rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P21478/1:b.el
rcu: 	(detected by 1, t=10502 jiffies, g=110709, q=2657 ncpus=2)
task:syz.3.2790      state:R  running task     stack:24880 pid:21478 tgid:21475 ppid:16151  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:xas_descend lib/xarray.c:209 [inline]
RIP: 0010:xas_load+0x1da/0x5c0 lib/xarray.c:245
Code: 9c 2c d9 f5 eb 05 e8 95 2c d9 f5 4c 8b 64 24 08 48 bd 00 00 00 00 00 fc ff df 48 8b 5c 24 10 48 89 d8 48 c1 e8 03 80 3c 28 00 <74> 08 48 89 df e8 0c 95 3f f6 48 8b 04 24 48 89 03 44 89 f3 83 e3
RSP: 0018:ffffc900047d7780 EFLAGS: 00000246
RAX: 1ffff920008faf0b RBX: ffffc900047d7858 RCX: 0000000000080000
RDX: ffffc9000d1fc000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: dffffc0000000000 R08: ffffffff8bc64a63 R09: 1ffffffff2854910
R10: dffffc0000000000 R11: fffffbfff2854911 R12: ffffc900047d7840
R13: 0000000000000017 R14: 0000000000000000 R15: ffff88807e911de0
 filemap_get_entry+0x1f0/0x3b0 mm/filemap.c:1841
 shmem_get_folio_gfp+0x285/0x1840 mm/shmem.c:2281
 shmem_get_folio mm/shmem.c:2463 [inline]
 shmem_write_begin+0x165/0x350 mm/shmem.c:3119
 generic_perform_write+0x348/0x990 mm/filemap.c:4055
 shmem_file_write_iter+0xf9/0x120 mm/shmem.c:3295
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xaed/0xd30 fs/read_write.c:679
 ksys_write+0x18f/0x2b0 fs/read_write.c:731
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff96f5847df
RSP: 002b:00007ff9702dcdf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000002000000 RCX: 00007ff96f5847df
RDX: 0000000002000000 RSI: 00007ff964e00000 RDI: 000000000000000b
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000b8a4
R10: 0000000000000002 R11: 0000000000000293 R12: 000000000000000b
R13: 00007ff9702dcef0 R14: 00007ff9702dceb0 R15: 00007ff964e00000
 </TASK>