rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2635 jiffies s: 477 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 13215 Comm: syz-executor177 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:__lock_acquire+0x2795/0x7ea0 kernel/locking/lockdep.c:5202
Code: 44 00 10 00 00 00 00 42 c7 44 00 18 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 84 24 00 02 00 00 0f 85 12 4b 00 00 44 89 e8 <48> 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 83 fb 03 bf 02 00 00
RSP: 0018:ffffc9000e4461a0 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffff88807a0428d8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff91934240
RBP: ffffc9000e4463e8 R08: dffffc0000000000 R09: 1ffffffff2326848
R10: dffffc0000000000 R11: fffffbfff2326849 R12: 790e92dfeff162c2
R13: 0000000000000001 R14: 00000000eff162c2 R15: ffff88807a042950
FS:  00007fc5c44ab6c0(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc5c451cc60 CR3: 00000000797a4000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x1bc/0x4a0 kernel/locking/lockdep.c:5790
 rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 rcu_read_lock include/linux/rcupdate.h:791 [inline]
 tipc_sk_lookup+0xd6/0x920 net/tipc/socket.c:3006
 tipc_sk_rcv+0x408/0x2bc0 net/tipc/socket.c:2498
 tipc_node_xmit+0x22e/0xfc0 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x2c7/0x3f0 net/tipc/node.c:1788
 tipc_sk_rcv+0x2643/0x2bc0 net/tipc/socket.c:2507
 tipc_node_xmit+0x22e/0xfc0 net/tipc/node.c:1708
 tipc_sk_push_backlog net/tipc/socket.c:1317 [inline]
 tipc_sk_filter_connect net/tipc/socket.c:2261 [inline]
 tipc_sk_filter_rcv+0x1b69/0x3250 net/tipc/socket.c:2370
 tipc_sk_enqueue net/tipc/socket.c:2451 [inline]
 tipc_sk_rcv+0x8cc/0x2bc0 net/tipc/socket.c:2503
 tipc_node_xmit+0x22e/0xfc0 net/tipc/node.c:1708
 tipc_node_xmit_skb net/tipc/node.c:1773 [inline]
 tipc_node_distr_xmit+0x2c7/0x3f0 net/tipc/node.c:1788
 tipc_sk_backlog_rcv+0x1aa/0x260 net/tipc/socket.c:2418
 sk_backlog_rcv include/net/sock.h:1138 [inline]
 __release_sock+0x1e6/0x460 net/core/sock.c:2953
 release_sock+0x5b/0x1b0 net/core/sock.c:3519
 sockopt_release_sock net/core/sock.c:1064 [inline]
 sk_setsockopt+0x224b/0x29a0 net/core/sock.c:1547
 __sys_setsockopt+0x2f6/0x3d0 net/socket.c:2284
 __do_sys_setsockopt net/socket.c:2299 [inline]
 __se_sys_setsockopt net/socket.c:2296 [inline]
 __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2296
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc5c44cb059
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc5c44ab218 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fc5c44abcdc RCX: 00007fc5c44cb059
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007fc5c457bb48 R08: 0000000000000004 R09: 31203a6b63617473
R10: 0000200000000180 R11: 0000000000000246 R12: 00002000000001c0
R13: 00007fc5c457bb40 R14: 00007fc5c457bb4c R15: 0000200000000044
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.411 msecs