linux-stable.git/lib/strscpy_kunit.c, branch master

string: Merge strscpy KUnit tests into string_kunit.c

2024-04-19T20:11:57+00:00

Move the strscpy() tests into string_kunit.c. Remove the separate
Kconfig and Makefile rule.

Reviewed-by: Andy Shevchenko 
Tested-by: Ivan Orlov 
Link: https://lore.kernel.org/r/20240419140155.3028912-2-keescook@chromium.org
Signed-off-by: Kees Cook

string: Prepare to merge strscpy_kunit.c into string_kunit.c

2024-04-19T20:11:45+00:00

In preparation for moving the strscpy_kunit.c tests into string_kunit.c,
rename "tc" to "strscpy_check" for better readability.

Reviewed-by: Andy Shevchenko 
Tested-by: Ivan Orlov 
Link: https://lore.kernel.org/r/20240419140155.3028912-1-keescook@chromium.org
Signed-off-by: Kees Cook

fortify: Short-circuit known-safe calls to strscpy()

2022-11-01T17:04:52+00:00

Replacing compile-time safe calls of strcpy()-related functions with
strscpy() was always calling the full strscpy() logic when a builtin
would be better. For example:

	char buf[16];
	strcpy(buf, "yes");

would reduce to __builtin_memcpy(buf, "yes", 4), but not if it was:

	strscpy(buf, yes, sizeof(buf));

Fix this by checking if all sizes are known at compile-time.

Cc: linux-hardening@vger.kernel.org
Tested-by: Nathan Chancellor 
Signed-off-by: Kees Cook

string: Convert strscpy() self-test to KUnit

2022-11-01T17:04:52+00:00

Convert the strscpy() self-test to a KUnit test.

Cc: David Gow 
Cc: Tobin C. Harding 
Tested-by: Nathan Chancellor 
Link: https://lore.kernel.org/lkml/Y072ZMk/hNkfwqMv@dev-arch.thelio-3990X
Signed-off-by: Kees Cook