lkml.org 
[lkml]   [2021]   [Dec]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] hexagon: use strscpy to copy strings
Date
The strlcpy should not be used because it doesn't limit the source
length. So that it will lead some potential bugs.

But the strscpy doesn't require reading memory from the src string
beyond the specified "count" bytes, and since the return value is
easier to error-check than strlcpy()'s. In addition, the implementation
is robust to the string changing out from underneath it, unlike the
current strlcpy() implementation.

Thus, replace strlcpy with strscpy.

Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
---
arch/hexagon/kernel/setup.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/hexagon/kernel/setup.c b/arch/hexagon/kernel/setup.c
index 1880d9beaf2b..621674e86232 100644
--- a/arch/hexagon/kernel/setup.c
+++ b/arch/hexagon/kernel/setup.c
@@ -66,9 +66,9 @@ void __init setup_arch(char **cmdline_p)
on_simulator = 0;

if (p[0] != '\0')
- strlcpy(boot_command_line, p, COMMAND_LINE_SIZE);
+ strscpy(boot_command_line, p, COMMAND_LINE_SIZE);
else
- strlcpy(boot_command_line, default_command_line,
+ strscpy(boot_command_line, default_command_line,
COMMAND_LINE_SIZE);

/*
@@ -76,7 +76,7 @@ void __init setup_arch(char **cmdline_p)
* are both picked up by the init code. If no reason to
* make them different, pass the same pointer back.
*/
- strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
+ strscpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
*cmdline_p = cmd_line;

parse_early_param();
--
2.34.1
\
 
 \ /
  Last update: 2021-12-20 09:51    [W:0.085 / U:23.292 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site