linux-kernel - [PATCH v4] scsi: target: transform strncpy into strscpy

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Message-Id: <20250405143646.10722-1-goralbaris@gmail.com>
Date: Sat,  5 Apr 2025 17:36:47 +0300
From: Baris Can Goral <goralbaris@...il.com>
To: martin.petersen@...cle.com
Cc: linux-scsi@...r.kernel.org,
	target-devel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	skhan@...uxfoundation.org,
	linux-kernel-mentees@...ts.linux.dev,
	Baris Can Goral <goralbaris@...il.com>
Subject: [PATCH v4] scsi: target: transform strncpy into strscpy

The strncpy() function is actively dangerous to use since it may not
NULL-terminate the destination string,resulting in potential memory
content exposures, unbounded reads, or crashes.

Link:https://github.com/KSPP/linux/issues/90
Signed-off-by: Baris Can Goral <goralbaris@...il.com>
---
Changes from v4:
	-Description added
	-User name corrected
	-formatting issues.
	-commit name changed
 drivers/target/target_core_configfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index c40217f44b1b..5c0b74e76be2 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -143,7 +143,7 @@ static ssize_t target_core_item_dbroot_store(struct config_item *item,
 	}
 	filp_close(fp, NULL);
 
-	strncpy(db_root, db_root_stage, read_bytes);
+	strscpy(db_root, db_root_stage, read_bytes);
 	pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
 
 	r = read_bytes;
@@ -3664,7 +3664,7 @@ static void target_init_dbroot(void)
 	}
 	filp_close(fp, NULL);
 
-	strncpy(db_root, db_root_stage, DB_ROOT_LEN);
+	strscpy(db_root, db_root_stage, DB_ROOT_LEN);
 	pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
 }
 
-- 
2.34.1