INFO: rcu detected stall in tipc_conn_send

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision
1b0cd2f6	assessment-security	DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ✅ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	INFO: rcu detected stall in tipc_conn_send_work (2)	2026/07/24 00:06	2026/07/24 00:06	2026/07/24 00:21	71a13572

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: rcu detected stall in tipc_conn_send_work tipc prio:high	1				1	190d	190d	0/29	auto-obsoleted due to no activity on 2026/06/18 13:16

Kernel

Title

Rank 🛈

upstream

INFO: rcu detected stall in tipc_conn_send_work tipc prio:high

190d

0/29

auto-obsoleted due to no activity on 2026/06/18 13:16

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P145/2:b..l rcu: (detected by 0, t=10502 jiffies, g=17129, q=12121 ncpus=2) task:kworker/u8:5 state:R running task stack:20912 pid:145 tgid:145 ppid:2 task_flags:0x4208060 flags:0x00080000 Workqueue: tipc_send tipc_conn_send_work Call Trace: <TASK> context_switch kernel/sched/core.c:5510 [inline] __schedule+0x1709/0x5530 kernel/sched/core.c:7231 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7553 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:tipc_sk_enqueue net/tipc/socket.c:-1 [inline] RIP: 0010:tipc_sk_rcv+0x13f2/0x2c90 net/tipc/socket.c:2501 Code: 74 10 08 44 24 37 74 0a e8 7b f0 d6 f6 e9 c3 fb ff ff e8 71 f0 d6 f6 49 bf 00 00 00 00 00 fc ff df 4c 8b 6c 24 20 8b 5c 24 18 <48> 8b 84 24 c8 00 00 00 42 0f b6 04 38 84 c0 48 8b 54 24 38 0f 85 RSP: 0018:ffffc9000416f5c0 EFLAGS: 00000246 RAX: aa70e0e2ef070b00 RBX: 0000000085989774 RCX: f8f8f8f8f8f8f8f8 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000416f8f0 R08: ffffffff8fd0c47f R09: 1ffffffff1fa188f R10: dffffc0000000000 R11: fffffbfff1fa1890 R12: ffffc9000416f980 R13: ffffc9000416f980 R14: 0000000000000000 R15: dffffc0000000000 tipc_topsrv_kern_evt net/tipc/topsrv.c:630 [inline] tipc_conn_send_to_sock net/tipc/topsrv.c:286 [inline] tipc_conn_send_work+0x6cd/0xa50 net/tipc/topsrv.c:306 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379 process_scheduled_works kernel/workqueue.c:3462 [inline] worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK>

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/07/22 22:53	linux-next	cc2b5f627e8c	881ce5c2	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-rust-kasan-gce	INFO: rcu detected stall in tipc_conn_send_work

Crashes (1):

Assets (help?)