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| author | Keith Mok <ek9852@gmail.com> | 2008-04-28 02:16:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-28 08:58:47 -0700 |
| commit | f22032ba8de2960a64a3dd9719fb5c99b1f1ae6e (patch) | |
| tree | c515ff4c94c041325cede8061a9fe3301ec08e53 /fs/vfat | |
| parent | 061e97469f46f924cf14bbf1dd4805b46986691a (diff) | |
| download | linux-f22032ba8de2960a64a3dd9719fb5c99b1f1ae6e.tar.gz linux-f22032ba8de2960a64a3dd9719fb5c99b1f1ae6e.tar.xz | |
vfat: bug fix for vfat cannot handle filename with 255
This patch fix the problem that the buffer allocated for convert of unicode to
utf8 in fat/dir.c is too small.
And cannot handle filename with 255 asian characters when mounted with utf8
options.
Also it fix the filename length limitation checking in vfat/namei.c that the
filename length should be checked against the number of converted unicode
characters.
Not the length before NLS/UTF8 converted.
Signed-off-by: Keith Mok <ek9852@gmail.com>
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/vfat')
| -rw-r--r-- | fs/vfat/namei.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/fs/vfat/namei.c b/fs/vfat/namei.c index efc70576e4b4..ab4f3da770f0 100644 --- a/fs/vfat/namei.c +++ b/fs/vfat/namei.c @@ -176,15 +176,10 @@ static inline int vfat_is_used_badchars(const wchar_t *s, int len) for (i = 0; i < len; i++) if (vfat_bad_char(s[i])) return -EINVAL; - return 0; -} -static int vfat_valid_longname(const unsigned char *name, unsigned int len) -{ - if (name[len - 1] == ' ') + if (s[i - 1] == ' ') /* last character cannot be space */ return -EINVAL; - if (len >= 256) - return -ENAMETOOLONG; + return 0; } @@ -485,11 +480,14 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname, */ *outlen -= (name_len - len); + if (*outlen > 255) + return -ENAMETOOLONG; + op = &outname[*outlen * sizeof(wchar_t)]; } else { if (nls) { for (i = 0, ip = name, op = outname, *outlen = 0; - i < len && *outlen <= 260; + i < len && *outlen <= 255; *outlen += 1) { if (escape && (*ip == ':')) { @@ -525,18 +523,20 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname, op += 2; } } + if (i < len) + return -ENAMETOOLONG; } else { for (i = 0, ip = name, op = outname, *outlen = 0; - i < len && *outlen <= 260; + i < len && *outlen <= 255; i++, *outlen += 1) { *op++ = *ip++; *op++ = 0; } + if (i < len) + return -ENAMETOOLONG; } } - if (*outlen > 260) - return -ENAMETOOLONG; *longlen = *outlen; if (*outlen % 13) { @@ -574,9 +574,6 @@ static int vfat_build_slots(struct inode *dir, const unsigned char *name, loff_t offset; *nr_slots = 0; - err = vfat_valid_longname(name, len); - if (err) - return err; page = __get_free_page(GFP_KERNEL); if (!page) |