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BUG: KCSAN: data-race in delete_from_page_cache_batch / page_mapping

write to 0xffffea0005331658 of 8 bytes by task 23463 on cpu 1:
 page_cache_delete_batch mm/filemap.c:319 [inline]
 delete_from_page_cache_batch+0x30c/0x6c0 mm/filemap.c:349
 truncate_inode_pages_range+0x1d5/0xad0 mm/truncate.c:326
 truncate_inode_pages mm/truncate.c:425 [inline]
 truncate_pagecache+0x4f/0x70 mm/truncate.c:735
 ext4_setattr+0xa5b/0xef0 fs/ext4/inode.c:5515
 notify_change+0x8a3/0xac0 fs/attr.c:410
 do_truncate+0xf7/0x140 fs/open.c:64
 handle_truncate fs/namei.c:3084 [inline]
 do_open fs/namei.c:3432 [inline]
 path_openat+0x1925/0x1ec0 fs/namei.c:3561
 do_filp_open+0x105/0x220 fs/namei.c:3588
 do_sys_openat2+0xb5/0x2b0 fs/open.c:1200
 do_sys_open fs/open.c:1216 [inline]
 __do_sys_creat fs/open.c:1290 [inline]
 __se_sys_creat fs/open.c:1284 [inline]
 __x64_sys_creat+0x62/0x80 fs/open.c:1284
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffffea0005331658 of 8 bytes by task 23428 on cpu 0:
 page_mapping+0x111/0x1c0 mm/util.c:725
 page_evictable mm/internal.h:83 [inline]
 __pagevec_lru_add_fn+0x82/0x490 mm/swap.c:1024
 __pagevec_lru_add+0x189/0x240 mm/swap.c:1052
 lru_cache_add mm/swap.c:453 [inline]
 lru_cache_add_inactive_or_unevictable+0x156/0x270 mm/swap.c:484
 wp_page_copy+0x803/0x10a0 mm/memory.c:3061
 do_wp_page+0x5a8/0xba0
 handle_pte_fault mm/memory.c:4577 [inline]
 __handle_mm_fault mm/memory.c:4694 [inline]
 handle_mm_fault+0x96e/0x1580 mm/memory.c:4792
 do_user_addr_fault+0x609/0xbe0 arch/x86/mm/fault.c:1397
 handle_page_fault arch/x86/mm/fault.c:1485 [inline]
 exc_page_fault+0x91/0x220 arch/x86/mm/fault.c:1541
 asm_exc_page_fault+0x1e/0x30
 __setup_rt_frame+0x18b/0x3e0 arch/x86/kernel/signal.c:474
 setup_rt_frame arch/x86/kernel/signal.c:778 [inline]
 handle_signal arch/x86/kernel/signal.c:822 [inline]
 arch_do_signal_or_restart+0x1fa/0x280 arch/x86/kernel/signal.c:867
 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+0x109/0x190 kernel/entry/common.c:207
 irqentry_exit_to_user_mode+0x5/0x10 kernel/entry/common.c:313
 irqentry_exit+0xe/0x30 kernel/entry/common.c:404
 asm_exc_page_fault+0x1e/0x30

value changed: 0xffff888133712930 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 23428 Comm: syz-executor.0 Not tainted 5.15.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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