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There is a race condition in pkg/archive when using `cmd.Start` for pigz and xz where the `*bufio.Reader` could be returned to the pool while the command is still writing to it, and then picked up and used by a new command. The command is wrapped in a `CommandContext` where the process will be killed when the context is cancelled, however this is not instantaneous, so there's a brief window while the command is still running but the `*bufio.Reader` was already returned to the pool. wrapReadCloser calls `cancel()`, and then `readBuf.Close()` which eventually returns the buffer to the pool. However, because cmdStream runs `cmd.Wait` in a go routine that we never wait for to finish, it is not safe to return the reader to the pool yet. We need to ensure we wait for `cmd.Wait` to finish! Signed-off-by: Stephen Benjamin <stephen@redhat.com> |
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|---|---|---|
| .. | ||
| testdata | ||
| archive.go | ||
| archive_linux.go | ||
| archive_linux_test.go | ||
| archive_other.go | ||
| archive_test.go | ||
| archive_unix.go | ||
| archive_unix_test.go | ||
| archive_windows.go | ||
| archive_windows_test.go | ||
| changes.go | ||
| changes_linux.go | ||
| changes_other.go | ||
| changes_posix_test.go | ||
| changes_test.go | ||
| changes_unix.go | ||
| changes_windows.go | ||
| copy.go | ||
| copy_unix.go | ||
| copy_unix_test.go | ||
| copy_windows.go | ||
| diff.go | ||
| diff_test.go | ||
| example_changes.go | ||
| README.md | ||
| time_linux.go | ||
| time_unsupported.go | ||
| utils_test.go | ||
| whiteouts.go | ||
| wrap.go | ||
| wrap_test.go | ||
This code provides helper functions for dealing with archive files.