Bug report

bpo-38319/gh-16491 (PR #82500) tried to fix the use of os.sendfile() for larger than 2 GiB files on 32-bit FreeBSD. But it only fixed socket.sendfile() for the case when count is false. If count is not false, blocksize is calculated as count - total_sent in the loop, and can cause an integer overflow if count is larger than 2 GiB.

Linked PRs

• gh-114077: Fix OverflowError in socket.sendfile() when pass count >2GiB #114079
• [3.12] gh-114077: Fix OverflowError in socket.sendfile() when pass count >2GiB (GH-114079) #114110
• [3.11] gh-114077: Fix OverflowError in socket.sendfile() when pass count >2GiB (GH-114079) #114111