Fix resource leaks: file descriptors and pipes not closed on error paths

[knqyf263]

Problem

1. File descriptor leak in pkg/fanal/artifact/vm/file.go

In the newFile() function (line 39), a file is opened:

f, err := os.Open(filePath)

When errors occur on lines 46, 52, or 60, the function returns without closing the file descriptor, causing a resource leak.

2. Pipe resource leak in pkg/flag/options.go

In the outputPluginWriter() function (line 585), pipes are created:

pr, pw := io.Pipe()

When an error occurs on line 591, the function returns without closing these pipe resources.

Impact

Resources are not properly closed on error paths, leading to potential resource leaks.

Solution

Implement proper cleanup using defer statements with named error returns to ensure resources are closed on all error paths.

References

• Discussion SAST. Potential memory leak in pkg/fanal/artifact/vm/file.go and in pkg/flag/options.go #9530