rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (12 ticks this GP) idle=e69/1/0x4000000000000002 softirq=24475/24476 fqs=5246 
	(detected by 1, t=10502 jiffies, g=29841, q=1100)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10327 Comm: syz.0.1559 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:unwind_next_frame+0x142/0x1d90 arch/x86/kernel/unwind_orc.c:448
Code: 00 00 fc ff df 48 89 44 24 68 42 0f b6 04 28 84 c0 0f 85 3f 16 00 00 4c 89 74 24 70 45 0f b6 36 48 8b 44 24 20 42 80 3c 28 00 <4c> 8b 7c 24 18 74 08 4c 89 ff e8 0f 37 89 00 49 8b 2f 49 83 f6 01
RSP: 0018:ffffc9000342ea60 EFLAGS: 00000046
RAX: 1ffff92000685d79 RBX: ffffc9000342eb80 RCX: ffffffff962dcf03
RDX: 000000000000000b RSI: 000000000000007f RDI: 0000000000000001
RBP: ffffc9000342ebc8 R08: ffffc9000342ebdf R09: ffffc9000342ebd0
R10: dffffc0000000000 R11: fffff52000685d7c R12: ffffffff81532c1f
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc9000342ebd0
FS:  00007fd4985ec6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000010200000000 CR3: 000000004733d000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 perf_callchain_kernel+0x449/0x720 arch/x86/events/core.c:2783
 get_perf_callchain+0x356/0x460 kernel/events/callchain.c:200
 perf_callchain kernel/events/core.c:7606 [inline]
 perf_prepare_sample+0x352/0x1cd0 kernel/events/core.c:7633
 __perf_event_output kernel/events/core.c:7802 [inline]
 perf_event_output_forward+0x185/0x2e0 kernel/events/core.c:7822
 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515
 perf_tp_event+0x383/0xbf0 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 d2 df 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc9000342f480 EFLAGS: 00000206
RAX: 5e1f21e606138200 RBX: 1ffff92000685e94 RCX: 5e1f21e606138200
RDX: dffffc0000000000 RSI: ffffffff8a2b3100 RDI: ffffffff8a7a0700
RBP: ffffc9000342f550 R08: ffff8880b903b30b R09: 1ffff11017207661
R10: dffffc0000000000 R11: ffffed1017207662 R12: ffffffff8c323800
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 get_mem_cgroup_from_objcg+0x109/0x120 mm/memcontrol.c:2817
 obj_cgroup_uncharge_pages mm/memcontrol.c:2992 [inline]
 __memcg_kmem_uncharge_page+0x74/0x140 mm/memcontrol.c:3083
 memcg_kmem_uncharge_page include/linux/memcontrol.h:1703 [inline]
 free_thread_stack+0x96/0x430 kernel/fork.c:283
 release_task_stack kernel/fork.c:433 [inline]
 put_task_stack+0x97/0x140 kernel/fork.c:444
 finish_task_switch+0x26f/0x640 kernel/sched/core.c:4961
 context_switch kernel/sched/core.c:5052 [inline]
 __schedule+0x11f7/0x43c0 kernel/sched/core.c:6395
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__validate_process_creds+0x1f3/0x3f0 kernel/cred.c:889
Code: 04 00 00 00 e8 fe 4d 6d 00 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 ba 01 00 00 41 8b 6d 00 <bf> 02 00 00 00 89 ee e8 d1 30 28 00 83 fd 01 7e 7b 48 bd 00 00 00
RSP: 0018:ffffc9000342fa10 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88801d4461f0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888062d56788
RBP: 0000000000000006 R08: ffff888062d5678b R09: 1ffff1100c5aacf1
R10: dffffc0000000000 R11: ffffed100c5aacf2 R12: ffff88801d4461e8
R13: ffff888062d56788 R14: 1ffff11003a88c3e R15: 1ffff11003a88c3d
 do_exit+0x1db/0x20c0 kernel/exit.c:817
 do_group_exit+0x12e/0x300 kernel/exit.c:998
 get_signal+0x6d6/0x12d0 kernel/signal.c:2900
 arch_do_signal_or_restart+0xe7/0x12c0 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd49a392e59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd4985ec028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007fd49a60bfa0 RCX: 00007fd49a392e59
RDX: 0000200000000080 RSI: 00000000400454ca RDI: 0000000000000007
RBP: 00007fd49a428d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd49a60c038 R14: 00007fd49a60bfa0 R15: 00007ffc5a22b938
 </TASK>