[FS#764] MT7621: Any traffic shaping results in crashes/stack traces

[LEDE Bugs]

The following task has a new comment added:

FS#764 - MT7621: Any traffic shaping results in crashes/stack traces
User who did this - Baptiste Jonglez (bjonglez)

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This is very likely the same issue as FS#804.

Please test the patch mentioned above or the pre-compiled images here https://pub.polyno.me/lede-ramips-FS804/ (17.01 + the above patch, version is r3464+1-82b20d74cb)
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=764#comment2975