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: 4d57856a21
("tpm2: add session handle context saving and restoring to the space code")
Cc: stable@vger.kernel.org
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off--by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
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@ -102,8 +102,9 @@ static int tpm2_load_context(struct tpm_chip *chip, u8 *buf,
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* TPM_RC_REFERENCE_H0 means the session has been
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* flushed outside the space
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*/
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rc = -ENOENT;
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*handle = 0;
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tpm_buf_destroy(&tbuf);
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return -ENOENT;
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} else if (rc > 0) {
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dev_warn(&chip->dev, "%s: failed with a TPM error 0x%04X\n",
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__func__, rc);
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