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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-04 09:01:36 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-31 10:48:53 +0100 |
| commit | f93274ef0fe972c120c96b3207f8fce376231a60 (patch) | |
| tree | 6153831daa0d136ce15fdcd0df0ee425ea5423db | |
| parent | 0acfbe9ce46925ac92f6e27d0e273297e57c633c (diff) | |
| download | linux-f93274ef0fe972c120c96b3207f8fce376231a60.tar.bz2 | |
crypto: asym_tpm: correct zero out potential secrets
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/X8ns4AfwjKudpyfe@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | crypto/asymmetric_keys/asym_tpm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/asymmetric_keys/asym_tpm.c b/crypto/asymmetric_keys/asym_tpm.c index 511932aa94a6..0959613560b9 100644 --- a/crypto/asymmetric_keys/asym_tpm.c +++ b/crypto/asymmetric_keys/asym_tpm.c @@ -354,7 +354,7 @@ static uint32_t derive_pub_key(const void *pub_key, uint32_t len, uint8_t *buf) memcpy(cur, e, sizeof(e)); cur += sizeof(e); /* Zero parameters to satisfy set_pub_key ABI. */ - memset(cur, 0, SETKEY_PARAMS_SIZE); + memzero_explicit(cur, SETKEY_PARAMS_SIZE); return cur - buf; } |