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clocksource: Replace all non-returning strlcpy with strscpy

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strlcpy() reads the entire source buffer first.
This read may exceed the destination size limit.
This is both inefficient and can lead to linear read
overflows if a source string is not NUL-terminated [1].
In an effort to remove strlcpy() completely [2], replace
strlcpy() here with strscpy().
No return values were used, so direct replacement is safe.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89

Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
Acked-by: John Stultz <jstultz@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230530163546.986188-1-azeemshaikh38@gmail.com
This commit is contained in:
Azeem Shaikh 2023-05-30 16:35:46 +00:00 committed by Kees Cook
parent f9cfb1910e
commit 76edc27eda
1 changed files with 1 additions and 1 deletions
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2
kernel/time/clocksource.c
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@ -1480,7 +1480,7 @@ static int __init boot_override_clocksource(char* str)
{
mutex_lock(&clocksource_mutex);
if (str)
strlcpy(override_name, str, sizeof(override_name));
strscpy(override_name, str, sizeof(override_name));
mutex_unlock(&clocksource_mutex);
return 1;
}