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BUG: KCSAN: data-race in delete_from_page_cache_batch / folio_mapping

write to 0xffffea0004bc3c58 of 8 bytes by task 6683 on cpu 1:
 page_cache_delete_batch mm/filemap.c:317 [inline]
 delete_from_page_cache_batch+0x308/0x700 mm/filemap.c:343
 truncate_inode_pages_range+0x1c5/0x6b0 mm/truncate.c:327
 truncate_inode_pages mm/truncate.c:407 [inline]
 truncate_inode_pages_final+0x55/0x60 mm/truncate.c:442
 evict+0x305/0x570 fs/inode.c:798
 iput_final fs/inode.c:1946 [inline]
 iput+0x42a/0x5b0 fs/inode.c:1972
 dentry_unlink_inode+0x24f/0x260 fs/dcache.c:422
 __dentry_kill+0x18b/0x4c0 fs/dcache.c:625
 shrink_kill fs/dcache.c:1070 [inline]
 shrink_dentry_list+0x1bc/0x3e0 fs/dcache.c:1097
 shrink_dcache_parent+0x43/0x1b0
 do_one_tree+0x16/0xb0 fs/dcache.c:1560
 shrink_dcache_for_umount+0x58/0xe0 fs/dcache.c:1577
 generic_shutdown_super+0x3e/0x220 fs/super.c:620
 kill_anon_super+0x2b/0x140 fs/super.c:1237
 kill_litter_super+0x3d/0x50 fs/super.c:1247
 ramfs_kill_sb+0x2d/0x40 fs/ramfs/inode.c:315
 deactivate_locked_super+0x7d/0x1c0 fs/super.c:473
 deactivate_super+0x9f/0xb0 fs/super.c:506
 cleanup_mnt+0x268/0x2e0 fs/namespace.c:1373
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1380
 task_work_run+0x13a/0x1a0 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xa8/0x120 kernel/entry/common.c:218
 do_syscall_64+0xd6/0x1c0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffea0004bc3c58 of 8 bytes by task 6656 on cpu 0:
 folio_mapping+0xa0/0x120 mm/util.c:847
 folio_evictable mm/internal.h:435 [inline]
 lru_add+0x89/0x440 mm/swap.c:136
 folio_batch_move_lru+0x15f/0x230 mm/swap.c:168
 lru_add_drain_cpu+0x7c/0x260 mm/swap.c:616
 lru_add_drain+0x26/0x80 mm/swap.c:698
 free_pages_and_swap_cache+0x69/0x410 mm/swap_state.c:320
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
 tlb_flush_mmu+0x2cf/0x440 mm/mmu_gather.c:373
 zap_pte_range mm/memory.c:1714 [inline]
 zap_pmd_range mm/memory.c:1753 [inline]
 zap_pud_range mm/memory.c:1782 [inline]
 zap_p4d_range mm/memory.c:1803 [inline]
 unmap_page_range+0x1fc8/0x2380 mm/memory.c:1824
 unmap_single_vma+0x142/0x1d0 mm/memory.c:1870
 unmap_vmas+0x18d/0x2b0 mm/memory.c:1914
 exit_mmap+0x18a/0x680 mm/mmap.c:1668
 __mmput+0x28/0x1d0 kernel/fork.c:1348
 mmput+0x4c/0x60 kernel/fork.c:1370
 exit_mm+0xe4/0x190 kernel/exit.c:570
 do_exit+0x559/0x17f0 kernel/exit.c:925
 do_group_exit+0x102/0x150 kernel/exit.c:1087
 get_signal+0xeb9/0x1000 kernel/signal.c:3017
 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x62/0x120 kernel/entry/common.c:218
 do_syscall_64+0xd6/0x1c0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0xffff8881171e2fe0 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 6656 Comm: syz.0.905 Not tainted 6.13.0-rc5-syzkaller-00012-g0bc21e701a6f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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