Commit 8c81c247 authored by Tadeusz Struk's avatar Tadeusz Struk Committed by Jarkko Sakkinen

tpm: fix use after free in tpm2_load_context()

If load context command returns with TPM2_RC_HANDLE or TPM2_RC_REFERENCE_H0
then we have use after free in line 114 and double free in 117.

Fixes: 4d57856a ("tpm2: add session handle context saving and restoring to the space code")
Cc: stable@vger.kernel.org
Signed-off-by: default avatarTadeusz Struk <tadeusz.struk@intel.com>
Reviewed-by: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off--by: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
parent 59f5a6b0
......@@ -102,8 +102,9 @@ static int tpm2_load_context(struct tpm_chip *chip, u8 *buf,
* TPM_RC_REFERENCE_H0 means the session has been
* flushed outside the space
*/
rc = -ENOENT;
*handle = 0;
tpm_buf_destroy(&tbuf);
return -ENOENT;
} else if (rc > 0) {
dev_warn(&chip->dev, "%s: failed with a TPM error 0x%04X\n",
__func__, rc);
......
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