linux-kernel - [PATCH v2 10/35] macintosh: Use kmemdup rather than duplicating its implementation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:   Thu,  4 Jul 2019 00:28:21 +0800
From:   Fuqian Huang <huangfq.daxian@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Fuqian Huang <huangfq.daxian@...il.com>
Subject: [PATCH v2 10/35] macintosh: Use kmemdup rather than duplicating its implementation

kmemdup is introduced to duplicate a region of memory in a neat way.
Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
write the size twice (sometimes lead to mistakes), kmemdup improves
readability, leads to smaller code and also reduce the chances of mistakes.
Suggestion to use kmemdup rather than using kmalloc/kzalloc + memcpy.

Signed-off-by: Fuqian Huang <huangfq.daxian@...il.com>
---
Changes in v2:
  - Fix a typo in commit message (memset -> memcpy)

 drivers/macintosh/adbhid.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/macintosh/adbhid.c b/drivers/macintosh/adbhid.c
index 75482eeab2c4..5d14bebfb58f 100644
--- a/drivers/macintosh/adbhid.c
+++ b/drivers/macintosh/adbhid.c
@@ -789,7 +789,8 @@ adbhid_input_register(int id, int default_id, int original_handler_id,
 
 	switch (default_id) {
 	case ADB_KEYBOARD:
-		hid->keycode = kmalloc(sizeof(adb_to_linux_keycodes), GFP_KERNEL);
+		hid->keycode = kmemdup(adb_to_linux_keycodes,
+			sizeof(adb_to_linux_keycodes), GFP_KERNEL);
 		if (!hid->keycode) {
 			err = -ENOMEM;
 			goto fail;
@@ -797,8 +798,6 @@ adbhid_input_register(int id, int default_id, int original_handler_id,
 
 		sprintf(hid->name, "ADB keyboard");
 
-		memcpy(hid->keycode, adb_to_linux_keycodes, sizeof(adb_to_linux_keycodes));
-
 		switch (original_handler_id) {
 		default:
 			keyboard_type = "<unknown>";
-- 
2.11.0