On Fri, Jul 14, 2017 at 12:58:03PM -0700, Josh Zimmerman wrote: > Backport of d1bd4a792d3961a04e6154118816b00167aad91a upstream. > > If a TPM2 loses power without a TPM2_Shutdown command being issued (a > "disorderly reboot"), it may lose some state that has yet to be > persisted to NVRam, and will increment the DA counter. After the DA > counter gets sufficiently large, the TPM will lock the user out. > > NOTE: This only changes behavior on TPM2 devices. Since TPM1 uses sysfs, > and sysfs relies on implicit locking on chip->ops, it is not safe to > allow this code to run in TPM1, or to add sysfs support to TPM2, until > that locking is made explicit. > --- > drivers/char/tpm/tpm-chip.c | 36 ++++++++++++++++++++++++++++++++++++ > drivers/char/tpm/tpm-sysfs.c | 7 +++++++ > 2 files changed, 43 insertions(+) >
Again no signed-off-by :( ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ tpmdd-devel mailing list tpmdd-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tpmdd-devel
