Public bug reported:
I regularly (once almost every hour) get segfaults resported in systemd-
resolved. The syslog is not always the same:
Dec 21 06:59:21 marshall kernel: [988042.071003] systemd-resolve[15794]:
segfault at e60e8ad514 ip 000000e60e8ad514 sp 00007ffe0376e748 error 14 in
systemd-resolved[556f74bcf000+59000]
Dec 21 06:59:21 marshall systemd[1]: systemd-resolved.service: Main process
exited, code=dumped, status=11/SEGV
Dec 21 06:59:21 marshall systemd[1]: systemd-resolved.service: Failed with
result 'core-dump'.
Dec 21 08:17:47 marshall kernel: [992748.334333] systemd-resolve[16943]:
segfault at 2a11d9b0 ip 00007f4810f5ad26 sp 00007fff544db0f0 error 4 in
libsystemd-shared-237.so[7f4810e1f000+1b5000]
Dec 21 08:17:47 marshall systemd[1]: systemd-resolved.service: Main process
exited, code=dumped, status=11/SEGV
Dec 21 08:17:47 marshall systemd[1]: systemd-resolved.service: Failed with
result 'core-dump'.
Dec 21 06:22:45 marshall systemd-resolved[15727]: Assertion 'p->n_ref > 0'
failed at ../src/resolve/resolved-dns-packet.c:210, function
dns_packet_unref(). Aborting.
Dec 21 06:22:45 marshall systemd[1]: systemd-resolved.service: Main process
exited, code=dumped, status=6/ABRT
Dec 21 06:22:45 marshall systemd[1]: systemd-resolved.service: Failed with
result 'core-dump'.
Dec 21 06:17:46 marshall systemd-resolved[15662]: Assertion
'DNS_TRANSACTION_IS_LIVE(q->state)' failed at
../src/resolve/resolved-dns-query.c:540, function dns_query_complete().
Aborting.
Dec 21 06:17:46 marshall systemd[1]: systemd-resolved.service: Main process
exited, code=dumped, status=6/ABRT
Dec 21 06:17:46 marshall systemd[1]: systemd-resolved.service: Failed with
result 'core-dump'.
The system in question uses dnsmasq as local DNS server. Logging that is
probably unrelated, but often seen (possibly due to the setup with dnsmasq) is:
dec 21 10:22:00 marshall systemd-resolved[3183]: Server returned error
NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying
transaction with reduced feature level UDP.
dec 21 10:17:15 marshall systemd-resolved[3183]: Using degraded feature set
(TCP) for DNS server 127.0.0.1.
# dpkg --status systemd
Package: systemd
Installed-Size: 12444
Maintainer: Ubuntu Developers <ubuntu-devel-disc...@lists.ubuntu.com>
Architecture: amd64
Multi-Arch: foreign
Version: 237-3ubuntu10.9
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1809438
Title:
systemd-resolved segfaults
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