rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P29944/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=152129, q=1582 ncpus=1)
task:syz.3.10787     state:R  running task     stack:23168 pid:29944 tgid:29944 ppid:5826   task_flags:0x400640 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5295 [inline]
 __schedule+0xfee/0x6120 kernel/sched/core.c:6908
 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7235
 irqentry_exit+0x17b/0x670 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5872
Code: 05 fb d8 28 12 83 f8 07 0f 87 f0 00 00 00 48 0f a3 05 c6 5f f5 0e 0f 82 c2 02 00 00 8b 35 8e 93 f5 0e 85 f6 0f 85 dd 00 00 00 <48> 8b 44 24 30 65 48 2b 05 9d d8 28 12 0f 85 02 03 00 00 48 83 c4
RSP: 0018:ffffc900073b6848 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: ffffffff8de55dc8 RDI: ffffffff8c1af7a0
RBP: ffffffff8e7e9220 R08: 0000000005f465ea R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 rcu_read_lock include/linux/rcupdate.h:850 [inline]
 get_mem_cgroup_from_mm+0x53/0x600 mm/memcontrol.c:954
 __mem_cgroup_charge+0x1a/0x1e0 mm/memcontrol.c:4760
 mem_cgroup_charge include/linux/memcontrol.h:664 [inline]
 shmem_alloc_and_add_folio+0x451/0xd40 mm/shmem.c:1982
 shmem_get_folio_gfp+0xab1/0x1900 mm/shmem.c:2555
 shmem_fault+0x1f9/0xa20 mm/shmem.c:2768
 __do_fault+0x10d/0x550 mm/memory.c:5363
 do_read_fault mm/memory.c:5798 [inline]
 do_fault+0xaf9/0x1950 mm/memory.c:5932
 do_pte_missing mm/memory.c:4477 [inline]
 handle_pte_fault mm/memory.c:6316 [inline]
 __handle_mm_fault+0x180f/0x2b60 mm/memory.c:6454
 handle_mm_fault+0x36d/0xa20 mm/memory.c:6623
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0xf9c/0x34d0 mm/gup.c:1428
 __get_user_pages_locked mm/gup.c:1692 [inline]
 get_dump_page+0x27e/0x3d0 mm/gup.c:2192
 dump_user_range+0x18d/0xb50 fs/coredump.c:1367
 elf_core_dump+0x2d5f/0x3d10 fs/binfmt_elf.c:2110
 coredump_write fs/coredump.c:1050 [inline]
 do_coredump fs/coredump.c:1127 [inline]
 vfs_coredump+0x27bc/0x5570 fs/coredump.c:1201
 get_signal+0x1f2a/0x21e0 kernel/signal.c:3019
 arch_do_signal_or_restart+0x91/0x770 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:98 [inline]
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
 irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
 irqentry_exit+0x1f8/0x670 kernel/entry/common.c:219
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x0
RSP: 002b:000000000000000a EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f7779c15fa0 RCX: 00007f777999c799
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000020003b46
RBP: 00007f7779a32bd9 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7779c16038 R14: 00007f7779c15fa0 R15: 00007ffd3f500ea8
 </TASK>