We can remove parameter checks:
udf_build_ustr_exact() is only called by udf_get_filename()
which now assures dest is not NULL
udf_find_entry() and udf_readdir() call udf_get_filename()
after checking sname
udf_symlink_filler() calls udf_pc_to_char() with sname=kmap(page).
udf_find_entry() and udf_readdir() call udf_get_filename with UDF_NAME_LEN
udf_pc_to_char() with PAGE_SIZE
Suggested-by: Jan Kara <j...@suse.cz>
Signed-off-by: Fabian Frederick <f...@skynet.be>
---
V2: Return -EIO if slen = 0 in udf_get_filename()
(suggested by Jan Kara)
fs/udf/unicode.c | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c
index 4911c1d..e2c079a 100644
--- a/fs/udf/unicode.c
+++ b/fs/udf/unicode.c
@@ -68,17 +68,12 @@ int udf_build_ustr(struct ustr *dest, dstring *ptr, int
size)
/*
* udf_build_ustr_exact
*/
-static int udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize)
+static void udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int
exactsize)
{
- if ((!dest) || (!ptr) || (!exactsize))
- return -1;
-
memset(dest, 0, sizeof(struct ustr));
dest->u_cmpID = ptr[0];
dest->u_len = exactsize - 1;
memcpy(dest->u_name, ptr + 1, exactsize - 1);
-
- return 0;
}
/*
@@ -340,6 +335,9 @@ int udf_get_filename(struct super_block *sb, uint8_t
*sname, int slen,
struct ustr *filename, *unifilename;
int ret = 0;
+ if (!slen)
+ return -EIO;
+
filename = kmalloc(sizeof(struct ustr), GFP_NOFS);
if (!filename)
return -ENOMEM;
@@ -350,9 +348,7 @@ int udf_get_filename(struct super_block *sb, uint8_t
*sname, int slen,
goto out1;
}
- if (udf_build_ustr_exact(unifilename, sname, slen))
- goto out2;
-
+ udf_build_ustr_exact(unifilename, sname, slen);
if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) {
if (!udf_CS0toUTF8(filename, unifilename)) {
udf_debug("Failed in udf_get_filename: sname = %s\n",
--
1.9.1
--
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