Mac Pro suffers kernel panics out of nowhere

Hi guys! 

I have a big issue here: my Mac Pro was working just fine and today I wanted to reboot the computer, just like I do every now and then. But today, it went wrong.

The Mac is now stuck in a reboot loop, the load progress bar goes up to around 30% then continues pixel by pixel for quite some time, and finally, it restarts. All of this again and again.

I’ve already tried running First Aid via Recovery (which states that the drive is already fine), reinstalling macOS Big Sur, running Apple Diagnostics (which returned no error), Target Disk Mode displays the FireWire and Thunderbolt logos (I don’t know if it mounts OK, I haven’t had the opportunity to test it), and Safe Mode refuses to take effect (when trying to boot in Safe Mode, it crashes as if I did not press the Shift key), the only thing I see is when running Verbose Mode, the boot up process always goes until the same point (IOTimeSyncLocalClockPort::handleGeneralNotification<ptr>), then freezes for a long time, then displays way too much information in a split second, and then restart. I managed to take a burst shot of the final sequence, here are a few stills from it.

One of the first times I ran Verbose mode:

Every time for the last 2-3 hours:

When the kernel panic occurs:

It specifically states at the end :

** In memory Panic Stackshot Succeeded ** Bytes Traced 139944 (Uncompressed 354248) **

Transmitting kernel state, please wait:

100..Recorded panic stackshot in core file at offset 0x7000, compressed to 121205 bytes

Is that any clue to you?

I have no idea what caused the issue, it worked perfectly fine before the first reboot and since I have no way of loading macOS, I don’t know how I can pass information along to you. It’s driving me crazy because all diagnosis tools seem to say « Everything’s fine » but obviously, something goes wrong :/

Thank you so much in advance!

Charles