rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=013/1/0x4000000000000000 softirq=60582/60582 fqs=5087 
	(t=10500 jiffies g=108065 q=1968)
NMI backtrace for cpu 0
CPU: 0 PID: 25732 Comm: syz-executor.3 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
 rcu_pending kernel/rcu/tree.c:3880 [inline]
 rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2599
 update_process_times+0x16d/0x200 kernel/time/timer.c:1785
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:55 [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+0x44/0x180 mm/kasan/generic.c:189
Code: 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86 05 01 00 00 49 83 e9 01 48 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 ca <48> c1 ed 03 49 c1 ea 03 48 01 c5 49 01 c2 48 89 e8 49 8d 5a 01 48
RSP: 0018:ffffc900088b7078 EFLAGS: 00000296
RAX: dffffc0000000000 RBX: ffffc900088b73e0 RCX: ffffffff8194402a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801b95ada8
RBP: ffff88801b95ada8 R08: 0000000000000000 R09: ffff88801b95adaf
R10: ffff88801b95adaf R11: 0000000000000001 R12: ffff88801b95ada8
R13: dffffc0000000000 R14: ffff88801b95acf0 R15: 0000000000000010
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 atomic64_read include/linux/atomic/atomic-instrumented.h:605 [inline]
 perf_event_count kernel/events/core.c:4414 [inline]
 perf_output_read_group kernel/events/core.c:6924 [inline]
 perf_output_read+0xc5a/0x1310 kernel/events/core.c:6961
 perf_output_sample+0xd12/0x1d80 kernel/events/core.c:7008
 __perf_event_output kernel/events/core.c:7493 [inline]
 perf_event_output_forward+0x119/0x280 kernel/events/core.c:7507
 __perf_event_overflow+0x13c/0x3d0 kernel/events/core.c:9177
 perf_swevent_overflow kernel/events/core.c:9253 [inline]
 perf_swevent_event+0x347/0x550 kernel/events/core.c:9281
 do_perf_sw_event kernel/events/core.c:9394 [inline]
 ___perf_sw_event+0x31a/0x570 kernel/events/core.c:9425
 __perf_sw_event+0x54/0x130 kernel/events/core.c:9437
 perf_sw_event include/linux/perf_event.h:1173 [inline]
 mm_account_fault mm/memory.c:4755 [inline]
 handle_mm_fault+0x5ef/0x790 mm/memory.c:4806
 do_user_addr_fault+0x48b/0x11c0 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1485 [inline]
 exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1541
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:206
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 0f 1f 80 00 00 00 00 0f 01 cb 83 fa 40 0f 82 70 ff ff ff 89 d1 <f3> a4 31 c0 0f 01 ca c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 83 f8
RSP: 0018:ffffc900088b7910 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 0000000000008000 RCX: 0000000000000fcb
RDX: 0000000000008000 RSI: 0000000020f0c000 RDI: ffff88804b437035
RBP: ffff88804b430000 R08: 0000000000000001 R09: ffff88804b437fff
R10: ffffed1009686fff R11: 0000000000000000 R12: 0000000020f04fcb
R13: 0000000020f0cfcb R14: 0000000000000000 R15: ffffc900088b7d70
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
 copyin.part.0+0xe4/0x110 lib/iov_iter.c:168
 copyin lib/iov_iter.c:720 [inline]
 _copy_from_iter+0x2a3/0x1320 lib/iov_iter.c:720
 copy_from_iter include/linux/uio.h:162 [inline]
 copy_from_iter_full include/linux/uio.h:168 [inline]
 skb_do_copy_data_nocache+0x145/0x310 include/net/sock.h:2113
 skb_copy_to_page_nocache include/net/sock.h:2139 [inline]
 tcp_sendmsg_locked+0x1239/0x2f10 net/ipv4/tcp.c:1358
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1458
 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:821
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:724
 __sys_sendto+0x21c/0x320 net/socket.c:2036
 __do_sys_sendto net/socket.c:2048 [inline]
 __se_sys_sendto net/socket.c:2044 [inline]
 __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2044
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f80fa5b1a39
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f80f7b27188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f80fa6c4f60 RCX: 00007f80fa5b1a39
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000007
RBP: 00007f80fa60be8f R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc3cf8f07f R14: 00007f80f7b27300 R15: 0000000000022000
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	00 00                	add    %al,(%rax)
   2:	48 b8 ff ff ff ff ff 	movabs $0xffff7fffffffffff,%rax
   9:	7f ff ff
   c:	48 39 c7             	cmp    %rax,%rdi
   f:	0f 86 05 01 00 00    	jbe    0x11a
  15:	49 83 e9 01          	sub    $0x1,%r9
  19:	48 89 fd             	mov    %rdi,%rbp
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
  26:	4d 89 ca             	mov    %r9,%r10
* 29:	48 c1 ed 03          	shr    $0x3,%rbp <-- trapping instruction
  2d:	49 c1 ea 03          	shr    $0x3,%r10
  31:	48 01 c5             	add    %rax,%rbp
  34:	49 01 c2             	add    %rax,%r10
  37:	48 89 e8             	mov    %rbp,%rax
  3a:	49 8d 5a 01          	lea    0x1(%r10),%rbx
  3e:	48                   	rex.W