[PATCH] kcsan: test: Replace deprecated strcpy() with strscpy()

[PATCH] kcsan: test: Replace deprecated strcpy() with strscpy()

[Thorsten Blum]

strcpy() is deprecated; use strscpy() instead.

Link: https://github.com/KSPP/linux/issues/88
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
 kernel/kcsan/kcsan_test.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/kcsan/kcsan_test.c b/kernel/kcsan/kcsan_test.c
index 49ab81faaed9..ea1cb4c8a894 100644
--- a/kernel/kcsan/kcsan_test.c
+++ b/kernel/kcsan/kcsan_test.c
@@ -125,7 +125,7 @@ static void probe_console(void *ignore, const char *buf, size_t len)
 				goto out;
 
 			/* No second line of interest. */
-			strcpy(observed.lines[nlines++], "<none>");
+			strscpy(observed.lines[nlines++], "<none>");
 		}
 	}
 
@@ -231,7 +231,7 @@ static bool __report_matches(const struct expect_report *r)
 
 			if (!r->access[1].fn) {
 				/* Dummy string if no second access is available. */
-				strcpy(cur, "<none>");
+				strscpy(expect[2], "<none>");
 				break;
 			}
 		}
-- 
2.50.1

Re: [PATCH] kcsan: test: Replace deprecated strcpy() with strscpy()

[Justin Stitt]

Hi,

On Fri, Aug 15, 2025 at 11:37:44PM +0200, Thorsten Blum wrote:
> strcpy() is deprecated; use strscpy() instead.
> 
> Link: https://github.com/KSPP/linux/issues/88
> Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
> ---
>  kernel/kcsan/kcsan_test.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/kcsan/kcsan_test.c b/kernel/kcsan/kcsan_test.c
> index 49ab81faaed9..ea1cb4c8a894 100644
> --- a/kernel/kcsan/kcsan_test.c
> +++ b/kernel/kcsan/kcsan_test.c
> @@ -125,7 +125,7 @@ static void probe_console(void *ignore, const char *buf, size_t len)
>  				goto out;
>  
>  			/* No second line of interest. */
> -			strcpy(observed.lines[nlines++], "<none>");
> +			strscpy(observed.lines[nlines++], "<none>");

Looks good.

Here's my checklist:
1) strcpy() and strscpy() have differing return values, but we aren't using
it.
2) strscpy() can fail with -E2BIG if source is too big, but it isn't in
this case.
3) two-arg version of strscpy() is OK to use here as the source has a known
size at compile time.

Reviewed-by: Justin Stitt <justinstitt@google.com>

>  		}
>  	}
>  
> @@ -231,7 +231,7 @@ static bool __report_matches(const struct expect_report *r)
>  
>  			if (!r->access[1].fn) {
>  				/* Dummy string if no second access is available. */
> -				strcpy(cur, "<none>");
> +				strscpy(expect[2], "<none>");
>  				break;
>  			}
>  		}
> -- 
> 2.50.1
> 
>

Thanks
Justin

Re: [PATCH] kcsan: test: Replace deprecated strcpy() with strscpy()

[Thorsten Blum]

On 18. Aug 2025, at 20:26, Justin Stitt wrote:
> Looks good.
> 
> Here's my checklist:
> 1) strcpy() and strscpy() have differing return values, but we aren't using
> it.
> 2) strscpy() can fail with -E2BIG if source is too big, but it isn't in
> this case.
> 3) two-arg version of strscpy() is OK to use here as the source has a known
> size at compile time.
> 
> Reviewed-by: Justin Stitt <justinstitt@google.com>

Thanks for your thorough review.

Thorsten

Re: [PATCH] kcsan: test: Replace deprecated strcpy() with strscpy()

[Marco Elver]

On Fri, 15 Aug 2025 at 23:38, Thorsten Blum <thorsten.blum@linux.dev> wrote:
>
> strcpy() is deprecated; use strscpy() instead.
>
> Link: https://github.com/KSPP/linux/issues/88
> Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>

Reviewed-by: Marco Elver <elver@google.com>

Taking this into the -kcsan tree, but might be a while until it hits mainline.

> ---
>  kernel/kcsan/kcsan_test.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/kernel/kcsan/kcsan_test.c b/kernel/kcsan/kcsan_test.c
> index 49ab81faaed9..ea1cb4c8a894 100644
> --- a/kernel/kcsan/kcsan_test.c
> +++ b/kernel/kcsan/kcsan_test.c
> @@ -125,7 +125,7 @@ static void probe_console(void *ignore, const char *buf, size_t len)
>                                 goto out;
>
>                         /* No second line of interest. */
> -                       strcpy(observed.lines[nlines++], "<none>");
> +                       strscpy(observed.lines[nlines++], "<none>");
>                 }
>         }
>
> @@ -231,7 +231,7 @@ static bool __report_matches(const struct expect_report *r)
>
>                         if (!r->access[1].fn) {
>                                 /* Dummy string if no second access is available. */
> -                               strcpy(cur, "<none>");
> +                               strscpy(expect[2], "<none>");
>                                 break;
>                         }
>                 }
> --
> 2.50.1
>
> --
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