[PATCH v3] Staging: exfat: Avoid use of strcpy

Sandro Volery
2019-09-11T12:48:23Z

Use strscpy instead of strcpy in exfat_core.c, and add a check
for length that will return already known FFS_INVALIDPATH.

Suggested-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Sandro Volery <sandro@volery.com>
---
v3: Fixed replacing mistake
v2: Introduced length check
v1: Original patch
drivers/staging/exfat/exfat_core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/exfat/exfat_core.c b/drivers/staging/exfat/exfat_core.c
index da8c58149c35..4c40f1352848 100644
--- a/drivers/staging/exfat/exfat_core.c
+++ b/drivers/staging/exfat/exfat_core.c
@@ -2964,7 +2964,8 @@ s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir,
if (strlen(path) >= (MAX_NAME_LENGTH * MAX_CHARSET_SIZE))
return FFS_INVALIDPATH;

- strcpy(name_buf, path);
+ if (strscpy(name_buf, path, sizeof(name_buf)) < 0)
+ return FFS_INVALIDPATH;

nls_cstring_to_uniname(sb, p_uniname, name_buf, &lossy);
if (lossy)
--
2.23.0