From 67638e4043083cdc6f10386a75fef87ba46eecb3 Mon Sep 17 00:00:00 2001 From: OGAWA Hirofumi Date: Sat, 1 Aug 2009 21:30:31 +0900 Subject: fat/nls: Fix handling of utf8 invalid char With utf8 option, vfat allowed the duplicated filenames. Normal nls returns -EINVAL for invalid char. But utf8s_to_utf16s() skipped the invalid char historically. So, this changes the utf8s_to_utf16s() directly to return -EINVAL for invalid char, because vfat is only user of it. mkdir /mnt/fatfs FILENAME=`echo -ne "invalidutf8char_\\0341_endofchar"` echo "Using filename: $FILENAME" dd if=/dev/zero of=fatfs bs=512 count=128 mkdosfs -F 32 fatfs mount -o loop,utf8 fatfs /mnt/fatfs touch "/mnt/fatfs/$FILENAME" umount /mnt/fatfs mount -o loop,utf8 fatfs /mnt/fatfs touch "/mnt/fatfs/$FILENAME" ls -l /mnt/fatfs umount /mnt/fatfs ---- And the output is: Using filename: invalidutf8char_\0341_endofchar 128+0 records in 128+0 records out 65536 bytes (66 kB) copied, 0.000388118 s, 169 MB/s mkdosfs 2.11 (12 Mar 2005) total 0 -rwxr-xr-x 1 root root 0 Jun 28 19:46 invalidutf8char__endofchar -rwxr-xr-x 1 root root 0 Jun 28 19:46 invalidutf8char__endofchar Tested-by: Marton Balint Signed-off-by: OGAWA Hirofumi --- fs/fat/namei_vfat.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) (limited to 'fs/fat') diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index cb6e83557112..f565f24019b5 100644 --- a/fs/fat/namei_vfat.c +++ b/fs/fat/namei_vfat.c @@ -499,17 +499,10 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname, int charlen; if (utf8) { - int name_len = strlen(name); - - *outlen = utf8s_to_utf16s(name, PATH_MAX, (wchar_t *) outname); - - /* - * We stripped '.'s before and set len appropriately, - * but utf8s_to_utf16s doesn't care about len - */ - *outlen -= (name_len - len); - - if (*outlen > 255) + *outlen = utf8s_to_utf16s(name, len, (wchar_t *)outname); + if (*outlen < 0) + return *outlen; + else if (*outlen > 255) return -ENAMETOOLONG; op = &outname[*outlen * sizeof(wchar_t)]; -- cgit v1.2.3