jbd2: fix integer underflow in jbd2_journal_initialize_fast_commit()

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-72225 · Microsoft / collected KEV context

cve-program · CVE-2026-72225

• https://git.kernel.org/stable/c/aa90f00932bf572d6ef284c977c2a60b39c13bd6
• https://git.kernel.org/stable/c/e144ad0250f77e23e28949587b8b57e40dc3b512
• https://git.kernel.org/stable/c/4b48dcb88bb9117e3d3f051175a9a8b7cff7f8b6
• https://git.kernel.org/stable/c/fb9b49618ed7296ebfad62a3835da8945f727001
• https://git.kernel.org/stable/c/4450dcaadf7d4aae8b6e4223b5d6ee4eb77097a9
• https://git.kernel.org/stable/c/78955fdce8ff654e6d33a2fa90882a1e7eb26330
• https://git.kernel.org/stable/c/a58fc10adf503969fec2007b5afe8987258046c4
• https://git.kernel.org/stable/c/289a2ca0c9b7eae74f93fc213b0b971669b8683d

No related operational record is retained in the current change model.