RBP: 00007f9c7d4d8320 R08: 0000000000000000 R09: 0000000000000000 R10: 00002000000003c0 R11: 0000000000000246 R12: 00007f9c7d4a5084 R13: 0000200000004b40 R14: 0000200000010dd0 R15: 0000200000010c80 watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz-executor312:277] Modules linked in: CPU: 0 PID: 277 Comm: syz-executor312 Not tainted 5.10.237-syzkaller-00309-g7e2543346ff7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:arch_atomic_fetch_add arch/x86/include/asm/atomic.h:184 [inline] RIP: 0010:atomic_fetch_add_relaxed include/asm-generic/atomic-instrumented.h:143 [inline] RIP: 0010:__refcount_add include/linux/refcount.h:193 [inline] RIP: 0010:__refcount_inc include/linux/refcount.h:250 [inline] RIP: 0010:refcount_inc include/linux/refcount.h:267 [inline] RIP: 0010:sock_hold include/net/sock.h:732 [inline] RIP: 0010:tipc_sk_lookup+0x4e3/0x5f0 net/tipc/socket.c:2999 Code: 01 00 00 48 8b 44 24 08 0f b7 00 49 29 c5 74 67 49 8d 9d 80 00 00 00 48 89 df be 04 00 00 00 e8 f3 86 43 fd 41 be 01 00 00 00 45 0f c1 b5 80 00 00 00 31 ff 44 89 f6 e8 ca 98 09 fd 45 85 f6 RSP: 0018:ffffc90000b368c0 EFLAGS: 00000256 RAX: 0000000000000301 RBX: ffff88810c0c7280 RCX: ffffffff8459fdcd RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff88810c0c7280 RBP: ffffc90000b369b0 R08: dffffc0000000000 R09: ffffed1021818e51 R10: ffffed1021818e51 R11: 1ffff11021818e50 R12: dffffc0000000000 R13: ffff88810c0c7200 R14: 0000000000000001 R15: fffffffffffffc18 FS: 00007f9c7d40c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcb1c0a750 CR3: 000000011c246000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tipc_sk_rcv+0x3eb/0x1ef0 net/tipc/socket.c:2488 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 ptrace_notify+0x212/0x250 kernel/signal.c:2280 ptrace_report_syscall include/linux/tracehook.h:66 [inline] tracehook_report_syscall_exit include/linux/tracehook.h:129 [inline] arch_syscall_exit_tracehook include/linux/entry-common.h:285 [inline] syscall_exit_work+0x6e/0x140 kernel/entry/common.c:239 syscall_exit_to_user_mode_prepare kernel/entry/common.c:266 [inline] syscall_exit_to_user_mode+0x5b/0x90 kernel/entry/common.c:272 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f9c7d44baa9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 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:00007f9c7d40c218 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007f9c7d4d8328 RCX: 00007f9c7d44baa9 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003 RBP: 00007f9c7d4d8320 R08: 0000000000000000 R09: 0000000000000000 R10: 00002000000003c0 R11: 0000000000000246 R12: 00007f9c7d4a5084 R13: 0000200000004b40 R14: 0000200000010dd0 R15: 0000200000010c80