RBP: 00007f66f70c2c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f66f72d0038 R14: 00007f66f72cffa0 R15: 00007ffe37cc4108 watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.3.192:1119] Modules linked in: CPU: 1 PID: 1119 Comm: syz.3.192 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:rcu_preempt_read_exit kernel/rcu/tree_plugin.h:361 [inline] RIP: 0010:__rcu_read_unlock+0x2e/0xa0 kernel/rcu/tree_plugin.h:396 Code: 41 57 41 56 53 49 be 00 00 00 00 00 fc ff df 65 48 8b 3d 55 cd af 7e 48 8d 9f 08 04 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 30 <84> c0 75 2e ff 0b 75 1c 48 8d 9f 0c 04 00 00 48 89 d8 48 c1 e8 03 RSP: 0018:ffffc90000e9e978 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffff88810d4de6c8 RCX: 0000000000080000 RDX: ffffc90002920000 RSI: 000000000007ffff RDI: ffff88810d4de2c0 RBP: ffffc90000e9e990 R08: ffff88810c509483 R09: 1ffff110218a1290 R10: dffffc0000000000 R11: ffffed10218a1291 R12: dffffc0000000000 R13: ffff88810c509400 R14: dffffc0000000000 R15: fffffffffffffc18 FS: 00007f66f5ab16c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000091c0 CR3: 000000010d529000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_unlock include/linux/rcupdate.h:771 [inline] tipc_sk_lookup+0x544/0x5f0 net/tipc/socket.c:3000 tipc_sk_rcv+0x350/0x1dc0 net/tipc/socket.c:2488 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674 tipc_node_xmit_skb+0xf7/0x150 net/tipc/node.c:1739 tipc_sk_rcv+0x1c46/0x1dc0 net/tipc/socket.c:2518 tipc_node_xmit+0x26c/0xd80 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+0x15e5/0x3910 net/tipc/socket.c:2362 tipc_sk_enqueue net/tipc/socket.c:2442 [inline] tipc_sk_rcv+0x742/0x1dc0 net/tipc/socket.c:2493 tipc_node_xmit+0x26c/0xd80 net/tipc/node.c:1674 tipc_node_xmit_skb net/tipc/node.c:1739 [inline] tipc_node_distr_xmit+0x2a3/0x3b0 net/tipc/node.c:1754 tipc_sk_backlog_rcv+0x17d/0x210 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1071 [inline] __release_sock+0x146/0x360 net/core/sock.c:2589 release_sock+0x60/0x1b0 net/core/sock.c:3142 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: 0033:0x7f66f7054eb9 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:00007f66f5ab1028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007f66f72cffa0 RCX: 00007f66f7054eb9 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003 RBP: 00007f66f70c2c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f66f72d0038 R14: 00007f66f72cffa0 R15: 00007ffe37cc4108 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1123 Comm: syz.3.192 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:121 [inline] RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x58f/0xb70 kernel/locking/qspinlock.c:508 Code: 42 0f b6 04 38 84 c0 0f 85 c4 01 00 00 48 8b 44 24 08 c6 00 01 41 be 00 80 ff ff eb 07 f3 90 41 ff c6 74 4b 43 0f b6 44 3d 00 <84> c0 75 2e 80 3b 00 75 ea 48 89 df be 02 00 00 00 e8 6b 49 53 00 RSP: 0018:ffffc90000e4f7a0 EFLAGS: 00000286 RAX: 0000000000000000 RBX: ffff88810c509488 RCX: ffffffff814bed1a RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88810c509488 RBP: ffffc90000e4f890 R08: ffff88810c509488 R09: 1ffff110218a1291 R10: dffffc0000000000 R11: ffffed10218a1292 R12: ffff88823ff92f80 R13: 1ffff110218a1291 R14: 00000000ffffa1c5 R15: dffffc0000000000 FS: 00007f66f5a906c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f66f5a8fff8 CR3: 000000010d529000 CR4: 00000000003526b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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:184 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0xe4/0xf0 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:360 [inline] lock_sock_nested+0x90/0x2a0 net/core/sock.c:3125 lock_sock include/net/sock.h:1697 [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+0x5b7/0x8f0 net/socket.c:2376 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2430 __sys_sendmsg net/socket.c:2459 [inline] __do_sys_sendmsg net/socket.c:2468 [inline] __se_sys_sendmsg net/socket.c:2466 [inline] __x64_sys_sendmsg+0x1f9/0x2c0 net/socket.c:2466 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f66f7054eb9 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:00007f66f5a90028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f66f72d0090 RCX: 00007f66f7054eb9 RDX: 000000000002c8d0 RSI: 0000200000000400 RDI: 0000000000000003 RBP: 00007f66f70c2c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f66f72d0128 R14: 00007f66f72d0090 R15: 00007ffe37cc4108