Skip to content

Fix TSA #2816217: suppress Flawfinder false positive on Cython JoinPyUnicode memcpy #2029

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
StellaHuang95 merged 4 commits into from
May 29, 2026
+12 −1
Merged

Fix TSA #2816217: suppress Flawfinder false positive on Cython JoinPyUnicode memcpy #2029

Show file tree
Hide file tree
Changes from 3 commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
f5d8f27
Fix TSA #2816217: suppress Flawfinder false positive on Cython JoinPy…
StellaHuang95 May 28, 2026
4d5456b
Merge branch 'main' into stellahuang/tsa-2816217-flawfinder-cython-me…
StellaHuang95 May 28, 2026
6bebc9d
Fix SyntaxError: add missing closing paren on JoinPyUnicode .replace(…
StellaHuang95 May 28, 2026
ae9e5e8
Merge remote-tracking branch 'upstream/main' into stellahuang/tsa-281…
StellaHuang95 May 29, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion src/debugpy/_vendored/pydevd/_pydevd_sys_monitoring/_pydevd_sys_monitoring_cython.c
View file
Open in desktop

Some generated files are not rendered by default. Learn more about how customized files appear on GitHub.

11 changes: 11 additions & 0 deletions src/debugpy/_vendored/pydevd/setup_pydevd_cython.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -177,6 +177,17 @@ def build_extension(dir_name, extension_name, target_pydevd_name, force_cython,
c_file_contents = c_file_contents.replace(r"_pydevd_bundle\\pydevd_cython.pxd", "_pydevd_bundle/pydevd_cython.pxd")
c_file_contents = c_file_contents.replace(r"_pydevd_bundle\\pydevd_cython.pyx", "_pydevd_bundle/pydevd_cython.pyx")

# Suppress Flawfinder false positive (CWE-120) in the Cython 3.x
# `__Pyx_PyUnicode_Join` boilerplate: the destination `result_uval` was just
# allocated via `PyUnicode_New(result_ulength, max_char)`, and the immediately
# preceding `(PY_SSIZE_T_MAX >> kind_shift) - ulength < char_pos` check guards
Comment thread
StellaHuang95 marked this conversation as resolved.
# against char_pos+ulength overflow before the memcpy. The size argument is
# `ulength << kind_shift` which is bounded by the pre-allocated buffer length.
c_file_contents = c_file_contents.replace(
" memcpy((char *)result_udata + (char_pos << kind_shift), udata, (size_t) (ulength << kind_shift));\n",
" memcpy((char *)result_udata + (char_pos << kind_shift), udata, (size_t) (ulength << kind_shift)); /* Flawfinder: ignore */\n",
)

# Suppress Flawfinder false positive (CWE-120/CWE-20) in the
# Cython 3.x ModuleStateLookup boilerplate (`__Pyx_State_ConvertFromInterpIdAsIndex`):
# `read` is a bounded pointer iterator (not POSIX read()), and the loop is
Expand Down
Loading