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BUG: KCSAN: data-race in next_uptodate_page / shmem_write_end

write to 0xffff888136a6b118 of 8 bytes by task 9235 on cpu 1:
 i_size_write include/linux/fs.h:886 [inline]
 shmem_write_end+0x5d/0x3b0 mm/shmem.c:2567
 generic_perform_write+0x253/0x3d0 mm/filemap.c:3783
 __generic_file_write_iter+0xe6/0x290 mm/filemap.c:3900
 generic_file_write_iter+0x7d/0x1c0 mm/filemap.c:3932
 call_write_iter include/linux/fs.h:2189 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x45a/0x750 fs/read_write.c:584
 ksys_write+0xeb/0x1a0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888136a6b118 of 8 bytes by task 9236 on cpu 0:
 i_size_read include/linux/fs.h:864 [inline]
 next_uptodate_page+0x47b/0x560 mm/filemap.c:3327
 next_map_page mm/filemap.c:3352 [inline]
 filemap_map_pages+0x722/0x830 mm/filemap.c:3424
 do_fault_around mm/memory.c:4483 [inline]
 do_read_fault mm/memory.c:4509 [inline]
 do_fault mm/memory.c:4643 [inline]
 handle_pte_fault mm/memory.c:4931 [inline]
 __handle_mm_fault mm/memory.c:5073 [inline]
 handle_mm_fault+0x1044/0x24d0 mm/memory.c:5219
 faultin_page mm/gup.c:926 [inline]
 __get_user_pages+0x353/0xc60 mm/gup.c:1153
 populate_vma_page_range mm/gup.c:1526 [inline]
 __mm_populate+0x23a/0x360 mm/gup.c:1640
 mm_populate include/linux/mm.h:2874 [inline]
 vm_mmap_pgoff+0x174/0x210 mm/util.c:525
 ksys_mmap_pgoff+0x2ac/0x320 mm/mmap.c:1457
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x0000000000e0f000 -> 0x0000000000e15000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 9236 Comm: syz-executor.5 Not tainted 6.2.0-rc8-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
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