Clear the hmac_sha1_ctx structure via __cleanup(hmac_sha1_zeroize_ctx) to make sure that the function does not leak sensitive data on the stack when returning without calling hmac_sha1_final().
Reviewed-by: Jarkko Sakkinen <[email protected]> Signed-off-by: Thomas Huth <[email protected]> --- security/keys/trusted-keys/trusted_tpm1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/security/keys/trusted-keys/trusted_tpm1.c b/security/keys/trusted-keys/trusted_tpm1.c index bf0bf7f369705..e5a904b5c1946 100644 --- a/security/keys/trusted-keys/trusted_tpm1.c +++ b/security/keys/trusted-keys/trusted_tpm1.c @@ -101,7 +101,7 @@ static inline void dump_tpm_buf(unsigned char *buf) static int TSS_rawhmac(unsigned char *digest, const unsigned char *key, unsigned int keylen, ...) { - struct hmac_sha1_ctx hmac_ctx; + struct hmac_sha1_ctx hmac_ctx __cleanup(hmac_sha1_zeroize_ctx); va_list argp; unsigned int dlen; unsigned char *data; -- 2.55.0
