Your message dated Sun, 19 Oct 2025 12:02:34 +0000
with message-id <[email protected]>
and subject line Bug#1114964: fixed in dhcpcd 1:10.1.0-11+deb13u1
has caused the Debian Bug report #1114964,
regarding dhcpcd segfault on boot
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
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--
1114964: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1114964
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: dhcpcd-base
Version: 1:10.1.0-11
I am seeing a segfault from dhcpcd during the boot process. It is
recorded in syslog with the following:
2025-09-09T23:16:19.340385-04:00 test-debian64 kernel: dhcpcd.real[775]:
segfault at 20 ip 000055e44c77ed0f sp 00007fff3392fca0 error 4 in
dhcpcd.real[2cd0f,55e44c75b000+3e000] likely on CPU 0 (core 0, socket 0)
2025-09-09T23:16:19.340392-04:00 test-debian64 kernel: Code: e8 fd ff ff 31
d2 66 41 89 54 24 60 e9 8e fe ff ff e8 15 c9 fd ff 0f 1f 44 00 00 f3 0f 1e fa
41 54 48 8d 57 38 41 89 f4 55 53 <48> 8b 47 20 48 89 fb 48 8d 3d 14 bf 01 00 48
8d 70 18 31 c0 e8 48
The daemon is being invoked from NetworkManager. The crash appears to
be the cause of an unusual delay during boot for the systemd unit
"NetworkManager-wait-online.service", but the system does eventually
join the network.
I was not able to obtain a core dump until I rebuilt the package with
the --disable-privsep compile-time option. Here is the backtrace from
the core dump:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00005555734227da in ipv4_deladdr (addr=0x0, keeparp=0)
at ./src/ipv4.c:527
527 logdebugx("%s: deleting IP address %s",
(gdb) bt
#0 0x00005555734227da in ipv4_deladdr (addr=0x0, keeparp=0)
at ./src/ipv4.c:527
#1 0x0000555573422e9a in ipv4_applyaddr (arg=0x5555829fd9b0)
at ./src/ipv4.c:763
#2 0x000055557341d3c5 in dhcp_drop (ifp=0x5555829fd9b0,
reason=0x55557344258f "EXPIRE") at ./src/dhcp.c:2806
#3 0x00005555734211c2 in dhcp_handleifa (cmd=21, ia=0x5555829da860, pid=753)
at ./src/dhcp.c:4215
#4 0x000055557342343b in ipv4_handleifa (ctx=0x7fffff4f2500, cmd=21,
ifs=0x5555829fcc70, ifname=0x5555829fd9c8 "enp0s3", addr=0x7fffff4ee184,
mask=0x7fffff4ee188, brd=0x7fffff4ee18c, addrflags=0, pid=753)
at ./src/ipv4.c:953
#5 0x00005555734130ad in link_addr (ctx=0x7fffff4f2500, ifp=0x5555829fd9b0,
nlm=0x7fffff4ee370) at ./src/if-linux.c:886
#6 0x000055557341347e in link_netlink (ctx=0x7fffff4f2500, arg=0x0,
nlm=0x7fffff4ee370) at ./src/if-linux.c:998
#7 0x000055557341288d in if_getnetlink (ctx=0x7fffff4f2500,
iov=0x7fffff4ee360, fd=8, flags=64, cb=0x555573413403 <link_netlink>,
cbarg=0x0) at ./src/if-linux.c:650
#8 0x000055557341389e in if_handlelink (ctx=0x7fffff4f2500)
at ./src/if-linux.c:1102
#9 0x00005555733f7d75 in dhcpcd_handlelink (arg=0x7fffff4f2500, events=1)
at ./src/dhcpcd.c:1141
#10 0x00005555733fda4e in eloop_run_ppoll (eloop=0x5555829d8690,
ts=0x7fffff4f2440, signals=0x7fffff4f2740) at ./src/eloop.c:1106
#11 0x00005555733fdc8e in eloop_start (eloop=0x5555829d8690,
signals=0x7fffff4f2740) at ./src/eloop.c:1228
#12 0x00005555733fbd33 in main (argc=2, argv=0x7fffff4f2a48,
envp=0x7fffff4f2a60) at ./src/dhcpcd.c:2651
If I put a simple workaround into ipv4_deladdr() of the form
if (!addr) return 0;
then dhcpcd does not segfault, but behaves somewhat erratically,
setting up and then releasing the network connection two or three times
before stabilizing (online). Likely something more is needed for an
interim fix.
--- End Message ---
--- Begin Message ---
Source: dhcpcd
Source-Version: 1:10.1.0-11+deb13u1
Done: Martin-Éric Racine <[email protected]>
We believe that the bug you reported is fixed in the latest version of
dhcpcd, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Martin-Éric Racine <[email protected]> (supplier of updated dhcpcd
package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Wed, 24 Sep 2025 07:36:32 +0300
Source: dhcpcd
Binary: dhcpcd dhcpcd-base dhcpcd-base-dbgsym dhcpcd5
Architecture: source amd64 all
Version: 1:10.1.0-11+deb13u1
Distribution: trixie
Urgency: medium
Maintainer: Martin-Éric Racine <[email protected]>
Changed-By: Martin-Éric Racine <[email protected]>
Description:
dhcpcd - DHCPv4 and DHCPv6 dual-stack client (init.d script & systemd unit
dhcpcd-base - DHCPv4 and DHCPv6 dual-stack client (binaries and exit hooks)
dhcpcd5 - DHCPv4 and DHCPv6 dual-stack client (dummy transitional package)
Closes: 1111467 1114964
Changes:
dhcpcd (1:10.1.0-11+deb13u1) trixie; urgency=medium
.
* [patches]
+ DHCP: Fix crash when someone deletes our address (Closes: #1114964).
Cherry-pick from upstream Git (included in Forky since 10.2.0).
* [service]
- Remove /etc/wpa_supplicant from ReadWritePaths (Closes: #1111467).
Otherwise dhcpcd fails to launch if wpasupplicant is not installed.
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Files:
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dhcpcd-base_10.1.0-11+deb13u1_amd64.deb
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dhcpcd5_10.1.0-11+deb13u1_all.deb
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dhcpcd_10.1.0-11+deb13u1_all.deb
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