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BUG: KCSAN: data-race in delete_from_page_cache_batch / folio_mapping

write to 0xffffea00049ee918 of 8 bytes by task 2326 on cpu 1:
 page_cache_delete_batch mm/filemap.c:315 [inline]
 delete_from_page_cache_batch+0x301/0x760 mm/filemap.c:341
 truncate_inode_pages_range+0x305/0x8b0 mm/truncate.c:381
 truncate_inode_pages+0x20/0x30 mm/truncate.c:466
 kill_bdev block/bdev.c:78 [inline]
 set_blocksize+0x24e/0x270 block/bdev.c:158
 sb_set_blocksize block/bdev.c:167 [inline]
 sb_min_blocksize+0x92/0x110 block/bdev.c:183
 fat_fill_super+0xe95/0x2af0 fs/fat/inode.c:1646
 msdos_fill_super+0x29/0x30 fs/fat/namei_msdos.c:655
 mount_bdev+0x1e8/0x290 fs/super.c:1370
 msdos_mount+0x2d/0x40 fs/fat/namei_msdos.c:662
 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:2994 [inline]
 path_mount+0x11cf/0x1c40 fs/namespace.c:3324
 do_mount fs/namespace.c:3337 [inline]
 __do_sys_mount fs/namespace.c:3545 [inline]
 __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3522
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3522
 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 0xffffea00049ee918 of 8 bytes by task 2329 on cpu 0:
 folio_mapping+0x92/0x120 mm/util.c:715
 folio_evictable mm/internal.h:121 [inline]
 __pagevec_lru_add_fn+0x81/0x380 mm/swap.c:1043
 __pagevec_lru_add+0x1c3/0x270 mm/swap.c:1071
 folio_add_lru+0x11a/0x160 mm/swap.c:469
 lru_cache_add+0x37/0x50 mm/folio-compat.c:108
 lru_cache_add_inactive_or_unevictable+0x46/0x140 mm/swap.c:500
 wp_page_copy+0x779/0x10e0 mm/memory.c:3070
 do_wp_page+0x4fb/0xa80
 handle_pte_fault mm/memory.c:4592 [inline]
 __handle_mm_fault mm/memory.c:4709 [inline]
 handle_mm_fault+0x975/0x1590 mm/memory.c:4807
 do_user_addr_fault+0x617/0xb90 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1484 [inline]
 exc_page_fault+0x91/0x290 arch/x86/mm/fault.c:1540
 asm_exc_page_fault+0x1e/0x30

value changed: 0xffff88811d6d75b0 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2329 Comm: syz-executor.4 Tainted: G        W         5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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