Bug 935150

Summary:	net-print/cups-browsed-2.0.0 segfaults when BrowseProtocols contains DNSSD
Product:	Gentoo Linux	Reporter:	pogosyan
Component:	Current packages	Assignee:	Printing Team <printing>
Status:	UNCONFIRMED ---
Severity:	normal	CC:	pogosyan
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	log after cups-browsed is launched manually with -d flag output of cups_browsed -d

Description pogosyan 2024-06-29 19:47:23 UTC

I have CUPS server that serves two printers via cupsd/cups-browsed with option
BrowseRemoteProtocols none
BrowseLocalProtocols CUPS
BrowseProtocols CUPS DNSSD
among which one printer is discovered via DNSSD, and the other is locally attached.    The printers served (from /etc/printca) are

hplaserjet|Lena's LaserJet 1200:rm=polarbear:rp=hplaserjet:
newlaserjet_net|Lena's Laserjet Pro M203dw
(shared):rm=polarbear:rp=newlaserjet_net:

The name of server is polarbear, and the IP is 192.168.1.10
Notice that on this side BrowseProtocols contains DNSSD, but there is no problem.

Now I try to pick up those queues on my laptop running cups-browsed with the following options
BrowseRemoteProtocols none
BrowseLocalProtocols none
BrowseProtocols CUPS DNSSD

In this configuration cups-browsed detects the printers (see the log) but then segfaults before creating the queues on the laptop.   If DNSSD is taken out from the BrowseProtocols options,  queues are created and I do not see segfault.











Reproducible: Always

Steps to Reproduce:
1. launch cupsd/cups-browsed on the server with the options described
2. launch cupsd and cups-browsed on the client with option describde
3.
Actual Results:  
segfault after served queues are detected, but before the local queues on the client are set

Expected Results:  
Either create local queues, or exit gracefully if there is some misconfiguration with the debug diagnostics

Portage 3.0.63 (python 3.12.3-final-0, default/linux/amd64/23.0/split-usr/desktop/plasma, gcc-13, glibc-2.39-r6, 5.15.147-gentoo x86_64)
=================================================================
System uname: Linux-5.15.147-gentoo-x86_64-Intel-R-_Core-TM-_i7-7600U_CPU_@_2.80GHz-with-glibc2.39
KiB Mem:    16141472 total,  10140984 free
KiB Swap:   18874364 total,  13243172 free
Timestamp of repository gentoo: Thu, 27 Jun 2024 19:49:05 +0000
Head commit of repository gentoo: 824626fab16a70194ae724874bdd9aa61eb5cffb

sh bash 5.2_p26-r5
ld GNU ld (Gentoo 2.42 p3) 2.42.0
app-misc/pax-utils:        1.3.7::gentoo
app-shells/bash:           5.2_p26-r5::gentoo
dev-build/autoconf:        2.71-r7::gentoo
dev-build/automake:        1.16.5-r2::gentoo
dev-build/cmake:           3.28.5::gentoo
dev-build/libtool:         2.4.7-r4::gentoo
dev-build/make:            4.4.1-r1::gentoo
dev-build/meson:           1.4.1::gentoo
dev-lang/perl:             5.38.2-r3::gentoo
dev-lang/python:           3.12.3-r1::gentoo
dev-lang/rust-bin:         1.77.1::gentoo
sys-apps/baselayout:       2.15::gentoo
sys-apps/openrc:           0.54.1::gentoo
sys-apps/sandbox:          2.38::gentoo
sys-devel/binutils:        2.42-r1::gentoo
sys-devel/binutils-config: 5.5::gentoo
sys-devel/clang:           17.0.6::gentoo
sys-devel/gcc:             13.2.1_p20240210::gentoo
sys-devel/gcc-config:      2.11::gentoo
sys-devel/llvm:            17.0.6::gentoo
sys-kernel/linux-headers:  6.6-r1::gentoo (virtual/os-headers)
sys-libs/glibc:            2.39-r6::gentoo
Repositories:

gentoo
    location: /var/db/repos/gentoo
    sync-type: git
    sync-uri: https://github.com/gentoo-mirror/gentoo.git
    priority: -1000
    volatile: False

localrepo
    location: /usr/local/portage
    masters: gentoo
    volatile: True

ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /etc/stunnel/stunnel.conf /usr/lib64/libreoffice/program/sofficerc /usr/share/config /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-march=native -O2 -pipe"
DISTDIR="/var/cache/distfiles"
ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GDK_PIXBUF_MODULE_FILE GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR XDG_STATE_HOME"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs buildpkg-live config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync merge-wait multilib-strict network-sandbox news parallel-fetch pid-sandbox pkgdir-index-trusted preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="en_CA.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,-z,pack-relative-relocs"
LEX="flex"
MAKEOPTS="-j3"
PKGDIR="/var/cache/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/dev/shm"
SHELL="/bin/bash"
USE="X a52 aac acl acpi alsa amd64 bluetooth branding bzip2 cairo cdda cdr cet cjk crypt cups dbus declarative djvu dri dts dvdr elogind encode exif flac fortran gdbm gif gpm gui iconv icu jpeg kde kf6compat kwallet lcms libnotify libtirpc lm_sensors mad mng mp3 mp4 mpeg multilib ncurses nls nss ogg opengl openmp pam pango pcre pdf pipewire plasma pm-utils png policykit postscript ppds pulseaudio qml qt5 readline sdl seccomp sound spell split-usr sqlite ssl startup-notification svg test-rust tiff touchpad truetype udev udisks unicode upower usb vaapi vorbis vulkan webp widgets wxwidgets x264 xattr xcb xetex xft xml xv xvid zeroconf zlib" ABI_X86="64" ADA_TARGET="gcc_12" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_anon authn_dbm authn_file authz_dbm authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir env expires ext_filter file_cache filter headers include info log_config logio mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 ntrip navcom oceanserver oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 tsip tripmate tnt ublox" INPUT_DEVICES="evdev synaptics wacom" KERNEL="linux" L10N="en en-US en-CA ru" LCD_DEVICES="bayrad cfontz glk hd44780 lb216 lcdm001 mtxorb text" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php8-2" POSTGRES_TARGETS="postgres15" PYTHON_SINGLE_TARGET="python3_12" PYTHON_TARGETS="python3_12" RUBY_TARGETS="ruby31 ruby32" SANE_BACKENDS="canon genesys" VIDEO_CARDS="intel" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipp2p iface geoip fuzzy condition tarpit sysrq proto logmark ipmark dhcpmac delude chaos account"
Unset:  ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EMERGE_DEFAULT_OPTS, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, INSTALL_MASK, LC_ALL, LD, LFLAGS, LIBTOOL, LINGUAS, MAKE, MAKEFLAGS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PYTHONPATH, RANLIB, READELF, RUSTFLAGS, SIZE, STRINGS, STRIP, YACC, YFLAGS


USE_FLAGS for cups-browsed

 * Found these USE flags for net-print/cups-browsed-2.0.0:
 U I
 - - ldap     : Add LDAP support (Lightweight Directory Access Protocol)
 - - test     : Enable dependencies and/or preparations necessary to run tests (usually controlled by
                FEATURES=test but can be toggled independently)
 + + zeroconf : Support for DNS Service Discovery (DNS-SD)

Comment 1 pogosyan 2024-06-29 20:30:39 UTC Comment hidden (obsolete)

Created attachment 896631 [details]
log after cups-browsed is launched manually with -d flag

It seems the error is intermittent and appears mostly on fresh cuspd start followed by cups-browsed.

Comment 2 pogosyan 2024-06-29 20:55:19 UTC

I am sorry, attachment is incorrect, but I cannot find how to delete it

Comment 3 pogosyan 2024-06-30 02:24:08 UTC

Created attachment 896637 [details]
output of cups_browsed -d