rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=94f/1/0x4000000000000002 softirq=45161/45162 fqs=5250 
	(detected by 1, t=10502 jiffies, g=63081, q=574)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 18336 Comm: syz.3.4584 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:rcu_read_lock_held_common kernel/rcu/update.c:104 [inline]
RIP: 0010:rcu_read_lock_held+0x1/0x40 kernel/rcu/update.c:309
Code: 8f e8 63 5f 5a 00 eb cf 90 0f b6 05 55 1c 09 0d c3 0f 1f 84 00 00 00 00 00 e8 ab df 00 00 e9 86 e1 00 00 66 0f 1f 44 00 00 53 <e8> 9a 7a 65 08 85 c0 74 26 31 db e8 7f b2 00 00 84 c0 74 20 e8 d6
RSP: 0018:ffffc9000358ee68 EFLAGS: 00000002
RAX: ffffffff81010fdd RBX: ffff8880b8e35120 RCX: ffff8880290a5940
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffc9000358f017 R09: ffffc9000358efe0
R10: dffffc0000000000 R11: fffff520006b1e03 R12: dffffc0000000000
R13: ffffc9000358f046 R14: ffffffff8cf25d00 R15: dffffc0000000000
FS:  00007fccdf53d6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8805c18158 CR3: 0000000066a29000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000200000000980 DR2: 0000200000000200
DR3: 0000200000000200 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 perf_get_guest_cbs include/linux/perf_event.h:1274 [inline]
 perf_misc_flags+0x56/0x1b0 arch/x86/events/core.c:2961
 perf_prepare_sample+0x132/0x1cb0 kernel/events/core.c:7634
 __perf_event_output kernel/events/core.c:7814 [inline]
 perf_event_output_forward+0x185/0x2e0 kernel/events/core.c:7834
 __perf_event_overflow+0x35f/0x550 kernel/events/core.c:9527
 perf_swevent_overflow kernel/events/core.c:9603 [inline]
 perf_swevent_event+0x4b8/0x540 kernel/events/core.c:9641
 perf_tp_event+0x324/0xbe0 kernel/events/core.c:10059
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10033
 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 f6 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:ffffc9000358f620 EFLAGS: 00000206
RAX: 755cfb7ddd059d00 RBX: 1ffff920006b1ec8 RCX: 755cfb7ddd059d00
RDX: dffffc0000000000 RSI: ffffffff8a2b2b60 RDI: ffffffff8a7a5100
RBP: ffffc9000358f700 R08: ffff8880b8e3b30b R09: 1ffff110171c7661
R10: dffffc0000000000 R11: ffffed10171c7662 R12: ffffffff8d123400
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]
 percpu_ref_get_many+0xcb/0x110 include/linux/percpu-refcount.h:209
 percpu_ref_get include/linux/percpu-refcount.h:222 [inline]
 obj_cgroup_get include/linux/memcontrol.h:805 [inline]
 refill_obj_stock+0x12a/0x470 mm/memcontrol.c:3243
 memcg_slab_free_hook+0x14e/0x1e0 mm/slab.h:364
 do_slab_free mm/slub.c:3437 [inline]
 ___cache_free+0x63/0x120 mm/slub.c:3511
 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xc0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3225 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 kmem_cache_alloc+0x15d/0x280 mm/slub.c:3238
 __d_alloc+0x27/0x6d0 fs/dcache.c:1751
 d_alloc_pseudo+0x19/0x70 fs/dcache.c:1882
 alloc_file_pseudo+0xe0/0x200 fs/file_table.c:256
 __anon_inode_getfile fs/anon_inodes.c:109 [inline]
 anon_inode_getfile+0xc1/0x1a0 fs/anon_inodes.c:147
 __do_sys_perf_event_open kernel/events/core.c:12625 [inline]
 __se_sys_perf_event_open+0xc00/0x1bb0 kernel/events/core.c:12399
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fcce1310f19
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:00007fccdf53d028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fcce158e090 RCX: 00007fcce1310f19
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000200000000000
RBP: 00007fcce139ff6d R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcce158e128 R14: 00007fcce158e090 R15: 00007fff233f0a08
 </TASK>