From 604b8e7558857814bf7c109bc651697129543383 Mon Sep 17 00:00:00 2001 From: Azeem Shaikh Date: Thu, 18 May 2023 04:15:13 +0000 Subject: [PATCH] KEYS: Replace all non-returning strlcpy with strscpy 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 Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen --- 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 */