rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10503 ticks this GP) idle=d914/1/0x4000000000000000 softirq=12716/12717 fqs=5185 rcu: hardirqs softirqs csw/system rcu: number: 5437 0 0 rcu: cputime: 262 0 52198 ==> 52490(ms) rcu: (t=10500 jiffies g=10525 q=1522 ncpus=2) CPU: 1 UID: 0 PID: 5820 Comm: syz-executor172 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216 Code: 8b 3d 04 c2 54 0c 48 89 de 5b e9 b3 3a 5e 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d 28 c2 55 11 65 8b 15 49 c2 55 11 81 e2 00 01 ff 00 74 RSP: 0018:ffffc9000417e458 EFLAGS: 00000202 RAX: ffffffff8b4acc38 RBX: 0000000000000001 RCX: 0000000000000202 RDX: ffff888076183c80 RSI: ffffffff8c2773e0 RDI: ffffffff8c2773a0 RBP: ffffc9000417e550 R08: ffffffff8b4acbf5 R09: ffffffff8e760320 R10: dffffc0000000000 R11: fffffbfff20227d7 R12: ffffc9000417ea80 R13: dffffc0000000000 R14: ffffffff8b4acbf5 R15: ffff8880329a0000 FS: 00007f9d2b00a6c0(0000) GS:ffff88812556a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9d2afe9d58 CR3: 0000000074baa000 CR4: 00000000003526f0 Call Trace: rcu_read_lock include/linux/rcupdate.h:851 [inline] tipc_sk_lookup+0xf8/0x920 net/tipc/socket.c:2997 tipc_sk_rcv+0x409/0x2bc0 net/tipc/socket.c:2490 tipc_node_xmit+0x202/0xf10 net/tipc/node.c:1701 tipc_node_xmit_skb+0x11e/0x190 net/tipc/node.c:1766 tipc_sk_rcv+0x299a/0x2bc0 net/tipc/socket.c:2520 tipc_node_xmit+0x202/0xf10 net/tipc/node.c:1701 tipc_sk_push_backlog net/tipc/socket.c:1312 [inline] tipc_sk_filter_connect net/tipc/socket.c:2253 [inline] tipc_sk_filter_rcv+0x1d3d/0x3320 net/tipc/socket.c:2362 tipc_sk_enqueue net/tipc/socket.c:2443 [inline] tipc_sk_rcv+0x8d5/0x2bc0 net/tipc/socket.c:2495 tipc_node_xmit+0x202/0xf10 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x2d8/0x400 net/tipc/node.c:1781 tipc_sk_backlog_rcv+0x1bb/0x270 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1185 [inline] __release_sock+0x297/0x3a0 net/core/sock.c:3213 release_sock+0x5f/0x1f0 net/core/sock.c:3795 tipc_release+0x1ad1/0x25b0 net/tipc/socket.c:650 __sock_release+0xb9/0x250 net/socket.c:666 sock_close+0x1c/0x30 net/socket.c:1470 __fput+0x44f/0xa70 fs/file_table.c:469 task_work_run+0x1d9/0x270 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline] do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9d2b0325a9 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:00007f9d2b00a218 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000203a0 RBX: 00007f9d2b0e4b48 RCX: 00007f9d2b0325a9 RDX: 0000000000000000 RSI: 00002000000003c0 RDI: 0000000000000003 RBP: 00007f9d2b0e4b40 R08: 35203a6b63617473 R09: 35203a6b63617473 R10: 00002000000003c0 R11: 0000000000000246 R12: 00007f9d2b0b5818 R13: 00002000000075c0 R14: 0000200000000d10 R15: 0000200000000c40