exfat: fix truncated volume labels returned by FS_IOC_GETFSLABEL

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exfat_ioctl_get_volume_label() passes uniname.name_len to
exfat_utf16_to_nls() as the output buffer length. However, name_len is
the number of UTF-16 code units, while exfat_utf16_to_nls() expects the
buffer size in bytes.

As a result, volume labels that expand during charset conversion are
truncated.The destination buffer is FSLABEL_MAX bytes long, so pass
its actual size to the conversion helper.

Signed-off-by: Yang Wen <anmuxixixi@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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Yang Wen 2026-08-10 22:58:14 +08:00 • committed by Namjae Jeon

parent 0eb24ad05a

commit 27af339219

1 changed files with 1 additions and 1 deletions

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fs/exfat/file.c

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