loop0: detected capacity change from 0 to 2048
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BUG: KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range

read-write to 0xffff888106291070 of 8 bytes by task 10559 on cpu 0:
 __filemap_add_folio+0x430/0x6f0 mm/filemap.c:928
 filemap_add_folio+0x9c/0x1b0 mm/filemap.c:980
 page_cache_ra_unbounded+0x1c1/0x350 mm/readahead.c:275
 do_page_cache_ra mm/readahead.c:327 [inline]
 page_cache_ra_order mm/readahead.c:532 [inline]
 page_cache_async_ra+0x41d/0x450 mm/readahead.c:687
 do_async_mmap_readahead mm/filemap.c:3289 [inline]
 filemap_fault+0x2d1/0xb30 mm/filemap.c:3388
 __do_fault+0xb6/0x200 mm/memory.c:4989
 do_read_fault mm/memory.c:5409 [inline]
 do_fault mm/memory.c:5543 [inline]
 do_pte_missing mm/memory.c:4059 [inline]
 handle_pte_fault mm/memory.c:5888 [inline]
 __handle_mm_fault mm/memory.c:6031 [inline]
 handle_mm_fault+0xe98/0x2b00 mm/memory.c:6200
 faultin_page mm/gup.c:1196 [inline]
 __get_user_pages+0xf6a/0x2350 mm/gup.c:1491
 populate_vma_page_range mm/gup.c:1929 [inline]
 __mm_populate+0x25b/0x3b0 mm/gup.c:2032
 mm_populate include/linux/mm.h:3392 [inline]
 vm_mmap_pgoff+0x224/0x2d0 mm/util.c:583
 ksys_mmap_pgoff+0x286/0x330 mm/mmap.c:607
 x64_sys_call+0x1940/0x2dc0 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 0xffff888106291070 of 8 bytes by task 10549 on cpu 1:
 mapping_needs_writeback mm/filemap.c:643 [inline]
 filemap_write_and_wait_range+0x59/0x360 mm/filemap.c:692
 kiocb_write_and_wait+0x73/0x100 mm/filemap.c:2791
 __iomap_dio_rw+0x50c/0x1110 fs/iomap/direct-io.c:624
 iomap_dio_rw+0x40/0x90 fs/iomap/direct-io.c:790
 ext4_dio_read_iter fs/ext4/file.c:94 [inline]
 ext4_file_read_iter+0x214/0x290 fs/ext4/file.c:145
 copy_splice_read+0x383/0x5b0 fs/splice.c:365
 do_splice_read fs/splice.c:984 [inline]
 splice_direct_to_actor+0x28b/0x670 fs/splice.c:1089
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0xd7/0x150 fs/splice.c:1233
 do_sendfile+0x398/0x660 fs/read_write.c:1363
 __do_sys_sendfile64 fs/read_write.c:1424 [inline]
 __se_sys_sendfile64 fs/read_write.c:1410 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1410
 x64_sys_call+0xfbd/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:41
 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: 0x0000000000000b11 -> 0x0000000000000b14

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 10549 Comm: syz.0.2594 Tainted: G        W          6.14.0-rc7-syzkaller-00137-g5fc319360819 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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