rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P26710/1:b..l
	(detected by 0, t=10502 jiffies, g=187773, q=18250 ncpus=2)
task:syz.2.5713      state:R  running task     stack:25360 pid:26710 ppid:22843  flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0x107f/0x4030 kernel/sched/core.c:6563
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6875
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:preempt_count_add+0x2/0x190 kernel/sched/core.c:5702
Code: 58 0d 00 00 80 e1 07 80 c1 03 38 c1 7c 8b 49 8d be 58 0d 00 00 e8 6e a4 7a 00 e9 7a ff ff ff e9 f9 fe ff ff 0f 1f 40 00 41 57 <41> 56 53 49 bf 00 00 00 00 00 fc ff df 48 c7 c0 40 61 c1 96 48 c1
RSP: 0018:ffffc90003ab7820 EFLAGS: 00000282
RAX: 1ffff92000756f64 RBX: ffff88807c3369c0 RCX: dffffc0000000000
RDX: ffffc90003ab7b20 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90003ab79d0 R08: ffffea0001197507 R09: 1ffffd4000232ea0
R10: dffffc0000000000 R11: fffff94000232ea1 R12: 00002000006f0000
R13: ffffc90003ab7ac0 R14: ffff888026635780 R15: ffff888026635780
 __raw_spin_lock include/linux/spinlock_api_smp.h:132 [inline]
 _raw_spin_lock+0xe/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 filemap_map_pages+0x91e/0x11e0 mm/filemap.c:3482
 do_fault_around mm/memory.c:4598 [inline]
 do_read_fault mm/memory.c:4624 [inline]
 do_fault mm/memory.c:4758 [inline]
 handle_pte_fault mm/memory.c:5029 [inline]
 __handle_mm_fault mm/memory.c:5171 [inline]
 handle_mm_fault+0x25e5/0x3d40 mm/memory.c:5292
 faultin_page mm/gup.c:1026 [inline]
 __get_user_pages+0x40d/0xec0 mm/gup.c:1250
 populate_vma_page_range+0x214/0x2b0 mm/gup.c:1607
 __mm_populate+0x25c/0x380 mm/gup.c:1721
 mm_populate include/linux/mm.h:2891 [inline]
 vm_mmap_pgoff+0x212/0x2d0 mm/util.c:525
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fac2899df99
RSP: 002b:00007fac297f8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fac28c25fa0 RCX: 00007fac2899df99
RDX: b635773f06ebbeef RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007fac28a34ec4 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fac28c26038 R14: 00007fac28c25fa0 R15: 00007ffe9e75d578
 </TASK>