rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (0 ticks this GP) idle=55d/1/0x4000000000000002 softirq=46285/46286 fqs=5243 
	(detected by 1, t=10502 jiffies, g=56157, q=181956)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13940 Comm: syz.4.9016 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:mark_lock+0xd/0x320 kernel/locking/lockdep.c:4552
Code: 73 60 00 4c 89 f7 41 89 d9 e9 79 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 50 89 d5 <49> 89 f6 48 89 fb 49 bd 00 00 00 00 00 fc ff df 83 fa 08 75 29 4d
RSP: 0000:ffffc900049af840 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff88807c3dc668 RCX: ffffffff815db944
RDX: 0000000000000002 RSI: ffff88807c3dc698 RDI: ffff88807c3dbb80
RBP: 0000000000000002 R08: ffffffff901d40f7 R09: 1ffffffff203a81e
R10: dffffc0000000000 R11: fffffbfff203a81f R12: ffff88807c3dc6b8
R13: 0000000000000001 R14: 1ffff1100f87b8cd R15: ffff88807c3dc698
FS:  000055556fdd6500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f007810e000 CR3: 000000007df8a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 mark_held_locks kernel/locking/lockdep.c:4193 [inline]
 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4211 [inline]
 lockdep_hardirqs_on_prepare+0x249/0x770 kernel/locking/lockdep.c:4278
 trace_hardirqs_on+0x67/0x80 kernel/trace/trace_preemptirq.c:49
 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 12 f2 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: 0000:ffffc900049afa00 EFLAGS: 00000206
RAX: e63e3e22d05ea900 RBX: 1ffff92000935f44 RCX: e63e3e22d05ea900
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f980
RBP: ffffc900049afad0 R08: ffffffff901d40c7 R09: 1ffffffff203a818
R10: dffffc0000000000 R11: fffffbfff203a819 R12: ffffffff8c322f00
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]
 __unlock_page_memcg+0xea/0x100 mm/memcontrol.c:2093
 wp_page_copy+0xef5/0x2050 mm/memory.c:3148
 handle_pte_fault mm/memory.c:4668 [inline]
 __handle_mm_fault mm/memory.c:4785 [inline]
 handle_mm_fault+0x1f06/0x4410 mm/memory.c:4883
 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1355
 handle_page_fault arch/x86/mm/fault.c:1443 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1496
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7f0077d60f83
Code: 53 48 83 ec 38 80 3d 9b d0 3a 00 00 89 7c 24 18 48 89 74 24 28 0f 85 cd 09 00 00 80 3d 6a 07 ee 00 00 49 89 f1 41 89 d2 89 cb <c6> 05 76 d0 3a 00 01 41 89 d7 0f 85 45 04 00 00 80 3d 36 07 ee 00
RSP: 002b:00007ffc68c423c0 EFLAGS: 00010246
RAX: 00007f0078111fa0 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000003 RSI: 00007f0078112038 RDI: 0000000000000000
RBP: 00007f0078111fb0 R08: 0000000000000000 R09: 00007f0078112038
R10: 0000000000000003 R11: 0000000000000001 R12: 00007f0078111fa0
R13: 0000200000000000 R14: 00007ffc68c42438 R15: 00007f0078111fa0
 </TASK>