Re: [PATCH 2/2] fat: Fix bug in enforcing Long File Name length.

[OGAWA Hirofumi]

Namjae Jeon <linkinjeon@xxxxxxxxx> writes:

>  Since '*outlen' is initialized to zero,it is currently possible to create a f ilename of length (FAT_LFN_LEN +1) when utf8 is not enabled.To enforce the FA T_LFN_LEN limit, we must perform one less iteration.

Acked-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>

> Signed-off-by: Namjae Jeon <linkinjeon@xxxxxxxxx>
> Signed-off-by: Ravishankar N <cyberax82@xxxxxxxxx>
> ---
>  fs/fat/namei_vfat.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
> index aae3b4e..98ae804 100644
> --- a/fs/fat/namei_vfat.c
> +++ b/fs/fat/namei_vfat.c
> @@ -522,7 +522,7 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname,
>  		op = &outname[*outlen * sizeof(wchar_t)];
>  	} else {
>  		for (i = 0, ip = name, op = outname, *outlen = 0;
> -			 i < len && *outlen <= FAT_LFN_LEN;
> +			 i < len && *outlen < FAT_LFN_LEN;
>  			 *outlen += 1) {
>  			if (escape && (*ip == ':')) {
>  				if (i > len - 5)

-- 
OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
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