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xfs: check for a valid error_tag in errortag_add 

Currently we don't check the error_tag when someone's trying to set up
error injection testing.  If userspace passes in a value we don't know
about, send back an error.  This will help xfstests to _notrun a test
that uses error injection to test things like log replay.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong 2016-06-21 11:53:28 +10:00 committed by Dave Chinner
parent 479c641273
commit 128f24d5d9
1 changed files with 3 additions and 0 deletions
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3
fs/xfs/xfs_error.c
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@ -61,6 +61,9 @@ xfs_errortag_add(int error_tag, xfs_mount_t *mp)
int len;
int64_t fsid;
if (error_tag >= XFS_ERRTAG_MAX)
return -EINVAL;
memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {