rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=4f2c/1/0x4000000000000000 softirq=45429/45485 fqs=32
rcu: 	(t=10500 jiffies g=39725 q=1442 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10425 jiffies! g39725 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=21167
rcu: rcu_preempt kthread starved for 10426 jiffies! g39725 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
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:25624 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6765
 __schedule_loop kernel/sched/core.c:6842 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6857
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16487 Comm: syz.1.5063 Not tainted 6.14.0-rc3-syzkaller-00154-g28b04731a38c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:kvm_wait+0x250/0x2c0 arch/x86/kernel/kvm.c:1064
Code: 3b 45 0f b6 f6 44 89 ff 44 89 f6 e8 6a 56 55 00 e8 f5 22 5d 00 45 38 f7 75 15 66 90 e8 d9 55 55 00 0f 00 2d a2 a4 bb 0a fb f4 <e9> 50 fe ff ff e8 c6 55 55 00 fb e9 45 fe ff ff 89 d9 80 e1 07 38
RSP: 0018:ffffc9000bd67880 EFLAGS: 000002d3
RAX: ffffffff816c64b7 RBX: ffff88802a4edcc0 RCX: ffff888067a23c00
RDX: 0000000000000000 RSI: ffffffff8c2aa440 RDI: ffffffff8c80eec0
RBP: ffffc9000bd67950 R08: ffffffff94546967 R09: 1ffffffff28a8d2c
R10: dffffc0000000000 R11: fffffbfff28a8d2d R12: 1ffff920017acf14
R13: dffffc0000000000 R14: 0000000000000003 R15: 0000000000000003
FS:  000055555c516500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc64cd68a8 CR3: 0000000028438000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:589 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline]
 __pv_queued_spin_lock_slowpath+0x8d0/0xdb0 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:577 [inline]
 queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x272/0x370 kernel/locking/spinlock_debug.c:116
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 lock_sock_nested+0x6a/0x100 net/core/sock.c:3665
 lock_sock include/net/sock.h:1624 [inline]
 tipc_release+0xc6/0x1870 net/tipc/socket.c:637
 __sock_release net/socket.c:647 [inline]
 sock_close+0xbc/0x240 net/socket.c:1398
 __fput+0x3e9/0x9f0 fs/file_table.c:464
 task_work_run+0x24f/0x310 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb744f8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc5ee352c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fb7451a7ba0 RCX: 00007fb744f8d169
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fb7451a7ba0 R08: 0000000000000000 R09: 000000035ee355bf
R10: 00007fb7451a7ac0 R11: 0000000000000246 R12: 00000000000861ed
R13: 00007ffc5ee353c0 R14: ffffffffffffffff R15: 00007ffc5ee353e0
 </TASK>
CPU: 0 UID: 0 PID: 16492 Comm: syz.1.5063 Not tainted 6.14.0-rc3-syzkaller-00154-g28b04731a38c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5855
Code: 2b 00 74 08 4c 89 f7 e8 5a 48 8c 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc9000c30e200 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92001861c4c RCX: ffff888025caa8e8
RDX: dffffc0000000000 RSI: ffffffff8c2ab6a0 RDI: ffffffff8c80eec0
RBP: ffffc9000c30e348 R08: ffffffff94546847 R09: 1ffffffff28a8d08
R10: dffffc0000000000 R11: fffffbfff28a8d09 R12: 1ffff92001861c48
R13: dffffc0000000000 R14: ffffc9000c30e260 R15: 0000000000000246
FS:  00007fb745d5e6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb745d5df98 CR3: 0000000028438000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 tipc_sk_lookup+0xef/0x9e0 net/tipc/socket.c:2997
 tipc_sk_rcv+0x434/0x1d10 net/tipc/socket.c:2490
 tipc_node_xmit+0x1e0/0xfa0 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x30d/0x450 net/tipc/node.c:1781
 tipc_sk_rcv+0x15dc/0x1d10 net/tipc/socket.c:2499
 tipc_node_xmit+0x1e0/0xfa0 net/tipc/node.c:1701
 tipc_sk_push_backlog+0x513/0x930 net/tipc/socket.c:1312
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1366 [inline]
 tipc_sk_proto_rcv+0x9ee/0x1990 net/tipc/socket.c:2156
 tipc_sk_filter_rcv+0x36b6/0x3950 net/tipc/socket.c:2350
 tipc_sk_enqueue net/tipc/socket.c:2443 [inline]
 tipc_sk_rcv+0x8b3/0x1d10 net/tipc/socket.c:2495
 tipc_node_xmit+0x1e0/0xfa0 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x30d/0x450 net/tipc/node.c:1781
 tipc_sk_backlog_rcv+0x1a2/0x230 net/tipc/socket.c:2410
 sk_backlog_rcv include/net/sock.h:1122 [inline]
 __release_sock+0x243/0x350 net/core/sock.c:3123
 release_sock+0x61/0x1f0 net/core/sock.c:3677
 sk_setsockopt+0xd0c/0x3330
 do_sock_setsockopt+0x2fb/0x720 net/socket.c:2299
 __sys_setsockopt net/socket.c:2328 [inline]
 __do_sys_setsockopt net/socket.c:2334 [inline]
 __se_sys_setsockopt net/socket.c:2331 [inline]
 __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2331
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb744f8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb745d5e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fb7451a6080 RCX: 00007fb744f8d169
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007fb74500e2a0 R08: 0000000000000004 R09: 0000000000000000
R10: 0000400000000540 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fb7451a6080 R15: 00007ffc5ee35168
 </TASK>