diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/H5Oattr.c | 7 | ||||
| -rw-r--r-- | src/H5Ppublic.h | 11 |
2 files changed, 10 insertions, 8 deletions
diff --git a/src/H5Oattr.c b/src/H5Oattr.c index ac643ea..cb06f25 100644 --- a/src/H5Oattr.c +++ b/src/H5Oattr.c @@ -221,10 +221,6 @@ H5O__attr_decode(H5F_t *f, H5O_t *open_oh, unsigned H5_ATTR_UNUSED mesg_flags, u else p += attr->shared->ds_size; - /* Get the datatype's size */ - if (0 == (dt_size = H5T_get_size(attr->shared->dt))) - HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, NULL, "unable to get datatype size") - /* Get the datatype & dataspace sizes */ if (0 == (dt_size = H5T_get_size(attr->shared->dt))) HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, NULL, "unable to get datatype size") @@ -234,6 +230,9 @@ H5O__attr_decode(H5F_t *f, H5O_t *open_oh, unsigned H5_ATTR_UNUSED mesg_flags, u /* Compute the size of the data */ H5_CHECKED_ASSIGN(attr->shared->data_size, size_t, ds_size * (hsize_t)dt_size, hsize_t); + /* Check if multiplication has overflown */ + if ((attr->shared->data_size / dt_size) != ds_size) + HGOTO_ERROR(H5E_RESOURCE, H5E_OVERFLOW, NULL, "data size exceeds addressable range") /* Go get the data */ if (attr->shared->data_size) { diff --git a/src/H5Ppublic.h b/src/H5Ppublic.h index 04b8f0e..33a1df9 100644 --- a/src/H5Ppublic.h +++ b/src/H5Ppublic.h @@ -2321,10 +2321,13 @@ H5_DLL herr_t H5Pset_deflate(hid_t plist_id, unsigned level); * (#H5Z_FILTER_DEFLATE) and the Fletcher32 error detection filter * (#H5Z_FILTER_FLETCHER32). * - * The array \p c_values contains \p cd_nelmts integers which are - * auxiliary data for the filter. The integer values will be - * stored in the dataset object header as part of the filter - * information. + * The array \p cd_values contains \p cd_nelmts unsigned integers + * which are auxiliary data for the filter. The values are typically + * used as parameters to control the filter. In a filter's + * \p set_local method (called from \p H5Dcreate), the values are + * interpreted and possibly modified before they are used to control + * the filter. These, possibly modified values, are then stored in + * the dataset object header as auxiliary data for the filter. * * The \p flags argument is a bit vector with the following * fields specifying certain general properties of the filter: |