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BUG: KCSAN: data-race in delete_from_page_cache_batch / folio_mapping

write to 0xffffea00046166d8 of 8 bytes by task 3603 on cpu 0:
 page_cache_delete_batch mm/filemap.c:318 [inline]
 delete_from_page_cache_batch+0x308/0x700 mm/filemap.c:344
 truncate_inode_pages_range+0x1c5/0x6b0 mm/truncate.c:343
 truncate_inode_pages+0x24/0x30 mm/truncate.c:423
 kill_bdev block/bdev.c:91 [inline]
 set_blocksize+0x258/0x270 block/bdev.c:173
 sb_set_blocksize block/bdev.c:182 [inline]
 sb_min_blocksize+0x63/0xe0 block/bdev.c:198
 ext4_load_super fs/ext4/super.c:4992 [inline]
 __ext4_fill_super fs/ext4/super.c:5213 [inline]
 ext4_fill_super+0x38b/0x3a10 fs/ext4/super.c:5686
 get_tree_bdev+0x256/0x2e0 fs/super.c:1635
 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5718
 vfs_get_tree+0x56/0x1e0 fs/super.c:1800
 do_new_mount+0x227/0x690 fs/namespace.c:3507
 path_mount+0x49b/0xb30 fs/namespace.c:3834
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x27c/0x2d0 fs/namespace.c:4032
 __x64_sys_mount+0x67/0x80 fs/namespace.c:4032
 x64_sys_call+0x203e/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffea00046166d8 of 8 bytes by task 3601 on cpu 1:
 folio_mapping+0xa0/0x120 mm/util.c:855
 folio_evictable mm/internal.h:389 [inline]
 lru_add+0x89/0x440 mm/swap.c:181
 folio_batch_move_lru+0x15f/0x230 mm/swap.c:213
 lru_add_drain_cpu+0x7c/0x260 mm/swap.c:661
 lru_add_drain+0x26/0x80 mm/swap.c:743
 exit_mmap+0x158/0x690 mm/mmap.c:1855
 __mmput+0x28/0x1b0 kernel/fork.c:1347
 mmput+0x4c/0x60 kernel/fork.c:1369
 exit_mm+0xe4/0x190 kernel/exit.c:571
 do_exit+0x55e/0x17f0 kernel/exit.c:926
 do_group_exit+0x102/0x150 kernel/exit.c:1088
 get_signal+0xfc8/0x1100 kernel/signal.c:2936
 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:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x59/0x130 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: 0xffff8881004c1e18 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3601 Comm: syz.2.49 Not tainted 6.11.0-syzkaller-09959-gabf2050f51fd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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