Bugzilla

### Security Approval Request
* **How easily could an exploit be constructed based on the patch?**: The exploiter would need an intimate understanding of the recently landed code for indirect wasm calls, but given that i think the patch strongly hints at what's going on.  The test case would certainly aid exploit construction; I can remove it and land it later.
* **Do comments in the patch, the check-in comment, or tests included in the patch paint a bulls-eye on the security problem?**: Yes
* **Which older supported branches are affected by this flaw?**: FF96
* **If not all supported branches, which bug introduced the flaw?**: Bug 1742053
* **Do you have backports for the affected branches?**: Yes
* **If not, how different, hard to create, and risky will they be?**: 
* **How likely is this patch to cause regressions; how much testing does it need?**: Does not need manual testing; unlikely to cause problems.

### Security Approval Request
* **How easily could an exploit be constructed based on the patch?**: The exploiter would need an intimate understanding of the recently landed code for indirect wasm calls, but given that i think the patch hints clearly at what's going on.  From there to an exploit takes a little thinking but not too much.  (The test case is worse, but I've removed it to a different patch.)
* **Do comments in the patch, the check-in comment, or tests included in the patch paint a bulls-eye on the security problem?**: Maybe
* **Which older supported branches are affected by this flaw?**: FF96
* **If not all supported branches, which bug introduced the flaw?**: Bug 1742053
* **Do you have backports for the affected branches?**: Yes
* **If not, how different, hard to create, and risky will they be?**: 
* **How likely is this patch to cause regressions; how much testing does it need?**: Does not need manual testing; unlikely to cause problems.