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BUG: KCSAN: data-race in delete_from_page_cache_batch / folio_mapping

write to 0xffffea000552cad8 of 8 bytes by task 6787 on cpu 0:
 page_cache_delete_batch mm/filemap.c:322 [inline]
 delete_from_page_cache_batch+0x35c/0x780 mm/filemap.c:353
 truncate_inode_pages_range+0x1d5/0xa00 mm/truncate.c:336
 truncate_inode_pages+0x20/0x30 mm/truncate.c:435
 kill_bdev block/bdev.c:78 [inline]
 set_blocksize+0x24e/0x270 block/bdev.c:158
 sb_set_blocksize+0x2c/0xa0 block/bdev.c:167
 ext4_fill_super+0x2287/0x78f0 fs/ext4/super.c:4333
 mount_bdev+0x1e8/0x290 fs/super.c:1370
 ext4_mount+0x2d/0x40 fs/ext4/super.c:6523
 legacy_get_tree+0x70/0xc0 fs/fs_context.c:610
 vfs_get_tree+0x4a/0x1a0 fs/super.c:1500
 do_new_mount fs/namespace.c:2988 [inline]
 path_mount+0x11cf/0x1c40 fs/namespace.c:3318
 do_mount fs/namespace.c:3331 [inline]
 __do_sys_mount fs/namespace.c:3539 [inline]
 __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3516
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3516
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffffea000552cad8 of 8 bytes by task 6789 on cpu 1:
 folio_mapping+0x92/0x120 mm/util.c:722
 folio_evictable mm/internal.h:112 [inline]
 __pagevec_lru_add_fn+0x81/0x380 mm/swap.c:1043
 __pagevec_lru_add+0x1c3/0x270 mm/swap.c:1071
 lru_add_drain_cpu+0x6a/0x260 mm/swap.c:613
 lru_add_drain+0x21/0x60 mm/swap.c:717
 free_pages_and_swap_cache+0x1d/0x200 mm/swap_state.c:317
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:242 [inline]
 tlb_flush_mmu+0x597/0x5f0 mm/mmu_gather.c:249
 zap_pte_range+0xe56/0x10e0 mm/memory.c:1418
 zap_pmd_range mm/memory.c:1467 [inline]
 zap_pud_range mm/memory.c:1496 [inline]
 zap_p4d_range mm/memory.c:1517 [inline]
 unmap_page_range+0x2dc/0x3d0 mm/memory.c:1538
 unmap_single_vma+0x157/0x210 mm/memory.c:1583
 unmap_vmas+0xd0/0x180 mm/memory.c:1615
 exit_mmap+0x23d/0x470 mm/mmap.c:3170
 __mmput+0x27/0x1b0 kernel/fork.c:1113
 mmput+0x3d/0x50 kernel/fork.c:1134
 exit_mm+0xdb/0x170 kernel/exit.c:507
 do_exit+0x608/0x17a0 kernel/exit.c:819
 do_group_exit+0xce/0x180 kernel/exit.c:929
 get_signal+0xfc3/0x1550 kernel/signal.c:2852
 arch_do_signal_or_restart+0x8c/0x2e0 arch/x86/kernel/signal.c:868
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x113/0x190 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300
 do_syscall_64+0x50/0xd0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0xffff88810136cbb8 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 6789 Comm: syz-executor.1 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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