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BUG: KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range

read-write to 0xffff888106a31e20 of 8 bytes by task 3760 on cpu 1:
 __filemap_add_folio+0x439/0x710 mm/filemap.c:918
 filemap_add_folio+0x9c/0x1b0 mm/filemap.c:970
 page_cache_ra_unbounded+0x148/0x2e0 mm/readahead.c:252
 do_page_cache_ra mm/readahead.c:303 [inline]
 page_cache_ra_order mm/readahead.c:488 [inline]
 page_cache_async_ra+0x40c/0x420 mm/readahead.c:638
 do_async_mmap_readahead mm/filemap.c:3203 [inline]
 filemap_fault+0x2d3/0xa60 mm/filemap.c:3300
 __do_fault+0xb6/0x200 mm/memory.c:4655
 do_read_fault mm/memory.c:5061 [inline]
 do_fault mm/memory.c:5191 [inline]
 do_pte_missing mm/memory.c:3947 [inline]
 handle_pte_fault mm/memory.c:5521 [inline]
 __handle_mm_fault mm/memory.c:5664 [inline]
 handle_mm_fault+0xe8b/0x2a30 mm/memory.c:5832
 faultin_page mm/gup.c:1194 [inline]
 __get_user_pages+0x499/0x10d0 mm/gup.c:1493
 populate_vma_page_range mm/gup.c:1932 [inline]
 __mm_populate+0x25b/0x3b0 mm/gup.c:2035
 mm_populate include/linux/mm.h:3430 [inline]
 vm_mmap_pgoff+0x1d6/0x290 mm/util.c:593
 ksys_mmap_pgoff+0x292/0x340 mm/mmap.c:1514
 x64_sys_call+0x1884/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:10
 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 0xffff888106a31e20 of 8 bytes by task 3762 on cpu 0:
 mapping_needs_writeback mm/filemap.c:635 [inline]
 filemap_write_and_wait_range+0x58/0x1f0 mm/filemap.c:684
 ext4_punch_hole+0xc5/0x7e0 fs/ext4/inode.c:3965
 ext4_fallocate+0x209/0x1190 fs/ext4/extents.c:4742
 vfs_fallocate+0x392/0x3e0 fs/open.c:334
 madvise_remove mm/madvise.c:1012 [inline]
 madvise_vma_behavior mm/madvise.c:1036 [inline]
 madvise_walk_vmas mm/madvise.c:1271 [inline]
 do_madvise+0x1177/0x2620 mm/madvise.c:1467
 __do_sys_madvise mm/madvise.c:1484 [inline]
 __se_sys_madvise mm/madvise.c:1482 [inline]
 __x64_sys_madvise+0x61/0x70 mm/madvise.c:1482
 x64_sys_call+0x2320/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:29
 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

value changed: 0x00000000000006c0 -> 0x00000000000006c5

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3762 Comm: syz.1.137 Not tainted 6.11.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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