[Bug 274141] exim crash with dovecot as lda

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274141

            Bug ID: 274141
           Summary: exim crash with dovecot as lda
           Product: Ports & Packages
           Version: Latest
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs@FreeBSD.org
          Reporter: freebsd-pr@erwo.net

Hello,

exim 4.96_1 crashes here on 13.2-RELEASE-p2, so i switched back to 4.95_6

dovecot is configured as lda, using lda seems to trigger the bug

Crash message:
2023-09-28 10:28:37 1qlmNv-0000Dc-0J SIGSEGV (fault address: 0x82af7aed8)
2023-09-28 10:28:37 1qlmNv-0000Dc-0J SIGSEGV (maybe attempt to write to
immutable memory)

Also i found in the mainlog an entry like that:
R=localuser T=dovecot_delivery: Tainted arg 4 for dovecot_delivery transport
command: 'email@address.de'

normaly the log entry is like that:

dovecot_delivery transport output: lda(username):

the config of the server:
http://erwo.net/eximconfig/configure

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