tpm_crb: check for bad response size

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commit 8569defde8 upstream.

Make sure size of response buffer is at least 6 bytes, or
we will underflow and pass large size_t to memcpy_fromio().
This was encountered while testing earlier version of
locality patchset.

Fixes: 30fc8d138e ("tpm: TPM 2.0 CRB Interface")
Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Jerry Snitselaar 2017-03-10 17:46:04 -07:00 • committed by Greg Kroah-Hartman

parent 0c15030521

commit cc15d340ec

1 changed files with 1 additions and 2 deletions

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drivers/char/tpm/tpm_crb.c

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