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exfat: fix name_hash computation on big endian systems

Browse source 
On-disk format for name_hash field is LE, so it must be explicitly
transformed on BE system for proper result.

Fixes: 370e812b3ec1 ("exfat: add nls operations")
Cc: stable@vger.kernel.org # v5.7
Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
Signed-off-by: Ilya Ponetayev <i.ponetaev@ndmsystems.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Git-commit: db415f7aae07cadcabd5d2a659f8ad825c905299
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Signed-off-by: lixiang <lixiang@codeaurora.org>
This commit is contained in:
Ilya Ponetayev 2021-02-10 15:46:19 +08:00 • committed by lixiang
commit 0adf73c46b
1 changed files with 4 additions and 4 deletions
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8
fs/exfat/nls.c
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@ -495,7 +495,7 @@ static int exfat_utf8_to_utf16(struct super_block *sb,
struct exfat_uni_name *p_uniname, int *p_lossy)
{
int i, unilen, lossy = NLS_NAME_NO_LOSSY;
unsigned short upname[MAX_NAME_LENGTH + 1];
__le16 upname[MAX_NAME_LENGTH + 1];
unsigned short *uniname = p_uniname->name;
WARN_ON(!len);
@ -519,7 +519,7 @@ static int exfat_utf8_to_utf16(struct super_block *sb,
exfat_wstrchr(bad_uni_chars, *uniname))
lossy |= NLS_NAME_LOSSY;
upname[i] = exfat_toupper(sb, *uniname);
upname[i] = cpu_to_le16(exfat_toupper(sb, *uniname));
uniname++;
}
@ -597,7 +597,7 @@ static int exfat_nls_to_ucs2(struct super_block *sb,
struct exfat_uni_name *p_uniname, int *p_lossy)
{
int i = 0, unilen = 0, lossy = NLS_NAME_NO_LOSSY;
unsigned short upname[MAX_NAME_LENGTH + 1];
__le16 upname[MAX_NAME_LENGTH + 1];
unsigned short *uniname = p_uniname->name;
struct nls_table *nls = EXFAT_SB(sb)->nls_io;
@ -611,7 +611,7 @@ static int exfat_nls_to_ucs2(struct super_block *sb,
exfat_wstrchr(bad_uni_chars, *uniname))
lossy |= NLS_NAME_LOSSY;
upname[unilen] = exfat_toupper(sb, *uniname);
upname[unilen] = cpu_to_le16(exfat_toupper(sb, *uniname));
uniname++;
unilen++;
}