rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10504 jiffies, g=68289, q=122)
rcu: All QSes seen, last rcu_preempt kthread activity 10504 (4295058489-4295047985), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g68289 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:26816 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
 schedule+0x11b/0x1f0 kernel/sched/core.c:6456
 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:287
 </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 PID: 17769 Comm: syz.9.2625 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:rb_link_node include/linux/rbtree.h:63 [inline]
RIP: 0010:rb_add_cached include/linux/rbtree.h:182 [inline]
RIP: 0010:timerqueue_add+0x1f2/0x280 lib/timerqueue.c:40
Code: ce 91 fd 4c 8b 7c 24 10 4e 89 7c 35 00 45 84 e4 75 40 e8 31 f5 47 fd 31 db 4c 8b 64 24 08 eb 69 e8 23 f5 47 fd ba 18 00 00 00 <4c> 89 ff 31 f6 e8 04 cf 91 fd 48 b8 00 00 00 00 00 fc ff df 80 3c
RSP: 0018:ffffc90000dd0cc0 EFLAGS: 00000006
RAX: ffffffff84387e7d RBX: 1ffff110171e546a RCX: ffff888026601dc0
RDX: 0000000000000018 RSI: ffff888063251b40 RDI: ffff888063251b40
RBP: 1ffff1100c64a368 R08: ffffffff84387cd7 R09: fffffbfff1c14b16
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880b8f2a350
R13: ffff8880b8f2a350 R14: 0000000000000000 R15: ffff888063251b40
FS:  00007f125706f6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f125704df98 CR3: 000000005f54f000 CR4: 00000000003506e0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 enqueue_hrtimer+0x1a0/0x390 kernel/time/hrtimer.c:1092
 __run_hrtimer kernel/time/hrtimer.c:1705 [inline]
 __hrtimer_run_queues+0x6b6/0xcf0 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:finish_lock_switch+0x91/0x100 kernel/sched/core.c:4782
Code: 45 31 c9 68 f7 aa 59 81 e8 9c 11 09 00 48 83 c4 08 4c 89 ff e8 50 db fe ff 66 90 4c 89 ff e8 06 91 ee 08 e8 c1 46 2d 00 fb 5b <41> 5c 41 5d 41 5e 41 5f c3 44 89 f1 80 e1 07 80 c1 03 38 c1 7c 87
RSP: 0018:ffffc9000312f298 EFLAGS: 00000286
RAX: 318e0adb387d5800 RBX: ffff88805f043bb4 RCX: ffffffff96a8ef03
RDX: dffffc0000000000 RSI: ffffffff8aab2a80 RDI: ffffffff8af9ed00
RBP: ffffc9000312f310 R08: ffffffff8186f220 R09: ffffed10171e7461
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff110171e760b R14: ffff8880b8f3b058 R15: ffff8880b8f3a300
 finish_task_switch+0x134/0x630 kernel/sched/core.c:4899
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12cc/0x45b0 kernel/sched/core.c:6373
 schedule+0x11b/0x1f0 kernel/sched/core.c:6456
 schedule_timeout+0xac/0x300 kernel/time/timer.c:1890
 unix_wait_for_peer+0x24b/0x330 net/unix/af_unix.c:1304
 unix_dgram_sendmsg+0x1441/0x2090 net/unix/af_unix.c:1899
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2436
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2490
 __sys_sendmmsg+0x2bf/0x560 net/socket.c:2576
 __do_sys_sendmmsg net/socket.c:2605 [inline]
 __se_sys_sendmmsg net/socket.c:2602 [inline]
 __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2602
 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: 0033:0x7f12591fed19
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:00007f125706f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f12593eefa0 RCX: 00007f12591fed19
RDX: 0000000000000651 RSI: 0000000020000000 RDI: 0000000000000006
RBP: 00007f125927aa20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f12593eefa0 R15: 00007ffe51dce2b8
 </TASK>