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authorFabian Frederick <fabf@skynet.be>2015-04-08 21:23:57 +0200
committerJan Kara <jack@suse.cz>2015-05-18 11:23:06 +0200
commit6ce638367382ea8015cf64619e9bca4e207ef36f (patch)
treeeb5b4c45bd2078e8a53994b6237a9969cd5c2c57
parent5dce54b71e6185dae07ad12ca17ce30aa64022cd (diff)
udf: Make udf_get_filename() return error instead of 0 length file name
Zero length file name isn't really valid. So check the length of the final file name generated by udf_translate_to_linux() and return -EINVAL instead of zero length file name. Update caller of udf_get_filename() to not check for 0 return value. Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Jan Kara <jack@suse.cz>
-rw-r--r--fs/udf/dir.c2
-rw-r--r--fs/udf/unicode.c5
2 files changed, 5 insertions, 2 deletions
diff --git a/fs/udf/dir.c b/fs/udf/dir.c
index fcf227eb2c51..541d9c65014d 100644
--- a/fs/udf/dir.c
+++ b/fs/udf/dir.c
@@ -168,7 +168,7 @@ static int udf_readdir(struct file *file, struct dir_context *ctx)
}
flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN);
- if (flen <= 0)
+ if (flen < 0)
continue;
tloc = lelb_to_cpu(cfi.icb.extLocation);
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c
index 97b23b0f9713..ab478e62baae 100644
--- a/fs/udf/unicode.c
+++ b/fs/udf/unicode.c
@@ -333,7 +333,7 @@ int udf_get_filename(struct super_block *sb, uint8_t *sname, int slen,
uint8_t *dname, int dlen)
{
struct ustr *filename, *unifilename;
- int ret = 0;
+ int ret;
if (!slen)
return -EIO;
@@ -370,6 +370,9 @@ int udf_get_filename(struct super_block *sb, uint8_t *sname, int slen,
ret = udf_translate_to_linux(dname, dlen,
filename->u_name, filename->u_len,
unifilename->u_name, unifilename->u_len);
+ /* Zero length filename isn't valid... */
+ if (ret == 0)
+ ret = -EINVAL;
out2:
kfree(unifilename);
out1: