Processes getting wedged in "U" (uninterruptible wait) state after Security Update 2020-003
prokashs at gmail.com
Fri May 29 14:04:09 UTC 2020
First, I'm not sure how they are parsing . I see -sp, but the help is
showing -ps. Here is a link for this
You know that taskgated is a daemon launched by launchctl service -
which more like crond. Now comes the - task_for_pid () functionality.
>From 10.14 Apple did restrict accesses to XPC ports, which is the core
IPC on darwin. Basically any program tries to access task_for_pid()
will fail from that version onward, but in this case SIP is disabled
the booting from a different image ( internally). ___ So I think Apple
made a mistake while they were pushing out the beta. It's not unusual.
I've seen many times.
Catalina ( 10.15.N) will have more restrictions, 10.16 will have
different 3rd party supports ( kext, kernel pseudo drivers will not be
loaded, unless they allow, based on specific notarization - yet to be
So if your machines are being used ( or a part of some infrastructure
) by many people, backup/downtime/migration/etc seems to be logical
On Fri, May 29, 2020 at 5:44 AM Greg Earle <earle at isolar.dyndns.org> wrote:
> On 29 May 2020, at 4:47, Franco Vaccari wrote:
> > I would try other options before reinstalling the system, who knows,
> > reinstalling the developer tools, restarting with shift to clean
> > caches, reinstalling the security update, but ok, maybe reinstalling
> > everything from backup may be the easiest…
> > Let us know how it went…
> Just to summarize the (apparent) solution for the list:
> It looks like Security Update 2020-003 changed the "taskgated" plist
> It added a single line with a new "-sp" switch:
> whdmac:~ root# diff -rC 3
> /System/Library/LaunchDaemons/DO_NOT_USE_com.apple.taskgated.plist_BAD 2020-04-16
> 21:28:38.000000000 -0700
> --- /System/Library/LaunchDaemons/com.apple.taskgated.plist 2019-04-14
> 18:58:56.000000000 -0700
> *** 19,25 ****
> - <string>-sp</string>
> --- 19,24 ----
> The trouble is, "taskgated" does not seem to support "-sp":
> whdmac:/ root# /usr/libexec/taskgated -sp
> taskgated: invalid option -- s
> Usage: taskgated [-ps] [-t seconds] [-i pid]
> So, I don't understand why Apple added this switch.
> I also don't understand why everyone who installed this Security Update
> has not also been affected by this?!?
> Anyway, I removed the "-sp" line, rebooted, and now everything works
> again - "taskgated" is running and isn't exiting anymore, my Postgres
> server is running happily, and my MacPorts binaries are running without
> Apologies for the slightly off-topic thread ...
> - Greg
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