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BUG: KCSAN: data-race in delete_from_page_cache_batch / folio_mapping

write to 0xffffea0004d533d8 of 8 bytes by task 14679 on cpu 1:
 page_cache_delete_batch mm/filemap.c:308 [inline]
 delete_from_page_cache_batch+0x32a/0x710 mm/filemap.c:334
 truncate_inode_pages_range+0x1bd/0x6a0 mm/truncate.c:359
 truncate_inode_pages+0x24/0x30 mm/truncate.c:439
 kill_bdev block/bdev.c:79 [inline]
 set_blocksize+0x26c/0x290 block/bdev.c:155
 sb_set_blocksize block/bdev.c:164 [inline]
 sb_min_blocksize+0x83/0x110 block/bdev.c:180
 fat_fill_super+0xf78/0x28e0 fs/fat/inode.c:1653
 vfat_fill_super+0x30/0x40 fs/fat/namei_vfat.c:1200
 mount_bdev+0x14f/0x1e0 fs/super.c:1663
 vfat_mount+0x31/0x40 fs/fat/namei_vfat.c:1207
 legacy_get_tree+0x74/0xd0 fs/fs_context.c:662
 vfs_get_tree+0x53/0x1d0 fs/super.c:1784
 do_new_mount+0x227/0x690 fs/namespace.c:3352
 path_mount+0x496/0xb30 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3875
 __x64_sys_mount+0x67/0x80 fs/namespace.c:3875
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffffea0004d533d8 of 8 bytes by task 14658 on cpu 0:
 folio_mapping+0x92/0x110 mm/util.c:782
 folio_evictable mm/internal.h:162 [inline]
 lru_add_fn+0x8d/0x430 mm/swap.c:181
 folio_batch_move_lru+0x21e/0x2f0 mm/swap.c:217
 lru_add_drain_cpu+0x77/0x270 mm/swap.c:652
 lru_add_drain mm/swap.c:752 [inline]
 __folio_batch_release+0x5f/0xe0 mm/swap.c:1059
 folio_batch_release include/linux/pagevec.h:83 [inline]
 invalidate_inode_pages2_range+0x692/0x720 mm/truncate.c:670
 kiocb_invalidate_pages+0x1b1/0x1e0 mm/filemap.c:2716
 __iomap_dio_rw+0x5ad/0x1090 fs/iomap/direct-io.c:638
 iomap_dio_rw+0x40/0x90 fs/iomap/direct-io.c:748
 ext4_dio_write_iter fs/ext4/file.c:577 [inline]
 ext4_file_write_iter+0xa8a/0xe10 fs/ext4/file.c:696
 call_write_iter include/linux/fs.h:2085 [inline]
 iter_file_splice_write+0x5de/0x950 fs/splice.c:743
 do_splice_from fs/splice.c:941 [inline]
 direct_splice_actor+0x167/0x2c0 fs/splice.c:1164
 splice_direct_to_actor+0x2fb/0x660 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0xd7/0x150 fs/splice.c:1233
 do_sendfile+0x3b9/0x960 fs/read_write.c:1295
 __do_sys_sendfile64 fs/read_write.c:1362 [inline]
 __se_sys_sendfile64 fs/read_write.c:1348 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0xffff888100631198 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14658 Comm: syz-executor.1 Not tainted 6.8.0-rc4-syzkaller-00410-gc02197fc9076 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
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