Kernel panic / reboot cycle

[flipphillips]

I was having some trouble with Big Sur networking, so I (thought I had) uninstalled LuLu 2.0

However, when I rebooted, the boot would 'pause' ½ way through the reboot for about 1-2 minutes, then the machine would finish booting to the login screen. I had (exactly) 1 minute to log in and inspect the system each time. (This was compounded by the fact that this machine is managed by the university, I didn't have the FW password to do some reinstall/terminal snooping). I couldn't boot in 'safe' mode or anything. I have since resolved this via a nice conversation with our sysadmins.

The machine would kernel panic/reboot every time, whether I logged in or not. Once I was able to log in via Recovery, it would -not- reboot itself.

I did a Big Sur 'reinstall' -over- the existing install, but that didn't help (I had to do that because I didn't want to go through the mayhem of getting everything back right with the central management software).

About an hour into the 'quick login but just for a minute' cycle, I discovered that the networking was failing, presumably what was happening in that ½-way mark. I quickly opened the Networking Preferences page and saw that 1) there was still a LuLu network item and 2) had the caption 'starting...' beneath it.

I deleted this item.

Subsequently, the machine booted without incident and remains up for more than 60 seconds.

Interestingly, there is still an Extension

 ~  systemextensionsctl list
2 extension(s)
--- com.apple.system_extension.network_extension
enabled	active	teamID	bundleID (version)	name	[state]
*	*	TC3Q7MAJXF	com.adguard.mac.adguard.network-extension (2.5.1/918)	AdGuard Network Extension	[activated enabled]
*	*	VBG97UB4TA	com.objective-see.lulu.extension (2.0.0/2.0.0)	Extension	[activated enabled]

installed and active. I can't remove it unless I blast it with SIP off (which I shall do in a minute). There is, otherwise, no indication that LuLu is on this machine.

I'll pour over the syslog to see what I can find, but I was unable to do too much in the 60 seconds I had each 'boot loop'.

[V-Toll]

I have pretty much the same problem.

It only does the kernel panic (reboot) if I have Google Chrome open. Safari works fine. I've had also the same problem with Little Snitch (had to remove some kernel extensions in recovery/SIP off mode to get the system running again) and changed to Lulu yesterday. That worked fine, even when using Google Chrome. A couple hours ago that changed and every time now I want to use Google Chrome it crashes the whole system pretty fast.

[rob-c]

Seeing the same sort of thing on my machine (Upgraded to Big Sur from Catalina on 2018 MBP) I've attached a trace.

My system would lock up and reboot, then after auto-login within 30s of restoring the previous session it would repeat until I removed the system extension (didn't need to turn SIP off in my case however). MacOS_Firewall.dump.txt

[Parentikus]

The same here MacBook Pro 2019 16" crashing

[objective-see]

Thanks for the (detailed) bug reports. After digging, it appears to be an issue in Apple's kernel code (albeit triggered by LuLu).

As such, after talking to some folks at Apple, I've submitted an official bug report to Apple. ...mahalo for your patience, hope they will push out a fix soon. Will keep you updated.

[MartinoMensio]

Thank you very much @flipphillips for your solution to the kernel panic problem. I had the same situation of 1 minute countdown (with version 2.4.1) and removing the network interface saved me! I still have the extension showing up in systemextensionsctl list but at least I can work again.