crypto: asym_tpm: correct zero out potential secrets
commit f93274ef0f
upstream.
The function derive_pub_key() should be calling memzero_explicit()
instead of memset() in case the complier decides to optimize away the
call to memset() because it "knows" no one is going to touch the memory
anymore.
Cc: stable <stable@vger.kernel.org>
Reported-by: Ilil Blum Shem-Tov <ilil.blum.shem-tov@intel.com>
Tested-by: Ilil Blum Shem-Tov <ilil.blum.shem-tov@intel.com>
Link: https://lore.kernel.org/r/X8ns4AfwjKudpyfe@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
parent
ff7397add9
commit
867c10a03f
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@ -370,7 +370,7 @@ static uint32_t derive_pub_key(const void *pub_key, uint32_t len, uint8_t *buf)
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memcpy(cur, e, sizeof(e));
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cur += sizeof(e);
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/* Zero parameters to satisfy set_pub_key ABI. */
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memset(cur, 0, SETKEY_PARAMS_SIZE);
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memzero_explicit(cur, SETKEY_PARAMS_SIZE);
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return cur - buf;
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}
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