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* [PATCH] tty: move from strlcpy with unused retval to strscpy
@ 2022-08-18 21:01 Wolfram Sang
  2022-08-30  7:23 ` Jiri Slaby
  0 siblings, 1 reply; 2+ messages in thread
From: Wolfram Sang @ 2022-08-18 21:01 UTC (permalink / raw)
  To: linux-kernel
  Cc: Jiri Slaby, Wolfram Sang, linux-serial, Greg Kroah-Hartman,
	sparclinux, linuxppc-dev, David S. Miller

Follow the advice of the below link and prefer 'strscpy' in this
subsystem. Conversion is 1:1 because the return value is not used.
Generated by a coccinelle script.

Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 drivers/tty/hvc/hvcs.c           | 2 +-
 drivers/tty/serial/earlycon.c    | 6 +++---
 drivers/tty/serial/serial_core.c | 2 +-
 drivers/tty/serial/sunsu.c       | 6 +++---
 drivers/tty/serial/sunzilog.c    | 6 +++---
 5 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c
index 9b7e8246a464..b79ce8d34f11 100644
--- a/drivers/tty/hvc/hvcs.c
+++ b/drivers/tty/hvc/hvcs.c
@@ -839,7 +839,7 @@ static void hvcs_set_pi(struct hvcs_partner_info *pi, struct hvcs_struct *hvcsd)
 	hvcsd->p_partition_ID  = pi->partition_ID;
 
 	/* copy the null-term char too */
-	strlcpy(hvcsd->p_location_code, pi->location_code,
+	strscpy(hvcsd->p_location_code, pi->location_code,
 		sizeof(hvcsd->p_location_code));
 }
 
diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index 88d08ba1ca83..a5f380584cda 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -67,7 +67,7 @@ static void __init earlycon_init(struct earlycon_device *device,
 	if (*s)
 		earlycon->index = simple_strtoul(s, NULL, 10);
 	len = s - name;
-	strlcpy(earlycon->name, name, min(len + 1, sizeof(earlycon->name)));
+	strscpy(earlycon->name, name, min(len + 1, sizeof(earlycon->name)));
 	earlycon->data = &early_console_dev;
 }
 
@@ -123,7 +123,7 @@ static int __init parse_options(struct earlycon_device *device, char *options)
 		device->baud = simple_strtoul(options, NULL, 0);
 		length = min(strcspn(options, " ") + 1,
 			     (size_t)(sizeof(device->options)));
-		strlcpy(device->options, options, length);
+		strscpy(device->options, options, length);
 	}
 
 	return 0;
@@ -304,7 +304,7 @@ int __init of_setup_earlycon(const struct earlycon_id *match,
 
 	if (options) {
 		early_console_dev.baud = simple_strtoul(options, NULL, 0);
-		strlcpy(early_console_dev.options, options,
+		strscpy(early_console_dev.options, options,
 			sizeof(early_console_dev.options));
 	}
 	earlycon_init(&early_console_dev, match->name);
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 12c87cd201a7..3561a160cbd5 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2497,7 +2497,7 @@ uart_report_port(struct uart_driver *drv, struct uart_port *port)
 			 "MMIO 0x%llx", (unsigned long long)port->mapbase);
 		break;
 	default:
-		strlcpy(address, "*unknown*", sizeof(address));
+		strscpy(address, "*unknown*", sizeof(address));
 		break;
 	}
 
diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c
index 84d545e5a8c7..d5dcb612804e 100644
--- a/drivers/tty/serial/sunsu.c
+++ b/drivers/tty/serial/sunsu.c
@@ -1217,13 +1217,13 @@ static int sunsu_kbd_ms_init(struct uart_sunsu_port *up)
 	serio->id.type = SERIO_RS232;
 	if (up->su_type == SU_PORT_KBD) {
 		serio->id.proto = SERIO_SUNKBD;
-		strlcpy(serio->name, "sukbd", sizeof(serio->name));
+		strscpy(serio->name, "sukbd", sizeof(serio->name));
 	} else {
 		serio->id.proto = SERIO_SUN;
 		serio->id.extra = 1;
-		strlcpy(serio->name, "sums", sizeof(serio->name));
+		strscpy(serio->name, "sums", sizeof(serio->name));
 	}
-	strlcpy(serio->phys,
+	strscpy(serio->phys,
 		(!(up->port.line & 1) ? "su/serio0" : "su/serio1"),
 		sizeof(serio->phys));
 
diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c
index c14275d83b0b..c44cf613ff1a 100644
--- a/drivers/tty/serial/sunzilog.c
+++ b/drivers/tty/serial/sunzilog.c
@@ -1307,13 +1307,13 @@ static void sunzilog_register_serio(struct uart_sunzilog_port *up)
 	serio->id.type = SERIO_RS232;
 	if (up->flags & SUNZILOG_FLAG_CONS_KEYB) {
 		serio->id.proto = SERIO_SUNKBD;
-		strlcpy(serio->name, "zskbd", sizeof(serio->name));
+		strscpy(serio->name, "zskbd", sizeof(serio->name));
 	} else {
 		serio->id.proto = SERIO_SUN;
 		serio->id.extra = 1;
-		strlcpy(serio->name, "zsms", sizeof(serio->name));
+		strscpy(serio->name, "zsms", sizeof(serio->name));
 	}
-	strlcpy(serio->phys,
+	strscpy(serio->phys,
 		((up->flags & SUNZILOG_FLAG_CONS_KEYB) ?
 		 "zs/serio0" : "zs/serio1"),
 		sizeof(serio->phys));
-- 
2.35.1


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2022-08-18 21:01 [PATCH] tty: move from strlcpy with unused retval to strscpy Wolfram Sang
2022-08-30  7:23 ` Jiri Slaby

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