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Groups > linux.debian.bugs.dist > #1102816

Bug#1004740: exim4: SIGSEGV (maybe attempt to write to immutable memory) when sending a mail; message frozen

From Gedalya <gedalya@gedalya.net>
Newsgroups linux.debian.bugs.dist
Subject Bug#1004740: exim4: SIGSEGV (maybe attempt to write to immutable memory) when sending a mail; message frozen
Date 2022-05-11 17:20 +0200
Message-ID <ElWi6-eMGS-1@gated-at.bofh.it> (permalink)
References (4 earlier) <DMrC9-pt-7@gated-at.bofh.it> <Ely65-eyfa-1@gated-at.bofh.it> <ElyfL-eyiX-1@gated-at.bofh.it> <DM1HI-1iW-3@gated-at.bofh.it> <ElyfL-eyiX-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 5/10/22 21:30, Gedalya wrote:
> I forgot to mention: google seems to be closing the connection immediately after the deferral, causing the logged TLS error lines, and this seems to be a necessary component for this issue

No. That's incorrect.

I've reproduced this with plain Debian-built exim4-daemon-light 4.95-5 and 4.96~RC0-1, with the remote setup being my two MX servers running exim with a simple "defer" acl verb, not closing the connection. The behavior seems quite similar with both exim versions. See attachments.

I'm a little dazzled by the variety of crashes I've seen so far: smtp_setup_conn > tls_client_start > verify_certificate, and during ARC signing, but it could be just noise so I'll leave it alone for now.

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Bug#1004740: exim4: SIGSEGV (maybe attempt to write to immutable memory) when sending a mail; message frozen Gedalya <gedalya@gedalya.net> - 2022-05-11 17:20 +0200
  Bug#1004740: exim4: SIGSEGV (maybe attempt to write to immutable memory) when sending a mail; message frozen Matt Corallo <rpbdbrciwe@mattcorallo.com> - 2022-05-16 07:20 +0200

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