rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1):
 P11686/1:b..l

rcu: 	(detected by 1, t=10502 jiffies, g=39661, q=1192 ncpus=2)
task:syz.2.1250      state:R
  running task     stack:25264 pid:11686 tgid:11685 ppid:5837   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:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5853
Code: 2b 00 74 08 4c 89 f7 e8 1a 2b 8b 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90003caf600 EFLAGS: 00000206

RAX: 0000000000000001 RBX: 1ffff92000795ecc RCX: ffff888026d8e4d8
RDX: dffffc0000000000 RSI: ffffffff8c0aaae0 RDI: ffffffff8c5fb060
RBP: ffffc90003caf750 R08: ffffffff942a4887 R09: 1ffffffff2854910
R10: dffffc0000000000 R11: fffffbfff2854911 R12: 1ffff92000795ec8
R13: dffffc0000000000 R14: ffffc90003caf660 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 percpu_ref_put_many include/linux/percpu-refcount.h:330 [inline]
 percpu_ref_put+0x36/0x180 include/linux/percpu-refcount.h:351
 css_put include/linux/cgroup_refcnt.h:79 [inline]
 __mem_cgroup_charge+0x59/0x80 mm/memcontrol.c:4513
 mem_cgroup_charge include/linux/memcontrol.h:646 [inline]
 shmem_alloc_and_add_folio+0x89e/0x1080 mm/shmem.c:1847
 shmem_get_folio_gfp+0x621/0x1840 mm/shmem.c:2357
 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: 0033:0x7f36131847df
RSP: 002b:00007f3613feedf0 EFLAGS: 00000293
 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f36131847df
RDX: 0000000001000000 RSI: 00007f3608a00000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000050ed
R10: 000000002000a2c2 R11: 0000000000000293 R12: 0000000000000004
R13: 00007f3613feeef0 R14: 00007f3613feeeb0 R15: 00007f3608a00000
 </TASK>