From: Darrick J. Wong <djwong@xxxxxxxxxx>
Check that the number of recovered log iovecs is what is expected for
the xattri opcode is expecting.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
fs/xfs/xfs_attr_item.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c
index e5e7ddbc594b..d3559e6b24b7 100644
--- a/fs/xfs/xfs_attr_item.c
+++ b/fs/xfs/xfs_attr_item.c
@@ -737,6 +737,7 @@ xlog_recover_attri_commit_pass2(
const void *attr_value = NULL;
const void *attr_name;
size_t len;
+ unsigned int op;
attri_formatp = item->ri_buf[0].i_addr;
attr_name = item->ri_buf[1].i_addr;
@@ -755,6 +756,32 @@ xlog_recover_attri_commit_pass2(
return -EFSCORRUPTED;
}
+ /* Check the number of log iovecs makes sense for the op code. */
+ op = attri_formatp->alfi_op_flags & XFS_ATTRI_OP_FLAGS_TYPE_MASK;
+ switch (op) {
+ case XFS_ATTRI_OP_FLAGS_SET:
+ case XFS_ATTRI_OP_FLAGS_REPLACE:
+ /* Log item, attr name, attr value */
+ if (item->ri_total != 3) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+ attri_formatp, len);
+ return -EFSCORRUPTED;
+ }
+ break;
+ case XFS_ATTRI_OP_FLAGS_REMOVE:
+ /* Log item, attr name */
+ if (item->ri_total != 2) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+ attri_formatp, len);
+ return -EFSCORRUPTED;
+ }
+ break;
+ default:
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
+ attri_formatp, len);
+ return -EFSCORRUPTED;
+ }
+
/* Validate the attr name */
if (item->ri_buf[1].i_len !=
xlog_calc_iovec_len(attri_formatp->alfi_name_len)) {
