[PATCH] udf: use strscpy() instead of strcpy() for regid ident field

[Mahad Ibrahim <mahad.ibrahim.dev@gmail.com>]

strcpy() is deprecated as it performs no bounds checking. Replace the
three call sites that copy UDF_ID_DEVELOPER into the regid ident field
with strscpy().

The current string fits the field with room to spare, so there is no
overflow today. strscpy() bounds the copy to the destination and
NUL-terminates, keeping it safe if the string or the field size
changes later.

Signed-off-by: Mahad Ibrahim <mahad.ibrahim.dev@gmail.com>
---
 fs/udf/inode.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 67bcf83758c8..3140e001b315 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1809,7 +1809,7 @@ static int udf_update_inode(struct inode *inode, int do_sync)
 		}
 		eid = (struct regid *)dsea->impUse;
 		memset(eid, 0, sizeof(*eid));
-		strcpy(eid->ident, UDF_ID_DEVELOPER);
+		strscpy(eid->ident, UDF_ID_DEVELOPER, sizeof(eid->ident));
 		eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
 		eid->identSuffix[1] = UDF_OS_ID_LINUX;
 		dsea->majorDeviceIdent = cpu_to_le32(imajor(inode));
@@ -1833,7 +1833,7 @@ static int udf_update_inode(struct inode *inode, int do_sync)
 		udf_time_to_disk_stamp(&fe->modificationTime, inode_get_mtime(inode));
 		udf_time_to_disk_stamp(&fe->attrTime, inode_get_ctime(inode));
 		memset(&(fe->impIdent), 0, sizeof(struct regid));
-		strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
+		strscpy(fe->impIdent.ident, UDF_ID_DEVELOPER, sizeof(fe->impIdent.ident));
 		fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
 		fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
 		fe->uniqueID = cpu_to_le64(iinfo->i_unique);
@@ -1872,7 +1872,7 @@ static int udf_update_inode(struct inode *inode, int do_sync)
 		udf_time_to_disk_stamp(&efe->attrTime, inode_get_ctime(inode));
 
 		memset(&(efe->impIdent), 0, sizeof(efe->impIdent));
-		strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
+		strscpy(efe->impIdent.ident, UDF_ID_DEVELOPER, sizeof(efe->impIdent.ident));
 		efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
 		efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
 		efe->uniqueID = cpu_to_le64(iinfo->i_unique);
-- 
2.54.0