rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=2684/1/0x4000000000000000 softirq=16137/16150 fqs=5250 rcu: hardirqs softirqs csw/system rcu: number: 0 0 0 rcu: cputime: 74 0 52415 ==> 52500(ms) rcu: (t=10502 jiffies g=7825 q=1601 ncpus=2) CPU: 0 UID: 0 PID: 7767 Comm: syz-executor311 Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:its_return_thunk+0x0/0x10 arch/x86/lib/retpoline.S:411 Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 e9 ab 96 bb f5 cc RSP: 0018:ffffc9000b56eae0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff88814df45138 RCX: 0000000000000001 RDX: ffff88802a190000 RSI: ffffffff84d0a0f2 RDI: ffffffff8bf4a220 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 000000008ff5e664 R15: 1ffff920016add6b FS: 00007f457a10b6c0(0000) GS:ffff8881249da000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000001c0 CR3: 0000000064f95000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lockdep_rht_mutex_is_held+0x82/0xa0 lib/rhashtable.c:49 __rhashtable_lookup include/linux/rhashtable.h:602 [inline] rhashtable_lookup include/linux/rhashtable.h:646 [inline] tipc_sk_lookup+0x65b/0x930 net/tipc/socket.c:2998 tipc_sk_rcv+0x2be/0x1bd0 net/tipc/socket.c:2490 tipc_node_xmit+0x232/0xfc0 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+0x9d9/0x1bd0 net/tipc/socket.c:2499 tipc_node_xmit+0x232/0xfc0 net/tipc/node.c:1701 tipc_sk_push_backlog+0x318/0x9e0 net/tipc/socket.c:1312 tipc_sk_filter_connect net/tipc/socket.c:2253 [inline] tipc_sk_filter_rcv+0x1397/0x3020 net/tipc/socket.c:2362 tipc_sk_enqueue net/tipc/socket.c:2443 [inline] tipc_sk_rcv+0xfed/0x1bd0 net/tipc/socket.c:2495 tipc_node_xmit+0x232/0xfc0 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:2410 sk_backlog_rcv include/net/sock.h:1132 [inline] __release_sock+0x362/0x400 net/core/sock.c:3163 release_sock+0x5a/0x220 net/core/sock.c:3717 sockopt_release_sock net/core/sock.c:1157 [inline] sk_setsockopt+0xd5f/0x3810 net/core/sock.c:1654 do_sock_setsockopt+0x3f2/0x470 net/socket.c:2292 __sys_setsockopt+0x1a0/0x230 net/socket.c:2321 __do_sys_setsockopt net/socket.c:2327 [inline] __se_sys_setsockopt net/socket.c:2324 [inline] __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2324 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f457a1523a9 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:00007f457a10b218 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f457a10b6c0 RCX: 00007f457a1523a9 RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007f457a1dc328 R08: 0000000000000004 R09: 0000000000000000 R10: 0000200000000540 R11: 0000000000000246 R12: 0000200000000200 R13: 00007f457a1dc320 R14: 00007f457a1dc32c R15: 00002000000001c4