[COVERITY] Avoid static buffer overruns in debugfs

Add an extra byte to EXT2_NAME_LEN in the static allocation for the
required trailing null.  This allows filenames up to the maximum
length of EXT2_NAME_LEN withover an overrun.

Coverity ID: 11: Overrun Static
Coverity ID: 12: Overrun Static
Coverity ID: 13: Overrun Static

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
4 files changed