rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=ba4c/1/0x4000000000000000 softirq=10398/10399 fqs=5247 rcu: hardirqs softirqs csw/system rcu: number: 5261 0 0 rcu: cputime: 200 0 52253 ==> 52510(ms) rcu: (t=10502 jiffies g=9785 q=209 ncpus=2) CPU: 0 PID: 5792 Comm: syz-executor657 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:lock_acquire+0x1f2/0x410 kernel/locking/lockdep.c:5758 Code: 00 9c 8f 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 0f 85 f5 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 66 43 c7 44 3c 09 00 00 43 c6 44 3c 0b 00 RSP: 0018:ffffc900044fe360 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 705cae5b7129e500 RDX: 0000000000000000 RSI: ffffffff8aaacee0 RDI: ffffffff8afc6a80 RBP: ffffc900044fe478 R08: dffffc0000000000 R09: 1ffffffff21b50a0 R10: dffffc0000000000 R11: fffffbfff21b50a1 R12: 1ffff9200089fc78 R13: ffffffff8cd2ff20 R14: 0000000000000246 R15: dffffc0000000000 FS: 00007f23785636c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2378542d58 CR3: 0000000021a54000 CR4: 00000000003506f0 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] rcu_read_lock include/linux/rcupdate.h:786 [inline] net_generic+0x3a/0x240 include/net/netns/generic.h:45 tipc_sk_lookup+0xaa/0x910 net/tipc/socket.c:3000 tipc_sk_rcv+0x3fa/0x2b80 net/tipc/socket.c:2495 tipc_node_xmit+0x1e4/0xee0 net/tipc/node.c:1703 tipc_node_xmit_skb+0xf5/0x140 net/tipc/node.c:1768 tipc_sk_rcv+0x29a9/0x2b80 net/tipc/socket.c:2525 tipc_node_xmit+0x1e4/0xee0 net/tipc/node.c:1703 tipc_sk_push_backlog net/tipc/socket.c:1317 [inline] tipc_sk_filter_connect net/tipc/socket.c:2258 [inline] tipc_sk_filter_rcv+0x1280/0x3030 net/tipc/socket.c:2367 tipc_sk_enqueue net/tipc/socket.c:2448 [inline] tipc_sk_rcv+0x8a6/0x2b80 net/tipc/socket.c:2500 tipc_node_xmit+0x1e4/0xee0 net/tipc/node.c:1703 tipc_node_xmit_skb net/tipc/node.c:1768 [inline] tipc_node_distr_xmit+0x29e/0x3b0 net/tipc/node.c:1783 tipc_sk_backlog_rcv+0x1a2/0x230 net/tipc/socket.c:2415 sk_backlog_rcv include/net/sock.h:1129 [inline] __release_sock+0x1bd/0x430 net/core/sock.c:3010 release_sock+0x5f/0x1c0 net/core/sock.c:3547 tipc_release+0x16e8/0x2140 net/tipc/socket.c:653 __sock_release net/socket.c:659 [inline] sock_close+0xbd/0x230 net/socket.c:1421 __fput+0x234/0x970 fs/file_table.c:384 task_work_run+0x1ce/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f23785a2969 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:00007f2378563218 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007f237862e328 RCX: 00007f23785a2969 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003 RBP: 00007f237862e320 R08: 0000000000000000 R09: 0000000000000000 R10: 00002000000003c0 R11: 0000000000000246 R12: 00007f23785fb518 R13: 00002000000075c0 R14: 0000200000000d10 R15: 0000200000000c40