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"Memory leak in zone VM map entries"?

Hi, all. I have a fairly new iMac (running Catalina, version 10.15.7) and today it's randomly rebooting and I'm getting this error:

panic(cpu 1 caller 0xffffff80125749eb): "zalloc: zone map exhausted while allocating from zone APFS_4K_OBJS, likely due to memory leak in zone VM map entries (1435454160 total bytes, 17472940 elements allocated)"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-6153.141.35/osfmk/kern/zalloc.c:3627

Backtrace (CPU 1), Frame : Return Address

0xffffff91572629f0 : 0xffffff801251c63d

0xffffff9157262a40 : 0xffffff8012656b25

0xffffff9157262a80 : 0xffffff80126486ae

0xffffff9157262ad0 : 0xffffff80124c2a40

0xffffff9157262af0 : 0xffffff801251bd07

0xffffff9157262bf0 : 0xffffff801251c0f7

0xffffff9157262c40 : 0xffffff8012cc0b5c

0xffffff9157262cb0 : 0xffffff80125749eb

0xffffff9157262de0 : 0xffffff7f9403b32b

0xffffff9157262e00 : 0xffffff7f94085148

0xffffff9157262ea0 : 0xffffff7f94086da6

0xffffff9157262fa0 : 0xffffff7f9406476d

0xffffff9157263070 : 0xffffff7f940645fd

0xffffff91572630e0 : 0xffffff7f9406d0bc

0xffffff91572631b0 : 0xffffff7f9406d66a

0xffffff9157263230 : 0xffffff7f9403d070

0xffffff9157263300 : 0xffffff7f9403cb46

0xffffff91572634f0 : 0xffffff7f93fedec9

0xffffff9157263650 : 0xffffff7f940206e1

0xffffff91572636c0 : 0xffffff801276f6af

0xffffff91572638c0 : 0xffffff80127a1638

0xffffff9157263940 : 0xffffff801278a6f6

0xffffff9157263ba0 : 0xffffff801278b1fe

0xffffff9157263f40 : 0xffffff8012b83cd7

0xffffff9157263fa0 : 0xffffff80124c3206

Kernel Extensions in backtrace:

com.apple.filesystems.apfs(1412.141.2)[C7BC9A4C-A233-3F83-ACFC-03EAAE280982]@0xffffff7f93fbb000->0xffffff7f940e2fff

dependency: com.apple.kec.corecrypto(1.0)[02FBB664-AC65-33FE-B843-D0F6EDF20B91]@0xffffff7f934b5000

dependency: com.apple.driver.AppleEffaceableStorage(1.0)[167EE907-2180-3280-973E-33F1CF9F0B33]@0xffffff7f93c1c000

dependency: com.apple.iokit.IOStorageFamily(2.1)[401848BE-FFE8-3A23-9313-0BC891B2BF1F]@0xffffff7f93110000

BSD process name corresponding to current thread: mdsync

Mac OS version:

19H1323

iMac 27″, macOS 10.15

Posted on Sep 3, 2021 10:42 AM

Top-ranking reply

Jack-19

Level 8

46,014 points

Posted on Sep 3, 2021 11:03 AM

Welcome to the Apple Support Communities.

I believe we need to proceed with an EtreCheck report. EtreCheck is a useful App to diagnose and identify issues, both hardware and software. It is trusted by many users. Please follow the steps outlined below:

Navigate to: https://etrecheck.com and get the free version of EtreCheckPro.
Download it. It is a free and trusted app. It is often recommended here on Apple Support Communities.
Open EtreCheck, and before running the report, be sure to check “Allow full Drive Access” at the bottom of the EtreCheckPro window.
Run the report, and put it in a post, as seen here: https://discussions.apple.com/docs/DOC-250000211. We will then examine the report for issues in your Mac.

Cheers,

Jack

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"Memory leak in zone VM map entries"?

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