Processes getting wedged in "U" (uninterruptible wait), state after Security Update 2020-003

[Ryan Schmidt]

On Jun 1, 2020, at 15:48, Greg Earle wrote:

> On 29 May 2020, at 8:56, Ryan Schmidt wrote:
> 
>> So I'm not sure how the `-sp` flags got into your launchd plist again when they're not supported anymore.  Maybe Apple made a mistake in the security update.  If so, I'd expect them to reissue it.  If they do, the macOS build number should change.  I'm running Mojave 10.14.6 build 18G5033.  How about you?  If you're running less than that, run Software Update again, or try downloading the security update from Apple's web site.
>> 
>> Alternately, is it possible that you edited the plist file yourself to add the -sp flags?  MacPorts used to have instructions in the notes of the gdb port telling users to add the -p flag to the existing -s flag since this was required for gdb to work in OS X 10.10.  We removed those instructions some years ago since they were no longer helpful in OS X 10.11 and later but maybe you found and followed similar instructions elsewhere on the Internet, or you ran some installer or script that edited it for you.  On my Mojave system, the plist hasn't been modified since 2018-08-21, but you showed that on your system it was modified on 2020-04-16.  Of course, editing that file manually would require disabling System Integrity Protection.  Have you disabled SIP?  If so, consider reenabling it to protect your system from unwanted modifications.
> 
> Ryan et al.,
> 
> Apologies for the late update.  I discovered after I sent my last e-mail to the list that on April 16th I did a "port upgrade outdated" and it updated several things including (g)gdb.  24 minutes later, the .plist file was edited.  I'm assuming that I must have done it and for the very reason you describe - I found old MacPorts list postings saying it was a workaround for gdb not being codesigned.
> 
> I didn't reboot the system after changing the .plist or I would have found this problem back then, and not assumed it was due to some change made by Apple with Security Update 2020-003 which is the first time I've rebooted the system since April 16th.
> 
> With egg on face,
> 
> 		- Greg

Thanks for letting us know! Glad we were able to figure out what happened. \r