watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [syz.9.1038:4622]
Modules linked in:
CPU: 0 PID: 4622 Comm: syz.9.1038 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:970 [inline]
RIP: 0010:bcmp+0x18c/0x230 lib/string.c:991
Code: 48 89 c7 49 89 d5 e8 63 19 3a ff 48 8b 7d c8 48 8b 75 d0 4c 89 ea e9 05 ff ff ff 48 85 d2 0f 84 99 00 00 00 31 db 48 8d 04 1f <48> 89 c1 48 c1 e9 03 42 0f b6 0c 39 84 c9 75 2b 0f b6 04 1f 48 8d
RSP: 0018:ffffc90000db6898 EFLAGS: 00000246
RAX: ffff8881263f6b70 RBX: 0000000000000000 RCX: ffff8881158c3b40
RDX: 0000000000000004 RSI: ffffc90000db6960 RDI: ffff8881263f6b70
RBP: ffffc90000db68d0 R08: 0000000000000004 R09: 0000000000000003
R10: fffff520001b6d2c R11: 1ffff920001b6d2c R12: 0000000000000004
R13: ffff8881263f6bf8 R14: 00000000a3a203d2 R15: dffffc0000000000
FS:  00007f1a603426c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000116118000 CR4: 00000000003526b0
DR0: 0000000000000001 DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 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:2999
 tipc_sk_rcv+0x3fe/0x2c60 net/tipc/socket.c:2492
 tipc_node_xmit+0x256/0xce0 net/tipc/node.c:1703
 tipc_node_xmit_skb+0xe9/0x130 net/tipc/node.c:1768
 tipc_sk_rcv+0x1d5d/0x2c60 net/tipc/socket.c:2522
 tipc_node_xmit+0x256/0xce0 net/tipc/node.c:1703
 tipc_sk_push_backlog net/tipc/socket.c:1316 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2255 [inline]
 tipc_sk_filter_rcv+0x151b/0x2c40 net/tipc/socket.c:2364
 tipc_sk_enqueue net/tipc/socket.c:2445 [inline]
 tipc_sk_rcv+0x7b7/0x2c60 net/tipc/socket.c:2497
 tipc_node_xmit+0x256/0xce0 net/tipc/node.c:1703
 tipc_node_xmit_skb net/tipc/node.c:1768 [inline]
 tipc_node_distr_xmit+0x292/0x390 net/tipc/node.c:1783
 tipc_sk_backlog_rcv+0x16f/0x1f0 net/tipc/socket.c:2412
 sk_backlog_rcv include/net/sock.h:1077 [inline]
 __release_sock+0x143/0x350 net/core/sock.c:2736
 release_sock+0x60/0x1b0 net/core/sock.c:3287
 tipc_release+0xd0b/0x1630 net/tipc/socket.c:652
 __sock_release net/socket.c:649 [inline]
 sock_close+0xe0/0x270 net/socket.c:1336
 __fput+0x20b/0x8b0 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1a618da749
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:00007f1a60342038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 00000000000203a0 RBX: 00007f1a61b30fa0 RCX: 00007f1a618da749
RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003
RBP: 00007f1a6195ef91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1a61b31038 R14: 00007f1a61b30fa0 R15: 00007ffdfaf5de08
 </TASK>
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:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at default_idle+0xf/0x20 arch/x86/kernel/process.c:729