Yes, this fixes the issue for me. Thanks. Alexander
> -----Original Message----- > From: Jarkko Sakkinen [mailto:[email protected]] > Sent: Tuesday, March 28, 2017 12:25 PM > To: Steffen Alexander (IFAG CCS ESS D SW A) > Cc: [email protected]; linux-security- > [email protected]; Peter Huewe; Marcel Selhorst; Jason Gunthorpe; > open list > Subject: Re: [PATCH] tpm: do handle area size validation only when TPM > space used > > So do you need this or not? > > /Jarkko > > On Mon, Mar 27, 2017 at 12:08:15AM +0300, Jarkko Sakkinen wrote: > > In order to not cause backwards compatibility issues with > > /dev/tpm0 disable handle area size validation if tpm_transmit is not > > called with a TPM space. > > > > Signed-off-by: Jarkko Sakkinen <[email protected]> > > --- > > drivers/char/tpm/tpm-interface.c | 9 +++++++-- > > 1 file changed, 7 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/char/tpm/tpm-interface.c > > b/drivers/char/tpm/tpm-interface.c > > index bf0c3fa..158c1db 100644 > > --- a/drivers/char/tpm/tpm-interface.c > > +++ b/drivers/char/tpm/tpm-interface.c > > @@ -328,7 +328,9 @@ unsigned long tpm_calc_ordinal_duration(struct > > tpm_chip *chip, } EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration); > > > > -static bool tpm_validate_command(struct tpm_chip *chip, const u8 > > *cmd, > > +static bool tpm_validate_command(struct tpm_chip *chip, > > + struct tpm_space *space, > > + const u8 *cmd, > > size_t len) > > { > > const struct tpm_input_header *header = (const void *)cmd; @@ - > 340,6 > > +342,9 @@ static bool tpm_validate_command(struct tpm_chip *chip, > const u8 *cmd, > > if (len < TPM_HEADER_SIZE) > > return false; > > > > + if (!space) > > + return true; > > + > > if (chip->flags & TPM_CHIP_FLAG_TPM2 && chip->nr_commands) { > > cc = be32_to_cpu(header->ordinal); > > > > @@ -386,7 +391,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, struct > tpm_space *space, > > unsigned long stop; > > bool need_locality; > > > > - if (!tpm_validate_command(chip, buf, bufsiz)) > > + if (!tpm_validate_command(chip, space, buf, bufsiz)) > > return -EINVAL; > > > > if (bufsiz > TPM_BUFSIZE) > > -- > > 2.9.3 > > ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/tpmdd-devel
