rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (48 ticks this GP) idle=429/1/0x4000000000000002 softirq=6961/6961 fqs=2112 
	(detected by 1, t=10504 jiffies, g=6517, q=1892)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4464 Comm: syz.4.63 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:101 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x68/0x290 mm/kasan/generic.c:189
Code: 89 fe 49 c1 ee 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 16 4c 8d 44 3e ff 4d 89 c1 49 c1 e9 03 4b 8d 1c 21 49 89 df 4d 29 df <49> 83 ff 10 7f 29 4d 85 ff 0f 84 38 01 00 00 4c 89 cb 48 f7 d3 4c
RSP: 0018:ffffc90000007390 EFLAGS: 00000002
RAX: 0000000000000001 RBX: fffffbfff1b13b86 RCX: ffffffff815d01b6
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8d89dc28
RBP: ffffc900000074d8 R08: ffffffff8d89dc2f R09: 1ffffffff1b13b85
R10: dffffc0000000000 R11: fffffbfff1b13b85 R12: dffffc0000000001
R13: 1ffff92000000e84 R14: 1ffffffff1b13b85 R15: 0000000000000001
FS:  00007f8fb3fa26c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7718d80ff8 CR3: 00000000248e0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
 cpumask_test_cpu include/linux/cpumask.h:344 [inline]
 cpu_online include/linux/cpumask.h:895 [inline]
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0xb6/0x400 kernel/locking/lockdep.c:5594
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:313
 rcu_read_lock include/linux/rcupdate.h:740 [inline]
 __perf_event_output kernel/events/core.c:7800 [inline]
 perf_event_output_forward+0xbc/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:kasan_mem_to_shadow include/linux/kasan.h:55 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x57/0x290 mm/kasan/generic.c:189
Code: 0f 82 fa 01 00 00 49 bc 01 00 00 00 00 fc ff df 49 89 fe 49 c1 ee 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 16 4c 8d 44 3e ff <4d> 89 c1 49 c1 e9 03 4b 8d 1c 21 49 89 df 4d 29 df 49 83 ff 10 7f
RSP: 0018:ffffc90000007b48 EFLAGS: 00000a02
RAX: ffffffff81689101 RBX: 0000000000000028 RCX: ffffffff81689219
RDX: 0000000000000001 RSI: 0000000000000028 RDI: ffffc90000007be0
RBP: ffffc90000007c90 R08: ffffc90000007c07 R09: 1ffff920001cdf55
R10: dffffc0000000000 R11: fffff52000000f7c R12: dffffc0000000001
R13: ffffc90000007be0 R14: 1ffff92000000f7c R15: ffffc90000007be0
 memcpy+0x3c/0x60 mm/kasan/shadow.c:66
 lockdep_copy_map include/linux/lockdep.h:35 [inline]
 call_timer_fn+0xb9/0x540 kernel/time/timer.c:1638
 expire_timers kernel/time/timer.c:1699 [inline]
 __run_timers+0x53e/0x800 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x339/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 00 00 00 66 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ee ea 97 f7 48 89 df e8 26 c3 98 f7 e8 91 b5 b9 f7 fb bf 01 00 00 00 <e8> a6 c9 8c f7 65 8b 05 47 d7 3c 76 85 c0 74 02 5b c3 e8 94 e4 3a
RSP: 0018:ffffc9000326fbc0 EFLAGS: 00000282
RAX: c20818d6ccd44200 RBX: ffff888062985c80 RCX: c20818d6ccd44200
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: 0000000000000001
RBP: ffff888028560030 R08: ffff888062985c83 R09: 1ffff1100c530b90
R10: dffffc0000000000 R11: ffffed100c530b91 R12: ffff888062985c80
R13: 0000000000000009 R14: dffffc0000000000 R15: ffffc9000326fe00
 spin_unlock_irq include/linux/spinlock.h:414 [inline]
 get_signal+0x342/0x12c0 kernel/signal.c:2865
 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: 0033:0x7f8fb5d48629
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:00007f8fb3fa2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: 000000000000000c RBX: 00007f8fb5fc1fa0 RCX: 00007f8fb5d48629
RDX: 0000000000000084 RSI: 0000000000000005 RDI: 0000000000000002
RBP: 00007f8fb5ddeb39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8fb5fc2038 R14: 00007f8fb5fc1fa0 R15: 00007ffda3e613d8
 </TASK>