rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (27 ticks this GP) idle=409/1/0x4000000000000002 softirq=30705/30705 fqs=5250 
	(detected by 1, t=10502 jiffies, g=43213, q=1725)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 12252 Comm: syz.2.2160 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:check_preemption_disabled+0x42/0x110 lib/smp_processor_id.c:55
Code: 65 8b 05 49 17 59 76 65 8b 0d b2 71 59 76 f7 c1 ff ff ff 7f 74 1f 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 <48> 83 c4 10 5b 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04
RSP: 0018:ffffc900031aea48 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: aa6f7e2298a76700
RDX: 0000000000000000 RSI: ffffffff8a59a220 RDI: ffffffff8a59a1e0
RBP: ffffc900031aebc0 R08: dffffc0000000000 R09: fffffbfff1ad31be
R10: fffffbfff1ad31be R11: 1ffffffff1ad31bd R12: ffffffff8c11c460
R13: 1ffff92000635d60 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f6640fbe6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000072bc6000 CR4: 00000000003506f0
DR0: 0000200000000380 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:331 [inline]
 rcu_is_watching+0x11/0xa0 kernel/rcu/tree.c:1123
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0xcd/0x3f0 kernel/locking/lockdep.c:5594
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:312
 rcu_read_lock include/linux/rcupdate.h:739 [inline]
 __perf_output_begin kernel/events/ring_buffer.c:163 [inline]
 perf_output_begin_forward+0x97/0xa30 kernel/events/ring_buffer.c:271
 __perf_event_output kernel/events/core.c:7804 [inline]
 perf_event_output_forward+0x15c/0x280 kernel/events/core.c:7822
 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515
 perf_swevent_overflow kernel/events/core.c:9591 [inline]
 perf_swevent_event+0x4ad/0x530 kernel/events/core.c:9629
 perf_tp_event+0x32c/0xb50 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2be/0x380 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:lock_is_held_type+0x13a/0x190 kernel/locking/lockdep.c:5671
Code: 75 40 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 46 41 f7 c5 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 3c 89 e8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc900031af3d8 EFLAGS: 00000206
RAX: aa6f7e2298a76700 RBX: ffff88802bba1dc0 RCX: aa6f7e2298a76700
RDX: 0000000000000010 RSI: ffffffff8a0b28c0 RDI: ffffffff8a59a240
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffc900031af580
R10: fffff52000635eb2 R11: 1ffff92000635eb0 R12: 0000000000000002
R13: 0000000000000246 R14: ffffffff8c11c4c0 R15: ffff88802bba2900
 lock_is_held include/linux/lockdep.h:287 [inline]
 schedule_debug kernel/sched/core.c:5621 [inline]
 __schedule+0x1b6/0x4390 kernel/sched/core.c:6286
 preempt_schedule_irq+0xb1/0x150 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:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:rcu_read_unlock_special+0xcc/0x480 kernel/rcu/tree_plugin.h:635
Code: 00 65 48 8b 04 25 28 00 00 00 48 3b 84 24 80 00 00 00 0f 85 33 03 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 49 89 ff <48> c7 44 24 60 00 00 00 00 9c 8f 44 24 60 4c 8b 64 24 60 fa 41 f7
RSP: 0018:ffffc900031af760 EFLAGS: 00000246
RAX: f2f2f200f1f1f1f1 RBX: 1ffff92000635ef0 RCX: ffff88802bba1dc0
RDX: 0000000000000000 RSI: ffffffff8a59a220 RDI: ffff88802bba1dc0
RBP: ffffc900031af828 R08: dffffc0000000000 R09: fffffbfff1ff7619
R10: fffffbfff1ff7619 R11: 1ffffffff1ff7618 R12: 1ffff1100577443f
R13: dffffc0000000000 R14: 0000000080000000 R15: ffff88802bba1dc0
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 percpu_ref_put_many include/linux/percpu-refcount.h:324 [inline]
 percpu_ref_put include/linux/percpu-refcount.h:338 [inline]
 css_put include/linux/cgroup.h:405 [inline]
 get_mm_memcg_path+0x24f/0x330 mm/mmap_lock.c:83
 __mmap_lock_do_trace_released+0x98/0x280 mm/mmap_lock.c:108
 __mmap_lock_trace_released include/linux/mmap_lock.h:42 [inline]
 mmap_read_unlock include/linux/mmap_lock.h:143 [inline]
 __bad_area arch/x86/mm/fault.c:827 [inline]
 bad_area+0x89/0x90 arch/x86/mm/fault.c:835
 handle_page_fault arch/x86/mm/fault.c:1445 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline]
RIP: 0010:strncpy_from_user+0x163/0x360 lib/strncpy_from_user.c:139
Code: 4c 89 e6 e8 9f 9f 7d fd 49 83 fc 07 0f 86 a1 00 00 00 4c 89 74 24 08 48 c7 44 24 10 f8 ff ff ff 45 31 ed 4c 89 3c 24 48 89 dd <4f> 8b 3c 2f 48 b8 ff fe fe fe fe fe fe fe 49 8d 1c 07 4d 89 fe 49
RSP: 0018:ffffc900031afb90 EFLAGS: 00050246
RAX: ffffffff83fa2ef1 RBX: ffffc900031afcb0 RCX: ffff88802bba1dc0
RDX: 0000000000000000 RSI: 000000000000007f RDI: 0000000000000007
RBP: ffffc900031afcb0 R08: ffff88802bba1dc0 R09: 0000000000000003
R10: 0000000000000002 R11: 0000000000000000 R12: 000000000000007f
R13: 0000000000000000 R14: 000000000000007f R15: 0000000000000000
 strncpy_from_bpfptr include/linux/bpfptr.h:84 [inline]
 bpf_prog_load+0x1a8/0x1550 kernel/bpf/syscall.c:2233
 __sys_bpf+0x4c2/0x670 kernel/bpf/syscall.c:4651
 __do_sys_bpf kernel/bpf/syscall.c:4755 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4753 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753
 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: 0033:0x7f6642d77be9
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:00007f6640fbe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f6642faf090 RCX: 00007f6642d77be9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f6642dfae19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6642faf128 R14: 00007f6642faf090 R15: 00007ffe502fcfa8
 </TASK>