CVE-2022-49286: tpm: use try_get_ops() in tpm-space.c

Description

In the Linux kernel, the following vulnerability has been resolved: tpm: use try_get_ops() in tpm-space.c As part of the series conversion to remove nested TPM operations: https://lore.kernel.org/all/20190205224723.19671-1-jarkko.sakkinen@linux.intel.com/ exposure of the chip->tpm_mutex was removed from much of the upper level code. In this conversion, tpm2_del_space() was missed. This didn't matter much because it's usually called closely after a converted operation, so there's only a very tiny race window where the chip can be removed before the space flushing is done which causes a NULL deref on the mutex. However, there are reports of this window being hit in practice, so fix this by converting tpm2_del_space() to use tpm_try_get_ops(), which performs all the teardown checks before acquring the mutex.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

4d57856a21ed2abe33412e0526cc84bdcf67ea08 to < 5b1d2561a03e534064b51c50c774657833d3d2cfaffected
4d57856a21ed2abe33412e0526cc84bdcf67ea08 to < 95193d12f10a8a088843b25e0f5fe1d83ec6b079affected
4d57856a21ed2abe33412e0526cc84bdcf67ea08 to < 476ddd23f818fb94cf86fb5617f3bb9a7c92113daffected
4d57856a21ed2abe33412e0526cc84bdcf67ea08 to < eda1662cce964c8a65bb86321f8d9cfa6e9ceaabaffected
4d57856a21ed2abe33412e0526cc84bdcf67ea08 to < ba84f9a48366dcc3cdef978599433efe101dd5bdaffected
4d57856a21ed2abe33412e0526cc84bdcf67ea08 to < fb5abce6b2bb5cb3d628aaa63fa821da8c4600f9affected

Linux Linux

Default version status: affected

4.12affected
0 to < 4.12unaffected
5.4.188 to ≤ 5.4.*unaffected
5.10.109 to ≤ 5.10.*unaffected
5.15.32 to ≤ 5.15.*unaffected
5.16.18 to ≤ 5.16.*unaffected
5.17.1 to ≤ 5.17.*unaffected
5.18 to ≤ *unaffected

CVE-2022-49286

tpm: use try_get_ops() in tpm-space.c

Description

Affected products

Linux Linux

Linux Linux

References