File H5O_dtype_decode_helper-Parent-of-enum-needs-to-have-same-size-as-enum-itself.patch of Package hdf5

From: Egbert Eich <eich@suse.com>
Date: Wed Sep 28 14:54:58 2022 +0200
Subject: H5O_dtype_decode_helper: Parent of enum needs to have same size as enum itself
Patch-mainline: Not yet
Git-repo: https://github.com/HDFGroup/hdf5
Git-commit: 9dddcb0c73cc9d42adcc9454e6d0eda782a31a55
References: 

The size of the enumeration values is determined by the size of the parent.
Functions accessing the enumeration values use the size of the enumartion
to determine the size of each element and how much data to copy. Thus the
size of the enumeration and its parent need to match.
Check here to avoid unpleasant surprises later.

This fixes CVE-2018-14031.

Signed-off-by: Egbert Eich <eich@suse.com>
Signed-off-by: Egbert Eich <eich@suse.de>
---
 src/H5Odtype.c | 3 +++
 1 file changed, 3 insertions(+)
diff --git a/src/H5Odtype.c b/src/H5Odtype.c
index ac0341076e..1942585fac 100644
--- a/src/H5Odtype.c
+++ b/src/H5Odtype.c
@@ -459,6 +459,9 @@ H5O_dtype_decode_helper(H5F_t *f, unsigned *ioflags /*in,out*/, const uint8_t **
             if (H5O_dtype_decode_helper(f, ioflags, pp, dt->shared->parent) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTDECODE, FAIL, "unable to decode parent datatype")
 
+            if (dt->shared->parent->shared->size != dt->shared->size)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTDECODE, FAIL, "ENUM size does not match parent")
+
             /* Check if the parent of this enum has a version greater than the
              * enum itself. */
             H5O_DTYPE_CHECK_VERSION(dt, version, dt->shared->parent->shared->version, ioflags, "enum", FAIL)