INFO: rcu detected stall in tcp

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-5.15	INFO: rcu detected stall in tcp_setsockopt (2)	1				2	233d	244d	0/3	auto-obsoleted due to no activity on 2026/02/13 03:22
upstream	INFO: rcu detected stall in tcp_setsockopt netfilter	1	syz	error	error	4	451d	1032d	0/29	auto-obsoleted due to no activity on 2025/07/30 15:19
linux-5.15	INFO: rcu detected stall in tcp_setsockopt (3)	1				2	11d	31d	0/3	upstream: reported on 2026/05/25 18:14
android-49	INFO: rcu detected stall in tcp_setsockopt	1				2	2624d	2630d	0/3	auto-closed as invalid on 2019/10/17 00:42
android-5-15	BUG: soft lockup in tcp_setsockopt	1				1	784d	784d	0/2	auto-obsoleted due to no activity on 2024/08/01 04:54

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2963/1:b..l (detected by 1, t=10502 jiffies, g=20065, q=259) task:udevd state:R running task stack:22624 pid: 2963 ppid: 1 flags:0x00004002 Call Trace: <TASK> context_switch kernel/sched/core.c:5030 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6552 preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6577 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] _raw_spin_unlock_irqrestore+0x128/0x130 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:418 [inline] __wake_up_common_lock kernel/sched/wait.c:140 [inline] __wake_up_sync_key+0x121/0x1c0 kernel/sched/wait.c:205 sock_def_readable+0x135/0x240 net/core/sock.c:3092 __netlink_sendskb net/netlink/af_netlink.c:1277 [inline] netlink_sendskb+0x8e/0x120 net/netlink/af_netlink.c:1283 netlink_unicast+0x3a1/0x980 net/netlink/af_netlink.c:1371 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1924 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2431 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2485 __sys_sendmsg net/socket.c:2514 [inline] __do_sys_sendmsg net/socket.c:2523 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2521 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fe352bf8a4b RSP: 002b:00007ffeccc9f6b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000055af5d537df0 RCX: 00007fe352bf8a4b RDX: 0000000000000000 RSI: 00007ffeccc9f6c8 RDI: 0000000000000004 RBP: 000055af5d609830 R08: 0000000000000001 R09: d06d4a07f562ed3a R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000000000 R13: 00000000000000af R14: 0000000000000000 R15: 0000000000000000 </TASK> rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g20065 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=0 timer-softirq=7334 rcu: rcu_preempt kthread starved for 10502 jiffies! g20065 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:I stack:27064 pid: 15 ppid: 2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5030 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376 schedule+0x11b/0x1f0 kernel/sched/core.c:6459 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300 </TASK> rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5429 Comm: syz-executor Not tainted 5.15.161-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:__lock_is_held kernel/locking/lockdep.c:5363 [inline] RIP: 0010:lock_is_held_type+0x7d/0x180 kernel/locking/lockdep.c:5666 Code: 41 89 f6 49 89 ff 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 24 24 fa 48 c7 c7 00 38 8b 8a e8 0a 12 00 00 65 ff 05 c3 38 e4 75 <41> 83 bd e8 0a 00 00 00 7e 47 4c 89 ed 48 81 c5 f0 0a 00 00 31 db RSP: 0018:ffffc90000007c78 EFLAGS: 00000002 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff888017cdd940 RDX: ffff888017cdd940 RSI: ffffffff8a8b3800 RDI: ffffffff8ad8f740 RBP: 00000000ffffffff R08: ffffffff886c6a7e R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000046 R13: ffff888017cdd940 R14: 00000000ffffffff R15: ffff88801e6afb00 FS: 0000555556add500(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0e78680d38 CR3: 000000005c50b000 CR4: 00000000003506f0 Call Trace: <NMI> </NMI> <IRQ> lock_is_held include/linux/lockdep.h:287 [inline] advance_sched+0xd0/0x940 net/sched/sch_taprio.c:719 __run_hrtimer kernel/time/hrtimer.c:1686 [inline] __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1750 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:filter_irq_stacks+0x2a/0xa0 kernel/stacktrace.c:397 Code: 55 41 57 41 56 41 55 41 54 53 85 f6 74 72 49 89 fe 41 89 f4 45 31 ff 48 c7 c5 e0 01 40 8a 49 c7 c5 00 00 60 8a 48 89 fb eb 0c <49> ff c7 48 83 c3 08 4d 39 fc 74 4f 48 89 d8 48 c1 e8 03 48 b9 00 RSP: 0018:ffffc90003116c38 EFLAGS: 00000287 RAX: ffffffff882ca7ee RBX: ffffc90003116cd0 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000010 RDI: ffffc90003116c70 RBP: ffffffff8a4001e0 R08: dffffc0000000000 R09: fffffbfff1bc8d86 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000010 R13: ffffffff8a600000 R14: ffffc90003116c70 R15: 000000000000000c kasan_save_stack mm/kasan/common.c:39 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x98/0xc0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x53/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] kmem_cache_alloc_node+0x121/0x2c0 mm/slub.c:3256 alloc_vmap_area+0x1ba/0x19a0 mm/vmalloc.c:1531 __get_vm_area_node+0x16e/0x2f0 mm/vmalloc.c:2423 __vmalloc_node_range+0xe3/0x8c0 mm/vmalloc.c:3019 __vmalloc_node mm/vmalloc.c:3079 [inline] vzalloc+0x75/0x80 mm/vmalloc.c:3149 __do_replace+0xc4/0xae0 net/ipv6/netfilter/ip6_tables.c:1065 do_replace net/ipv6/netfilter/ip6_tables.c:1160 [inline] do_ip6t_set_ctl+0xe9a/0x1220 net/ipv6/netfilter/ip6_tables.c:1646 nf_setsockopt+0x28a/0x2b0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x2f9a/0x43a0 net/ipv6/ipv6_sockglue.c:1011 tcp_setsockopt+0x23f/0x3680 net/ipv4/tcp.c:3707 __sys_setsockopt+0x57e/0x990 net/socket.c:2198 __do_sys_setsockopt net/socket.c:2209 [inline] __se_sys_setsockopt net/socket.c:2206 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2206 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f0e7852891a Code: ff ff ff c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 a8 ff ff ff f7 RSP: 002b:00007ffca209c668 EFLAGS: 00000206 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffca209c6f0 RCX: 00007f0e7852891a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00000000000003b8 R09: 0079746972756365 R10: 00007f0e78680ce0 R11: 0000000000000206 R12: 00007f0e78680c80 R13: 00007ffca209c68c R14: 0000000000000000 R15: 00007f0e78682e40 </TASK>

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2024/06/27 09:04	linux-5.15.y	4878aadf2d15	6ef39602	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-5-15-kasan	INFO: rcu detected stall in tcp_setsockopt

Crashes (1):

Assets (help?)