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tarfs: Fix support for large files
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Authored by des on Nov 12 2025, 7:07 PM.
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Details

Summary
  • When fast-forwarding through a zstd frame, we incorrectly used the min() inline function instead of the MIN() macro. The function truncates the result to unsigned int, resulting in a decompression error when trying to seek more than 4 GB into the frame.
  • POSIX states that a size extended header record overrides the size field in the header if present, and that one must be included if the size of the file exceeds 8 GB (the size field maxes out at 64 GB).

MFC after: 1 week
Sponsored by: Klara, Inc.
Fixes: 69d94f4c7608 ("Add tarfs, a filesystem backed by tarballs.")

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rG FreeBSD src repository
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