Detections
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CVE-2021-46922
medium
Description
In the Linux kernel, the following vulnerability has been resolved: KEYS: trusted: Fix TPM reservation for seal/unseal The original patch 8c657a0590de ("KEYS: trusted: Reserve TPM for seal and unseal operations") was correct on the mailing list: https://lore.kernel.org/linux-integrity/[email protected]/ But somehow got rebased so that the tpm_try_get_ops() in tpm2_seal_trusted() got lost. This causes an imbalanced put of the TPM ops and causes oopses on TIS based hardware. This fix puts back the lost tpm_try_get_ops()
References
https://git.kernel.org/stable/c/bf84ef2dd2ccdcd8f2658476d34b51455f970ce4
https://git.kernel.org/stable/c/bf84ef2dd2ccdcd8f2658476d34b51455f970ce4
https://git.kernel.org/stable/c/9d5171eab462a63e2fbebfccf6026e92be018f20
https://git.kernel.org/stable/c/9d5171eab462a63e2fbebfccf6026e92be018f20
https://git.kernel.org/stable/c/39c8d760d44cb3fa0d67e8cd505df81cf4d80999
https://git.kernel.org/stable/c/39c8d760d44cb3fa0d67e8cd505df81cf4d80999