watchdog: BUG: soft lockup - CPU#1 stuck for 122s! [syz.8.4702:18341] Modules linked in: CPU: 1 PID: 18341 Comm: syz.8.4702 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 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:ffffc90000db77a0 EFLAGS: 00000206 RAX: 0000000000000000 RBX: ffff88810c0fd488 RCX: ffffffff814b241a RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88810c0fd488 RBP: ffffc90000db7890 R08: dffffc0000000000 R09: ffffed102181fa92 R10: ffffed102181fa92 R11: 1ffff1102181fa91 R12: ffff8881f73d3000 R13: 1ffff1102181fa91 R14: 00000000ffff8c5f R15: dffffc0000000000 FS: 00007fe7270fd6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe7270fcf98 CR3: 0000000118052000 CR4: 00000000003506a0 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+0xd8/0xe0 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:360 [inline] lock_sock_nested+0x92/0x290 net/core/sock.c:3125 lock_sock include/net/sock.h:1684 [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: 0033:0x7fe7286d7749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe7270fd038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe72892e180 RCX: 00007fe7286d7749 RDX: 0000000000000000 RSI: 0000200000000200 RDI: 0000000000000029 RBP: 00007fe72875bf91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe72892e218 R14: 00007fe72892e180 R15: 00007ffc2cfa2368 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 18340 Comm: syz.8.4702 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:memcmp lib/string.c:942 [inline] RIP: 0010:bcmp+0x47/0xd0 lib/string.c:964 Code: 00 fc ff df 45 31 f6 4a 8d 04 37 48 89 c1 48 c1 e9 03 0f b6 0c 19 84 c9 75 2d 42 0f b6 04 37 4a 8d 0c 36 49 89 c8 49 c1 e8 03 <45> 0f b6 04 18 45 84 c0 75 3b 42 0f b6 0c 36 29 c8 75 64 49 ff c6 RSP: 0018:ffffc90000c268a0 EFLAGS: 00000a02 RAX: 00000000000000c9 RBX: dffffc0000000000 RCX: ffffc90000c26960 RDX: 0000000000000004 RSI: ffffc90000c26960 RDI: ffff88810c0fd75c RBP: ffffc90000c268d0 R08: 1ffff92000184d2c R09: 0000000000000003 R10: fffff52000184d2c R11: 1ffff92000184d2c R12: 0000000000000004 R13: ffff88810c0fd7e8 R14: 0000000000000000 R15: fffffffffffffc18 FS: 00007fe72711e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe72711df98 CR3: 0000000118052000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rhashtable_compare include/linux/rhashtable.h:577 [inline] __rhashtable_lookup include/linux/rhashtable.h:602 [inline] rhashtable_lookup include/linux/rhashtable.h:638 [inline] tipc_sk_lookup+0x2f3/0x5f0 net/tipc/socket.c:2997 tipc_sk_rcv+0x3eb/0x1ef0 net/tipc/socket.c:2488 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 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:1058 [inline] __release_sock+0x146/0x360 net/core/sock.c:2589 release_sock net/core/sock.c:3142 [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: 0033:0x7fe7286d7749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe72711e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fe72892e090 RCX: 00007fe7286d7749 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000028 RBP: 00007fe72875bf91 R08: 0000000000000004 R09: 0000000000000000 R10: 0000200000000540 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe72892e128 R14: 00007fe72892e090 R15: 00007ffc2cfa2368