watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.0.3781:15637]
Modules linked in:
CPU: 0 PID: 15637 Comm: syz.0.3781 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
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:184 [inline]
RIP: 0010:__raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
RIP: 0010:_raw_spin_lock_bh+0x98/0xf0 kernel/locking/spinlock.c:175
Code: 44 27 04 04 c7 44 24 20 00 00 00 00 48 89 df be 04 00 00 00 e8 69 c2 1c fd 4c 89 f7 be 04 00 00 00 e8 5c c2 1c fd 8b 44 24 20 <b9> 01 00 00 00 f0 0f b1 0b 75 33 43 c6 44 27 04 f8 48 c7 04 24 0e
RSP: 0018:ffffc90000d26960 EFLAGS: 00000297
RAX: 0000000000000000 RBX: ffffc90000d26e54 RCX: ffffffff84827a54
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000d26980
RBP: ffffc90000d269f0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520001a4d30 R12: dffffc0000000000
R13: ffff888119ecd980 R14: ffffc90000d26980 R15: 1ffff920001a4d2c
FS:  00007ffa48d836c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001341e4000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 spin_lock_bh include/linux/spinlock.h:360 [inline]
 tipc_skb_peek_port net/tipc/msg.h:1248 [inline]
 tipc_sk_rcv+0x230/0x1df0 net/tipc/socket.c:2493
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679
 tipc_node_xmit_skb net/tipc/node.c:1744 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1759
 tipc_sk_rcv+0x1913/0x1df0 net/tipc/socket.c:2503
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679
 tipc_sk_push_backlog net/tipc/socket.c:1307 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2259 [inline]
 tipc_sk_filter_rcv+0x19ad/0x3860 net/tipc/socket.c:2368
 tipc_sk_enqueue net/tipc/socket.c:2448 [inline]
 tipc_sk_rcv+0x745/0x1df0 net/tipc/socket.c:2499
 tipc_node_xmit+0x36c/0xd80 net/tipc/node.c:1679
 tipc_node_xmit_skb net/tipc/node.c:1744 [inline]
 tipc_node_distr_xmit+0x277/0x390 net/tipc/node.c:1759
 tipc_sk_backlog_rcv+0x174/0x220 net/tipc/socket.c:2416
 sk_backlog_rcv include/net/sock.h:1071 [inline]
 __release_sock+0x146/0x360 net/core/sock.c:2588
 release_sock net/core/sock.c:3141 [inline]
 sock_setsockopt+0x1801/0x2620 net/core/sock.c:1256
 __sys_setsockopt+0x272/0x480 net/socket.c:2143
 __do_sys_setsockopt net/socket.c:2158 [inline]
 __se_sys_setsockopt net/socket.c:2155 [inline]
 __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2155
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7ffa4a34b159
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:00007ffa48d83028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007ffa4a5d3090 RCX: 00007ffa4a34b159
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 00000000000000f4
RBP: 00007ffa4a3e206b R08: 0000000000000004 R09: 0000000000000000
R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffa4a5d3128 R14: 00007ffa4a5d3090 R15: 00007ffed84243b8
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
NMI backtrace for cpu 1 skipped: idling at default_idle+0x12/0x20 arch/x86/kernel/process.c:717