misc: fix Coverity bugs

Fix Coverity bugs 1297093, 1297096, 1297489, 1297491, 1297493,
1297506, 1297507, 1297514, 1297516, and 1297517.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
8 files changed