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BUG: KCSAN: data-race in next_uptodate_page / truncate_setsize

read-write to 0xffff88813488b768 of 8 bytes by task 16898 on cpu 0:
 truncate_setsize+0x21/0xb0
 fat_setattr+0x8ea/0xa00
 notify_change+0x9f6/0xb10
 do_truncate+0x116/0x150
 vfs_truncate+0x1e4/0x230
 do_sys_truncate+0x98/0x130
 __x64_sys_truncate+0x31/0x40
 do_syscall_64+0x41/0xc0
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88813488b768 of 8 bytes by task 16882 on cpu 1:
 next_uptodate_page+0x47b/0x560
 filemap_map_pages+0x722/0x830
 handle_mm_fault+0x1044/0x24d0
 __get_user_pages+0x353/0xc60
 __mm_populate+0x23a/0x360
 vm_mmap_pgoff+0x174/0x210
 ksys_mmap_pgoff+0x2ac/0x320
 do_syscall_64+0x41/0xc0
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x000000000003fff7 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 16882 Comm: syz-executor.4 Tainted: G        W          6.2.0-rc7-syzkaller-00018-g0983f6bf2bfc-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
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