rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P3091/1:b..l
	(detected by 0, t=10503 jiffies, g=52309, q=63 ncpus=2)
task:udevd           state:R  running task     stack:22600 pid:3091  ppid:1      flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6558
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
 irqentry_exit+0x53/0x80 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:i_user_ns include/linux/fs.h:1609 [inline]
RIP: 0010:i_uid_into_mnt include/linux/fs.h:1651 [inline]
RIP: 0010:acl_permission_check fs/namei.c:345 [inline]
RIP: 0010:generic_permission+0x75/0x4f0 fs/namei.c:407
Code: 4d 89 fd 49 c1 ed 03 41 80 7c 2d 00 00 74 08 4c 89 ff e8 ee 74 ee ff bb e8 07 00 00 49 03 1f 48 89 d8 48 c1 e8 03 80 3c 28 00 <74> 08 48 89 df e8 d1 74 ee ff 48 8b 2b 49 8d 5c 24 04 48 89 d8 48
RSP: 0018:ffffc9000316f740 EFLAGS: 00000246
RAX: 1ffff1100fb91cfd RBX: ffff88807dc8e7e8 RCX: ffff88807bf68000
RDX: 0000000000000000 RSI: ffff888029722720 RDI: ffffffff8d1d5520
RBP: dffffc0000000000 R08: ffffffff81f3aeed R09: fffff5200062df76
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888029722720
R13: 1ffff110052e44e9 R14: 00000000000041ed R15: ffff888029722748
 do_inode_permission fs/namei.c:468 [inline]
 inode_permission+0xa2/0x450 fs/namei.c:528
 may_lookup fs/namei.c:1716 [inline]
 link_path_walk+0x283/0xee0 fs/namei.c:2267
 path_openat+0x23d/0x2e60 fs/namei.c:3781
 do_filp_open+0x230/0x480 fs/namei.c:3812
 do_sys_openat2+0x13b/0x4f0 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1345
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe30a5929a4
RSP: 002b:00007fff12614370 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe30a5929a4
RDX: 0000000000080141 RSI: 000055a09bbc60d8 RDI: 00000000ffffff9c
RBP: 000055a09bbc60d8 R08: 00000000ffffffff R09: 0000000000000000
R10: 00000000000001a4 R11: 0000000000000246 R12: 0000000000080141
R13: ffffffffffffffff R14: 00000000ffffffff R15: 00000000ffffffff
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 9642 jiffies! g52309 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=32238
rcu: rcu_preempt kthread starved for 9645 jiffies! g52309 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:27064 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </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: 12841 Comm: syz.3.1733 Not tainted 6.1.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__setup_rt_frame arch/x86/kernel/signal.c:502 [inline]
RIP: 0010:setup_rt_frame arch/x86/kernel/signal.c:784 [inline]
RIP: 0010:handle_signal arch/x86/kernel/signal.c:828 [inline]
RIP: 0010:arch_do_signal_or_restart+0xc07/0x1a10 arch/x86/kernel/signal.c:873
Code: 24 88 00 00 00 74 08 4c 89 f7 e8 24 43 b2 00 49 c7 06 00 00 00 00 4c 8d b3 38 01 00 00 48 8b 84 24 a8 00 00 00 42 80 3c 28 00 <4c> 8b bc 24 c0 00 00 00 74 08 4c 89 ff e8 f7 42 b2 00 48 83 c3 08
RSP: 0018:ffffc9000486fc80 EFLAGS: 00000246
RAX: 1ffff9200090dff8 RBX: 00007f4b8e9adb38 RCX: ffff888026005940
RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffffc9000486fdf0
RBP: ffffc9000486fea8 R08: ffffffff8132dfc2 R09: fffff5200090df4a
R10: 0000000000000000 R11: dffffc0000000001 R12: 00007f4b8e9adb38
R13: dffffc0000000000 R14: 00007f4b8e9adc70 R15: ffffc9000486fde0
FS:  00007f4b8e9ae6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffee2f05e00 CR3: 00000000648c1000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4b8db79e79
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:00007f4b8e9ae0e8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f4b8dd15f88 RCX: 00007f4b8db79e79
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000011
RBP: 00007f4b8dd15f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4b8dd15f8c
R13: 0000000000000000 R14: 00007fff6d0eabe0 R15: 00007fff6d0eacc8
 </TASK>