[PATCH next] drivers/misc/enclosure: Replace strcpy() + strcat() with snprintf()

[PATCH next] drivers/misc/enclosure: Replace strcpy() + strcat() with snprintf()

[david.laight.linux]

From: David Laight <david.laight.linux@gmail.com>

While the sizeof the target buffer is (should be) ENCLOSURE_NAME_SIZE
and the copies should not overrrun this stops any static analysis objecting
to the unbounded strcpy() and strcat() calls

Signed-off-by: David Laight <david.laight.linux@gmail.com>
---
This is one of a group of patches that remove potentially unbounded
strcpy() calls.

They are mostly replaced by strscpy() or, when strlen() has just been
called, with memcpy() (usually including the '\0').

Calls with copy string literals into arrays are left unchanged.
They are safe and easily detected as such.

The changes were made by getting the compiler to detect the calls and
then fixing the code by hand.

Note that all the changes are only compile tested.

Some Makefiles were changed to allow files to contain strcpy().
As well as 'difficult to fix' files, this included 'show' functions
as they really need to use sysfs_emit() or seq_printf().

All the patches are being sent individually to avoid very long cc lists.
Apologies for the terse commit messages and likely unexpected tags.
(There are about 100 patches in total.)

 drivers/misc/enclosure.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/enclosure.c b/drivers/misc/enclosure.c
index cf6382981777..de457378c501 100644
--- a/drivers/misc/enclosure.c
+++ b/drivers/misc/enclosure.c
@@ -184,8 +184,8 @@ EXPORT_SYMBOL_GPL(enclosure_unregister);
 
 static void enclosure_link_name(struct enclosure_component *cdev, char *name)
 {
-	strcpy(name, "enclosure_device:");
-	strcat(name, dev_name(&cdev->cdev));
+	snprintf(name, ENCLOSURE_NAME_SIZE, "enclosure_device:%s",
+		 dev_name(&cdev->cdev));
 }
 
 static void enclosure_remove_links(struct enclosure_component *cdev)
-- 
2.39.5