tree f83f2a53ad011054d974d023ef9fb60e62b29396
parent 72f2915aa3b45634c3a287d2cece5633c98a2920
author Mansi Awasthi <maawas@microsoft.com> 1581401292 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1581401292 +0000

Add a null check on return value of CPDF_StructTree::AddPageNode().

This CL Adds a null check for |pParentElement| before usage inside
AddPageNode(). This ensures that the code handles the scenario when
AddPageNode() returns nullptr if depth is greater than
kStructTreeMaxRecursion(= 32). This CL also includes a test tagged PDF
with deeply nested tags(nested depth > 33). The file is used to validate
if struct tree is loaded for this file.

Bug: pdfium:1480
Change-Id: I66c561d6708f8d89a0616eb7adef8459ae952662
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/66110
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Mansi Awasthi <maawas@microsoft.com>