock include/linux/spinlock.h:183 [inline] RIP: 0010:__raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] RIP: 0010:_raw_spin_lock_bh+0x92/0xe0 kernel/locking/spinlock.c:175 Code: e4 70 cf fc c7 44 24 20 00 00 00 00 48 89 df be 04 00 00 00 e8 4f f3 28 fd 4c 89 f7 be 04 00 00 00 e8 42 f3 28 fd 8b 44 24 20 01 00 00 00 f0 0f b1 0b 75 2d 48 c7 04 24 0e 36 e0 45 4b c7 04 RSP: 0018:ffffc90000cd6a20 EFLAGS: 00000297 RAX: 0000000000000000 RBX: ffffc90000cd6ef4 RCX: ffffffff8474917e RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000cd6a40 RBP: ffffc90000cd6ab0 R08: 0000000000000004 R09: 0000000000000003 R10: fffff5200019ad48 R11: 1ffff9200019ad48 R12: dffffc0000000000 R13: ffffc90000cd6ef0 R14: ffffc90000cd6a40 R15: 1ffff9200019ad44 FS: 00007f447839e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c2e7111 CR3: 000000011d4f6000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_lock_bh include/linux/spinlock.h:359 [inline] tipc_skb_peek_port net/tipc/msg.h:1248 [inline] tipc_sk_rcv+0x221/0x1ef0 net/tipc/socket.c:2487 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:1052 [inline] __release_sock+0x146/0x360 net/core/sock.c:2583 release_sock+0x60/0x1b0 net/core/sock.c:3134 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 kernel/entry/common.c:199 [inline] syscall_exit_to_user_mode+0x68/0x90 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f4479d35969 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:00007f447839e038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007f4479f5cfa0 RCX: 00007f4479d35969 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000006 RBP: 00007f4479db7ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4479f5cfa0 R15: 00007ffc01180608 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1697 Comm: ’ Not tainted 5.10.237-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 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 bf 9d 98 03 f4 eb 0e 0f 1f 44 00 00 0f 00 2d b0 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:ffffc900012e7580 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff88810ba1c088 RCX: ffffffff814b15ba RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88810ba1c088 RBP: ffffc900012e7630 R08: dffffc0000000000 R09: ffffed1021743812 R10: ffffed1021743812 R11: 1ffff11021743811 R12: 0000000000000246 R13: 1ffff11021743811 R14: dffffc0000000000 R15: 1ffff9200025ceb4 FS: 00007f447837d6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000006000 CR3: 000000011d4f6000 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:3117 lock_sock include/net/sock.h:1648 [inline] tipc_sendstream+0x47/0x70 net/tipc/socket.c:1540 sock_sendmsg_nosec net/socket.c:652 [inline] __sock_sendmsg net/socket.c:664 [inline] ____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2376 ___sys_sendmsg+0x1f0/0x260 net/socket.c:2430 __sys_sendmmsg+0x273/0x450 net/socket.c:2516 __do_sys_sendmmsg net/socket.c:2545 [inline] __se_sys_sendmmsg net/socket.c:2542 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2542 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f4479d35969 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:00007f447837d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f4479f5d080 RCX: 00007f4479d35969 RDX: 000000000000000b RSI: 0000200000007ac0 RDI: 0000000000000006 RBP: 00007f4479db7ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200040d1 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4479f5d080 R15: 00007ffc01180608