watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz-executor.0:1435] Modules linked in: CPU: 1 PID: 1435 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025 RIP: 0010:tipc_sk_rcv+0x1a22/0x1ef0 include/linux/refcount.h:-1 Code: 4c 89 ef e8 90 e1 32 ff eb 1b bf 01 00 00 00 44 89 f6 e8 e1 63 06 fd 45 85 f6 0f 8e 97 02 00 00 e8 23 60 06 fd 4c 8b 6c 24 10 <48> 8b 84 24 b8 00 00 00 42 0f b6 04 20 84 c0 0f 85 59 03 00 00 41 RSP: 0018:ffffc90003596840 EFLAGS: 00000293 RAX: ffffffff845d45ed RBX: ffffc90003596ca0 RCX: ffff888113160000 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000001 RBP: ffffc90003596ab0 R08: dffffc0000000000 R09: ffffed10224f7b31 R10: ffffed10224f7b31 R11: 1ffff110224f7b30 R12: dffffc0000000000 R13: ffffc90003596cb0 R14: 0000000000000005 R15: 0000000086791028 FS: 00007f463090d6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f463090dd58 CR3: 0000000104b8d000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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_rcv+0x19b9/0x1ef0 net/tipc/socket.c:2497 tipc_node_xmit+0x256/0xcd0 net/tipc/node.c:1674 tipc_sk_push_backlog+0x4dd/0x790 net/tipc/socket.c:1306 tipc_sk_conn_proto_rcv net/tipc/socket.c:1358 [inline] tipc_sk_proto_rcv+0x98d/0x1ac0 net/tipc/socket.c:2156 tipc_sk_filter_rcv+0x30ac/0x3850 net/tipc/socket.c:2350 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 net/core/sock.c:3134 [inline] sock_setsockopt+0x125e/0x2350 net/core/sock.c:1257 __sys_setsockopt+0x265/0x460 net/socket.c:2142 __do_sys_setsockopt net/socket.c:2157 [inline] __se_sys_setsockopt net/socket.c:2154 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2154 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f4630dacda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f463090d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f4630edb050 RCX: 00007f4630dacda9 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007f4630df947a R08: 0000000000000004 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f4630edb050 R15: 00007fff5d563f08 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1434 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:434 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x584/0xb70 kernel/locking/qspinlock.c:508 Code: 00 00 41 c6 06 00 48 8b 44 24 10 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 RSP: 0018:ffffc900035477a0 EFLAGS: 00000206 RAX: 0000000000000000 RBX: ffff8881127bd988 RCX: ffffffff814b263a RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8881127bd988 RBP: ffffc90003547890 R08: dffffc0000000000 R09: ffffed10224f7b32 R10: ffffed10224f7b32 R11: 1ffff110224f7b31 R12: ffff8881f73d2380 R13: 1ffff110224f7b31 R14: 00000000ffffc43f R15: dffffc0000000000 FS: 00007f463092e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 0000000104b8d000 CR4: 00000000003506b0 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: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_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+0x1e2/0x2a0 net/socket.c:2466 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f4630dacda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f463092e0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f4630edaf80 RCX: 00007f4630dacda9 RDX: 0000000000000000 RSI: 0000000020000b40 RDI: 0000000000000004 RBP: 00007f4630df947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f4630edaf80 R15: 00007fff5d563f08