tree 8fed4e5168e96ad8f5cbd7aa014b4b1a2dfc5673
parent 2f71761a90bdccdb5f4a99e8b231c96aba0967d9
author Evangelos Foutras <evangelos@foutrelis.com> 1653426371 +0300
committer Commit Bot <commit-bot@chromium.org> 1654690559 +0000

Avoid out-of-bounds string indexing

In GetSubBuildDirAsOutputFile(), when the source directory is the same
as the build directory, an out-of-bounds string index is used and thus
triggers an assertion in libstdc++. Fix this by checking if the source
directory is longer than the build directory before using the latter's
length as the index.

Bug: 293
Fixes: fd9f2036f26d ("Fix output directories for generated source
                      files.")
Change-Id: I0b0756a01f181fb14f4bd97b45e1f441be3c0e8b
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/14080
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>