watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz.3.720:10009] Modules linked in: irq event stamp: 350791247 hardirqs last enabled at (350791246): [] __local_bh_enable_ip+0x9e/0x120 kernel/softirq.c:455 hardirqs last disabled at (350791247): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (142): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (142): [] tipc_skb_peek_port net/tipc/msg.h:1235 [inline] softirqs last enabled at (142): [] tipc_sk_rcv+0x2e1/0x1c80 net/tipc/socket.c:2495 softirqs last disabled at (144): [] spin_trylock_bh include/linux/spinlock.h:414 [inline] softirqs last disabled at (144): [] tipc_sk_rcv+0x318/0x1c80 net/tipc/socket.c:2500 CPU: 0 UID: 0 PID: 10009 Comm: syz.3.720 Tainted: G U L syzkaller #0 PREEMPT(full) Tainted: [U]=USER, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 RIP: 0010:memcmp+0x60/0x1d0 lib/string.c:676 Code: 49 bd 00 00 00 00 00 fc ff df 49 01 dc eb 11 48 83 c3 01 48 83 c5 01 4c 39 e3 0f 84 25 01 00 00 48 89 d8 48 89 da 48 c1 e8 03 <83> e2 07 42 0f b6 04 28 38 d0 7f 08 84 c0 0f 85 2f 01 00 00 48 89 RSP: 0018:ffffc900054c6b90 EFLAGS: 00000a06 RAX: 1ffff11006677b90 RBX: ffff8880333bdc80 RCX: ffffc9000ef71000 RDX: ffff8880333bdc80 RSI: ffffc900054c6c38 RDI: ffff8880333bdc80 RBP: ffffc900054c6c38 R08: 0000000000000007 R09: ffff88807e92d14a R10: ffff8880333bdd08 R11: 0000000000000000 R12: ffff8880333bdc84 R13: dffffc0000000000 R14: ffff88807e92d14a R15: ffff88807e92c000 FS: 00007f45123f56c0(0000) GS:ffff888123ded000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000008000 CR3: 000000007795c000 CR4: 00000000003526f0 Call Trace: memcmp include/linux/fortify-string.h:677 [inline] rhashtable_compare include/linux/rhashtable.h:608 [inline] __rhashtable_lookup include/linux/rhashtable.h:636 [inline] rhashtable_lookup include/linux/rhashtable.h:673 [inline] tipc_sk_lookup+0x36e/0xa00 net/tipc/socket.c:3004 tipc_sk_rcv+0x2ee/0x1c80 net/tipc/socket.c:2496 tipc_node_xmit+0x23e/0xfb0 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x177/0x3c0 net/tipc/node.c:1781 tipc_sk_rcv+0xaab/0x1c80 net/tipc/socket.c:2505 tipc_node_xmit+0x23e/0xfb0 net/tipc/node.c:1701 tipc_sk_push_backlog+0x318/0xa00 net/tipc/socket.c:1313 tipc_sk_filter_connect net/tipc/socket.c:2259 [inline] tipc_sk_filter_rcv+0x95d/0x3250 net/tipc/socket.c:2368 tipc_sk_enqueue net/tipc/socket.c:2449 [inline] tipc_sk_rcv+0xe90/0x1c80 net/tipc/socket.c:2501 tipc_node_xmit+0x23e/0xfb0 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x177/0x3c0 net/tipc/node.c:1781 tipc_sk_backlog_rcv+0x16f/0x1e0 net/tipc/socket.c:2416 sk_backlog_rcv include/net/sock.h:1190 [inline] __release_sock+0x3a2/0x440 net/core/sock.c:3261 release_sock+0x1e5/0x280 net/core/sock.c:3860 sockopt_release_sock net/core/sock.c:1163 [inline] sk_setsockopt+0x46b/0x5d80 net/core/sock.c:1681 do_sock_setsockopt+0x193/0x1d0 net/socket.c:2364 __sys_setsockopt+0x119/0x190 net/socket.c:2393 __do_sys_setsockopt net/socket.c:2399 [inline] __se_sys_setsockopt net/socket.c:2396 [inline] __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2396 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f451159de99 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:00007f45123f5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f4511826090 RCX: 00007f451159de99 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007f4511633eaf R08: 0000000000000009 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4511826128 R14: 00007f4511826090 R15: 00007ffc483352f8