Messages in this thread | | | Date | Thu, 18 May 2023 21:01:01 +0300 | Subject | Re: [PATCH] KEYS: Replace all non-returning strlcpy with strscpy | From | "Jarkko Sakkinen" <> |
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On Thu May 18, 2023 at 7:15 AM EEST, Azeem Shaikh wrote: > 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> > --- > security/keys/request_key_auth.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/security/keys/request_key_auth.c b/security/keys/request_key_auth.c > index 41e9735006d0..8f33cd170e42 100644 > --- a/security/keys/request_key_auth.c > +++ b/security/keys/request_key_auth.c > @@ -178,7 +178,7 @@ struct key *request_key_auth_new(struct key *target, const char *op, > if (!rka->callout_info) > goto error_free_rka; > rka->callout_len = callout_len; > - strlcpy(rka->op, op, sizeof(rka->op)); > + strscpy(rka->op, op, sizeof(rka->op)); > > /* see if the calling process is already servicing the key request of > * another process */
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
BR, Jarkko
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