tree 0055562c31266189533099d34f0909a0ec4c0bd4
parent 279e677faa775ad16e75c32e1bf4a37f8158bc61
author Eric Paris <eparis@redhat.com> 1242233440 -0400
committer James Morris <jmorris@namei.org> 1242772205 +1000

TPM: get_event_name stack corruption

get_event_name uses sprintf to fill a buffer declared on the stack.  It fills
the buffer 2 bytes at a time.  What the code doesn't take into account is that
sprintf(buf, "%02x", data) actually writes 3 bytes.  2 bytes for the data and
then it nul terminates the string.  Since we declare buf to be 40 characters
long and then we write 40 bytes of data into buf sprintf is going to write 41
characters.  The fix is to leave room in buf for the nul terminator.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>