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authorDarrick J. Wong <darrick.wong@oracle.com>2016-06-21 11:53:28 +1000
committerDave Chinner <david@fromorbit.com>2016-06-21 11:53:28 +1000
commit128f24d5d9def3c47b6b659b2454f0426a347144 (patch)
treed710ea5064f2301990475e8f6081e9e8313aaa74
parent479c641273df632478cda7fe76b833df64e319bc (diff)
downloadlinux-128f24d5d9def3c47b6b659b2454f0426a347144.tar.bz2
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>
-rw-r--r--fs/xfs/xfs_error.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c
index 88693a98fac5..355619ae5e3e 100644
--- a/fs/xfs/xfs_error.c
+++ b/fs/xfs/xfs_error.c
@@ -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++) {