Fix CVE-2025-2310

[mattjala]

Malformed files can have a zero name-length, which when subtracted lead to an overflow and an out-of-bounds read.

Check that name length is not too small in addition to checking for an overflow directly.

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Important

Fixes overflow and out-of-bounds read in H5O__attr_decode() by ensuring name_len is greater than 1 in H5Oattr.c.

• Security Fix:
  • In H5O__attr_decode() in H5Oattr.c, added a check to ensure name_len is greater than 1 to prevent overflow and out-of-bounds read.
  • This prevents processing of malformed files with zero-length names.

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