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BUG: KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range

read-write to 0xffff888100632af0 of 8 bytes by task 27170 on cpu 0:
 __filemap_add_folio+0x430/0x6f0 mm/filemap.c:911
 filemap_add_folio+0x9c/0x1b0 mm/filemap.c:963
 __filemap_get_folio+0x2f1/0x5b0 mm/filemap.c:1951
 grow_dev_folio fs/buffer.c:1039 [inline]
 grow_buffers fs/buffer.c:1105 [inline]
 __getblk_slow fs/buffer.c:1131 [inline]
 bdev_getblk+0x173/0x3b0 fs/buffer.c:1431
 sb_getblk_gfp include/linux/buffer_head.h:392 [inline]
 __ext4_sb_bread_gfp+0x46/0x180 fs/ext4/super.c:237
 ext4_sb_bread_unmovable fs/ext4/super.c:266 [inline]
 ext4_load_super fs/ext4/super.c:5044 [inline]
 __ext4_fill_super fs/ext4/super.c:5248 [inline]
 ext4_fill_super+0x460/0x3650 fs/ext4/super.c:5722
 get_tree_bdev_flags+0x29f/0x310 fs/super.c:1636
 get_tree_bdev+0x1f/0x30 fs/super.c:1659
 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5754
 vfs_get_tree+0x56/0x1e0 fs/super.c:1814
 do_new_mount+0x227/0x690 fs/namespace.c:3560
 path_mount+0x49b/0xb30 fs/namespace.c:3887
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x27f/0x2d0 fs/namespace.c:4088
 __x64_sys_mount+0x67/0x80 fs/namespace.c:4088
 x64_sys_call+0x2c84/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:166
 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 0xffff888100632af0 of 8 bytes by task 2999 on cpu 1:
 mapping_needs_writeback mm/filemap.c:626 [inline]
 filemap_write_and_wait_range+0x59/0x360 mm/filemap.c:675
 filemap_write_and_wait include/linux/pagemap.h:68 [inline]
 sync_blockdev block/bdev.c:218 [inline]
 bdev_release+0xea/0x420 block/bdev.c:1084
 blkdev_release+0x15/0x20 block/fops.c:660
 __fput+0x2ac/0x640 fs/file_table.c:450
 __fput_sync+0x96/0xc0 fs/file_table.c:536
 __do_sys_close fs/open.c:1579 [inline]
 __se_sys_close+0x109/0x1b0 fs/open.c:1564
 __x64_sys_close+0x1f/0x30 fs/open.c:1564
 x64_sys_call+0x266c/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:4
 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: 0x0000000000000000 -> 0x0000000000000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 2999 Comm: udevd Not tainted 6.13.0-syzkaller-07632-gaa22f4da2a46 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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