ext4: fix string copying in parse_apply_sb_mount_options()

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

CVE-2025-71123 · Microsoft / collected KEV context

cve-program · CVE-2025-71123

• https://git.kernel.org/stable/c/52ac96c4a2dd7bc47666000440b0602d9742e820
• https://git.kernel.org/stable/c/6e37143560e37869d51b7d9e0ac61fc48895f8a0
• https://git.kernel.org/stable/c/902ca2356f1e3ec5355c5808ad5d3f9d0095b0cc
• https://git.kernel.org/stable/c/db9ee13fab0267eccf6544ee35b16c9522db9aac
• https://git.kernel.org/stable/c/5bbacbbf1ca4419861dca3c6b82707c10e9c021c
• https://git.kernel.org/stable/c/ee5a977b4e771cc181f39d504426dbd31ed701cc

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