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BUG: KCSAN: data-race in do_try_to_free_pages / shrink_node

write to 0xffff88811bde7070 of 8 bytes by task 15438 on cpu 0:
 snapshot_refaults mm/vmscan.c:6164 [inline]
 do_try_to_free_pages+0x95f/0xce0 mm/vmscan.c:6226
 try_to_free_mem_cgroup_pages+0x1e2/0x480 mm/vmscan.c:6518
 try_charge_memcg+0x280/0xd20 mm/memcontrol.c:2762
 try_charge mm/memcontrol.c:2904 [inline]
 charge_memcg mm/memcontrol.c:7241 [inline]
 mem_cgroup_swapin_charge_folio+0x107/0x190 mm/memcontrol.c:7326
 __read_swap_cache_async+0x2b9/0x510 mm/swap_state.c:498
 swap_cluster_readahead+0x276/0x3f0 mm/swap_state.c:662
 swapin_readahead+0xe2/0x7a0 mm/swap_state.c:886
 do_swap_page+0x44c/0x1570 mm/memory.c:3898
 handle_pte_fault mm/memory.c:5147 [inline]
 __handle_mm_fault mm/memory.c:5285 [inline]
 handle_mm_fault+0x7f6/0x27b0 mm/memory.c:5450
 do_user_addr_fault arch/x86/mm/fault.c:1415 [inline]
 handle_page_fault arch/x86/mm/fault.c:1507 [inline]
 exc_page_fault+0x2f7/0x6d0 arch/x86/mm/fault.c:1563
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
 __get_user_8+0x11/0x20 arch/x86/lib/getuser.S:85
 rseq_get_rseq_cs kernel/rseq.c:161 [inline]
 rseq_ip_fixup kernel/rseq.c:281 [inline]
 __rseq_handle_notify_resume+0xc7/0xbf0 kernel/rseq.c:329
 rseq_handle_notify_resume include/linux/rseq.h:38 [inline]
 resume_user_mode_work include/linux/resume_user_mode.h:62 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0x8e/0x130 kernel/entry/common.c:212
 do_syscall_64+0x65/0x120 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff88811bde7070 of 8 bytes by task 6289 on cpu 1:
 prepare_scan_control mm/vmscan.c:2250 [inline]
 shrink_node+0x3c3/0x15d0 mm/vmscan.c:5900
 shrink_zones mm/vmscan.c:6141 [inline]
 do_try_to_free_pages+0x43d/0xce0 mm/vmscan.c:6203
 try_to_free_mem_cgroup_pages+0x1e2/0x480 mm/vmscan.c:6518
 try_charge_memcg+0x280/0xd20 mm/memcontrol.c:2762
 obj_cgroup_charge_pages+0xbd/0x1c0 mm/memcontrol.c:3275
 __memcg_kmem_charge_page+0x9c/0x170 mm/memcontrol.c:3301
 __alloc_pages+0x1bb/0x340 mm/page_alloc.c:4584
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 bpf_ringbuf_area_alloc kernel/bpf/ringbuf.c:122 [inline]
 bpf_ringbuf_alloc+0xba/0x2f0 kernel/bpf/ringbuf.c:170
 ringbuf_map_alloc+0x167/0x1d0 kernel/bpf/ringbuf.c:204
 map_create+0x713/0xa40 kernel/bpf/syscall.c:1237
 __sys_bpf+0x62a/0x780 kernel/bpf/syscall.c:5439
 __do_sys_bpf kernel/bpf/syscall.c:5561 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5559 [inline]
 __x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5559
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x0000000000000007 -> 0x0000000000000008

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 6289 Comm: syz-executor.3 Not tainted 6.7.0-syzkaller-09928-g052d534373b7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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