tree 65bd2a8994345c5b793541206f54a15bf56903a9
parent 4c1a67bd3606540b9b42caff34a1d5cd94b1cf65
author Darrick J. Wong <darrick.wong@oracle.com> 1500327057 -0700
committer Darrick J. Wong <darrick.wong@oracle.com> 1500586953 -0700

xfs: check _alloc_read_agf buffer pointer before using

In some circumstances, _alloc_read_agf can return an error code of zero
but also a null AGF buffer pointer.  Check for this and jump out.

Fixes-coverity-id: 1415250
Fixes-coverity-id: 1415320
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>