Landing: 655b560b0ebe
Project / Subsystem
binutils / bfd
Date
2026-09-26
Author
Alan Modra <amodra@sourceware.org>
Commit
655b560b0ebec50ace2ec6e281d4655b897c1a40
Source
public_inbox
Perf win
No
Breaking
No
All attributes
- project
- binutils
- subsystem
- bfd
- patch_id
- —
- commit_hash
- 655b560b0ebec50ace2ec6e281d4655b897c1a40
- source_type
- public_inbox
- headline
- Fix integer overflow in COFF section alignment calculation
- tldr
- Prevents UB by using unsigned integers for COFF section alignment calculations.
- author
- Alan Modra <amodra@sourceware.org>
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • binutils
- • bfd
- • bugfix
- • coff
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-09-26T00:00:00.000Z
An undefined behavior (UB) in coff_compute_section_file_positions has been fixed. When processing COFF files with fuzzed section alignments, large alignment values could cause a signed integer overflow. This change replaces the signed file_ptr with an unsigned ufile_ptr for these calculations, correctly handling large alignments and preventing the overflow.