mm/kasan: switch from strlcpy to strscpy

strlcpy is marked as deprecated in Documentation/process/deprecated.rst,
and there is no functional difference when the caller expects truncation
(when not checking the return value).  strscpy is relatively better as it
also avoids scanning the whole source string.

Link: https://lkml.kernel.org/r/1613970647-23272-1-git-send-email-daizhiyuan@phytium.com.cn
Signed-off-by: Zhiyuan Dai <daizhiyuan@phytium.com.cn>
Acked-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c
index de732bc341c5c725f9792abe02df20d6d261e6a0..139615ef326b99bbc58107f3654e5e3ca71551e0 100644 (file)
--- a/mm/kasan/report_generic.c
+++ b/mm/kasan/report_generic.c
@@ -148,7 +148,7 @@ static bool __must_check tokenize_frame_descr(const char **frame_descr,
                }
 
                /* Copy token (+ 1 byte for '\0'). */
-               strlcpy(token, *frame_descr, tok_len + 1);
+               strscpy(token, *frame_descr, tok_len + 1);
        }
 
        /* Advance frame_descr past separator. */