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BUG: KCSAN: data-race in xas_find_marked / xas_init_marks

read-write to 0xffff88810809eb58 of 8 bytes by task 14491 on cpu 1:
 instrument_read_write include/linux/instrumented.h:55 [inline]
 __instrument_read_write_bitop include/asm-generic/bitops/instrumented-non-atomic.h:84 [inline]
 ___test_and_clear_bit include/asm-generic/bitops/instrumented-non-atomic.h:114 [inline]
 node_clear_mark lib/xarray.c:102 [inline]
 xas_clear_mark lib/xarray.c:915 [inline]
 xas_init_marks+0x17e/0x320 lib/xarray.c:948
 xas_store+0x213/0xc90 lib/xarray.c:810
 page_cache_delete_batch mm/filemap.c:321 [inline]
 delete_from_page_cache_batch+0x31d/0x710 mm/filemap.c:343
 truncate_inode_pages_range+0x1c5/0x6b0 mm/truncate.c:359
 truncate_pagecache_range+0x84/0xa0 mm/truncate.c:844
 ext4_punch_hole+0x354/0x7e0 fs/ext4/inode.c:3953
 ext4_fallocate+0x209/0x1190 fs/ext4/extents.c:4742
 vfs_fallocate+0x380/0x3e0 fs/open.c:330
 madvise_remove mm/madvise.c:1012 [inline]
 madvise_vma_behavior mm/madvise.c:1036 [inline]
 madvise_walk_vmas mm/madvise.c:1268 [inline]
 do_madvise+0x11a5/0x2610 mm/madvise.c:1464
 __do_sys_madvise mm/madvise.c:1481 [inline]
 __se_sys_madvise mm/madvise.c:1479 [inline]
 __x64_sys_madvise+0x61/0x70 mm/madvise.c:1479
 x64_sys_call+0x285d/0x2d70 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

read to 0xffff88810809eb58 of 8 bytes by task 14493 on cpu 0:
 xas_find_chunk include/linux/xarray.h:1733 [inline]
 xas_find_marked+0x216/0x660 lib/xarray.c:1370
 find_get_entry+0x5d/0x290 mm/filemap.c:1992
 filemap_get_folios_tag+0x9e/0x210 mm/filemap.c:2242
 mpage_prepare_extent_to_map+0x329/0xb80 fs/ext4/inode.c:2392
 ext4_do_writepages+0x6ea/0x2110 fs/ext4/inode.c:2632
 ext4_writepages+0x159/0x2e0 fs/ext4/inode.c:2768
 do_writepages+0x1d8/0x480 mm/page-writeback.c:2634
 filemap_fdatawrite_wbc+0xdb/0x100 mm/filemap.c:397
 __filemap_fdatawrite_range mm/filemap.c:430 [inline]
 filemap_write_and_wait_range+0xb6/0x1f0 mm/filemap.c:685
 ext4_punch_hole+0xc5/0x7e0 fs/ext4/inode.c:3886
 ext4_fallocate+0x209/0x1190 fs/ext4/extents.c:4742
 vfs_fallocate+0x380/0x3e0 fs/open.c:330
 madvise_remove mm/madvise.c:1012 [inline]
 madvise_vma_behavior mm/madvise.c:1036 [inline]
 madvise_walk_vmas mm/madvise.c:1268 [inline]
 do_madvise+0x11a5/0x2610 mm/madvise.c:1464
 __do_sys_madvise mm/madvise.c:1481 [inline]
 __se_sys_madvise mm/madvise.c:1479 [inline]
 __x64_sys_madvise+0x61/0x70 mm/madvise.c:1479
 x64_sys_call+0x285d/0x2d70 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: 0xffffffffffc00000 -> 0xffffffffe0000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14493 Comm: syz.3.3382 Tainted: G        W          6.10.0-rc5-syzkaller-00243-g6c0483dbfe72 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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