Commit db415f7a authored by Ilya Ponetayev's avatar Ilya Ponetayev Committed by Namjae Jeon
Browse files

exfat: fix name_hash computation on big endian systems 



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

Fixes: 370e812b ("exfat: add nls operations")
Cc: stable@vger.kernel.org # v5.7
Signed-off-by: default avatarChen Minqiang <ptpt52@gmail.com>
Signed-off-by: default avatarIlya Ponetayev <i.ponetaev@ndmsystems.com>
Reviewed-by: default avatarSungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: default avatarNamjae Jeon <namjae.jeon@samsung.com>
parent 41e3928f

fs/exfat/nls.c

+4 −4
Original line number Diff line number Diff line
@@ -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++;

	}

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