There's a block of code in Anaconda that tries to account for a corrupted kernel command-line string by adding an extra double-quote: https://github.com/rhinstaller/anaconda/blob/7ae48f73b80e86d0f64b43f037785c22144cab2e/pyanaconda/core/kernel.py#L97-L99

(left, middle, right) = cmdline.rpartition("BOOT_IMAGE=")
if right.count('"') % 2:
cmdline = left + middle + '"' + right

This code doesn't account for escaped quotes, so e.g. if you add this to the kernel command-line:

foo=bar\"baz

The above code thinks there's an unbalanced number of quotes, inserts one, and causes shlex.split() to throw a "No closing quotation" ValueError.

Reproducible: Always

Steps to Reproduce:
1. Load install media that runs Anaconda
2. Edit the command-line in GRUB to add an argument containing an escaped double-quote
3. Continue the boot
Actual Results:
Anaconda throws a ValueError very early in its startup

Expected Results:
Anaconda loads the GUI normally