rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12744/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=59137, q=291 ncpus=2)
task:syz-executor.0 state:R running task stack:20016 pid:12744 tgid:12744 ppid:12729 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6925
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6949
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:12
vprintk_emit+0x690/0x770 kernel/printk/printk.c:2349
dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4950
dev_printk_emit+0xdd/0x120 drivers/base/core.c:4961
__netdev_printk+0x3e0/0x4d0 net/core/dev.c:11505
netdev_info+0x122/0x170 net/core/dev.c:11560
nsim_udp_tunnel_set_port+0x2af/0x460 drivers/net/netdevsim/udp_tunnels.c:34
udp_tunnel_nic_device_sync_by_port net/ipv4/udp_tunnel_nic.c:246 [inline]
__udp_tunnel_nic_device_sync+0xa1f/0x1380 net/ipv4/udp_tunnel_nic.c:289
udp_tunnel_nic_device_sync net/ipv4/udp_tunnel_nic.c:312 [inline]
__udp_tunnel_nic_add_port+0xc15/0xee0 net/ipv4/udp_tunnel_nic.c:531
udp_tunnel_nic_add_port include/net/udp_tunnel.h:350 [inline]
udp_tunnel_notify_add_rx_port+0x30a/0x4d0 net/ipv4/udp_tunnel_core.c:127
geneve_socket_create drivers/net/geneve.c:606 [inline]
geneve_sock_add+0x647/0xbc0 drivers/net/geneve.c:681
geneve_open+0xe3/0x160 drivers/net/geneve.c:723
__dev_open+0x2d3/0x450 net/core/dev.c:1430
__dev_change_flags+0x1e2/0x6f0 net/core/dev.c:8692
dev_change_flags+0x8b/0x1a0 net/core/dev.c:8764
do_setlink+0xccd/0x41f0 net/core/rtnetlink.c:2884
__rtnl_newlink net/core/rtnetlink.c:3680 [inline]
rtnl_newlink+0x180b/0x20a0 net/core/rtnetlink.c:3727
rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2559
netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
__sys_sendto+0x3a4/0x4f0 net/socket.c:2191
__do_sys_sendto net/socket.c:2203 [inline]
__se_sys_sendto net/socket.c:2199 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2199
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbc6107fb9c
RSP: 002b:00007ffd70fc8840 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fbc61cd4620 RCX: 00007fbc6107fb9c
RDX: 000000000000002c RSI: 00007fbc61cd4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd70fc8894 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fbc61cd4670 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10565 jiffies! g59137 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:24496 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
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: 12909 Comm: syz-executor.3 Not tainted 6.9.0-rc5-syzkaller-00031-g71b1543c83d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:kick_process+0x101/0x160 kernel/sched/core.c:3532
Code: 8b 1d 8b fd b2 0c 44 89 f7 41 ff d3 66 90 bf 01 00 00 00 e8 b1 68 ff ff 65 8b 05 d2 95 9d 7e 85 c0 74 0d 5b 41 5c 41 5e 41 5f <5d> c3 cc cc cc cc e8 e4 74 9a ff eb ec 89 e9 80 e1 07 80 c1 03 38
RSP: 0018:ffffc90000007b10 EFLAGS: 00000086
RAX: 0000000080010003 RBX: 0000000000000021 RCX: 0000000000010004
RDX: 0000000080010003 RSI: ffffffff8c1eb2c0 RDI: 0000000000000001
RBP: ffff88802ac10014 R08: ffffffff815c35bf R09: 1ffff11005582000
R10: dffffc0000000000 R11: ffffed1005582001 R12: ffff88802ac10000
R13: ffff88802ac10000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f46f10b26c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f87fced56c6 CR3: 000000005ca80000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
signal_wake_up include/linux/sched/signal.h:448 [inline]
complete_signal+0x94a/0xcf0 kernel/signal.c:1065
send_sigqueue+0x54c/0x760 kernel/signal.c:2022
posix_timer_event kernel/time/posix-timers.c:298 [inline]
posix_timer_fn+0x18a/0x3a0 kernel/time/posix-timers.c:324
__run_hrtimer kernel/time/hrtimer.c:1692 [inline]
__hrtimer_run_queues+0x5a5/0xd50 kernel/time/hrtimer.c:1756
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 fa db f0 f5 48 89 df e8 12 1c f2 f5 e8 ed 78 1b f6 fb bf 01 00 00 00 d2 e1 e3 f5 65 8b 05 f3 0e 82 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc9000bf97c70 EFLAGS: 00000282
RAX: c87eb04adbc8bd00 RBX: ffff88801fca1bc0 RCX: ffffffff946f3603
RDX: dffffc0000000000 RSI: ffffffff8bcab8a0 RDI: 0000000000000001
RBP: ffffc9000bf97db0 R08: ffffffff8fa7b66f R09: 1ffffffff1f4f6cd
R10: dffffc0000000000 R11: fffffbfff1f4f6ce R12: 0000000000000021
R13: 1ffff11003f9440b R14: ffff88801fca2058 R15: ffff88801fca1bc0
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x14dd/0x1740 kernel/signal.c:2914
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f46f027dea7
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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
RSP: 002b:00007f46f10b2178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f46f03abf88 RCX: 00007f46f027dea9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f46f03abf88
RBP: 00007f46f03abf80 R08: 00007f46f10b26c0 R09: 00007f46f10b26c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f46f03abf8c
R13: 000000000000000b R14: 00007fffe13ae380 R15: 00007fffe13ae468
sched: RT throttling activated