dovecot: lmtp: Error: fatal error: failed to reserve page summary memory

[Roman Vasilyev]

Sorry for offtopic, don't know where to ask it
after updating from `ubuntu` 18 to 20
started getting this on running golang binary from sieve rules file
```
Sep 17 08:54:00 lonjemail spamd[3231]: spamd: connection from ::1
[::1]:57844 to port 783, fd 5
Sep 17 08:54:00 lonjemail spamd[3231]: spamd: setuid to Debian-exim
succeeded
Sep 17 08:54:00 lonjemail spamd[3231]: spamd: processing message
<CANcP0tbws-r=L8KrTug_NKLk0EuPwo1vKotdpV=Pf95Pxusbww at mail.gmail.com> for
Debian-exim:114
Sep 17 08:54:00 lonjemail systemd-resolved[527]: Server returned error
NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying
transaction with reduced feature level UDP.
Sep 17 08:54:00 lonjemail systemd-resolved[527]: message repeated 8 times:
[ Server returned error NXDOMAIN, mitigating potential DNS violation
DVE-2018-0001, retrying transaction with reduced feature level UDP.]
Sep 17 08:54:00 lonjemail spamd[3231]: spamd: clean message (1.1/5.0) for
Debian-exim:114 in 0.3 seconds, 2760 bytes.
Sep 17 08:54:00 lonjemail spamd[3231]: spamd: result: . 1 -
DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,RDNS_NONE,SPF_HELO_NONE,SPF_PASS
scantime=0.3,size=2760,user=Debian-exim,uid=114,required_score=5.0,rhost=::1,raddr=::1,rport=57844,mid=<CANcP0tbws-r=L8KrTug_NKLk0EuPwo1vKotdpV=
Pf95Pxusbww at mail.gmail.com>,autolearn=no autolearn_force=no
Sep 17 08:54:00 lonjemail dovecot: lmtp(4254): Connect from local
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error: fatal error: failed to
reserve page summary memory
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error:
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error: runtime stack:
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error: runtime.throw(0x1a48db5,
0x25)
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error:
#011/usr/local/go/src/runtime/panic.go:1116 +0x72 fp=0x7ffe160d5860
sp=0x7ffe160d5830 pc=0x4ce5d2
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error:
runtime.(*pageAlloc).sysInit(0x232c268)
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error:
#011/usr/local/go/src/runtime/mpagealloc_64bit.go:80 +0x185
fp=0x7ffe160d58f0 sp=0x7ffe160d5860 pc=0x4c4e25
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error:
runtime.(*pageAlloc).init(0x232c268, 0x232c260, 0x25cb8d8)
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error:
#011/usr/local/go/src/runtime/mpagealloc.go:317 +0x75 fp=0x7ffe160d5918
sp=0x7ffe160d58f0 pc=0x4c2815
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error:
runtime.(*mheap).init(0x232c260)
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error:
#011/usr/local/go/src/runtime/mheap.go:743 +0x24b fp=0x7ffe160d5940
sp=0x7ffe160d5918 pc=0x4bf84b
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error: runtime.mallocinit()
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error:
#011/usr/local/go/src/runtime/malloc.go:480 +0x109 fp=0x7ffe160d5968
sp=0x7ffe160d5940 pc=0x4a4c49
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error: runtime.schedinit()
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error:
#011/usr/local/go/src/runtime/proc.go:563 +0x65 fp=0x7ffe160d59c0
sp=0x7ffe160d5968 pc=0x4d1f25
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error:
runtime.rt0_go(0x7ffe160d5ad8, 0x2, 0x7ffe160d5ad8, 0x1813580,
0x7fd3cc8a80b3, 0x7fd3cca6cb80, 0x7ffe160d5ad8, 0x200011c00, 0x501080,
0x1813580, ...)
Sep 17 08:54:00 lonjemail dovecot: lmtp: Error:
#011/usr/local/go/src/runtime/asm_amd64.s:214 +0x125 fp=0x7ffe160d59c8
sp=0x7ffe160d59c0 pc=0x5011c5
Sep 17 08:54:00 lonjemail dovecot:
lmtp(roman)<4254></X0wOCgkY1+eEAAAgcArzw>: program
exec:/usr/lib/dovecot/sieve-execute/smtp (4255): Terminated with non-zero
exit code 2
Sep 17 08:54:00 lonjemail dovecot:
lmtp(roman)<4254></X0wOCgkY1+eEAAAgcArzw>: sieve:
msgid=<CANcP0tbws-r=L8KrTug_NKLk0EuPwo1vKotdpV=Pf95Pxusbww at mail.gmail.com>:
stored mail into mailbox 'Unsubscribe.Neighbors'
Sep 17 08:54:00 lonjemail dovecot: lmtp(4254): Disconnect from local:
Client has quit the connection (state=READY)
Sep 17 08:55:01 lonjemail CRON[4257]: (root) CMD (command -v debian-sa1 >
/dev/null && debian-sa1 1 1)
```

here is sieve rules:
```
require ["variables", "fileinto", "mailbox", "vnd.dovecot.execute"];
if address :matches "from" "*" { set "from" "${1}"; }

if anyof ( header :contains "subject" "unsubscribe neighbours",
                header :contains "subject" "unsubscribe neighbors") {
  execute "smtp" "-neighbors=${from}";
  fileinto :create "Unsubscribe.Neighbors";
} elsif address :contains "from" ["mailer-daemon", "postmaster", "internet
mail delivery"] {
  if header :matches "X-Failed-Recipients" "*" {
    execute "smtp" "-email=${1}";
    fileinto :create "Mail Delivery System";
  } else {
    fileinto :create "Mail Delivery System.Warning";
  }
} else {
  # The rest goes into INBOX
  # default is "implicit keep", we do it explicitly here
  keep;
}
```
Attempted in `/etc/dovecot/conf.d/90-sieve.conf`  vsz_limit = 256M with no
luck
Can somebody help me in fixing it?
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