OpenSSH causes regular alignment traps on ARM (SheevaPlug) when client connections are active. Jan 19 22:01:52 kernel: [21432.387843] Alignment trap: sshd (1488) PC=0x000410e0 Instr=0xe1c720d8 Address=0x00d9be9c FSR 0x001 Jan 19 22:01:52 kernel: [21432.387853] Alignment trap: sshd (1488) PC=0x000410f0 Instr=0xe1c620f8 Address=0x00da3ea4 FSR 0x801 Jan 19 22:01:52 kernel: [21432.387863] Alignment trap: sshd (1488) PC=0x000410c0 Instr=0xe1c700d0 Address=0x00d9bea4 FSR 0x001 Jan 19 22:01:52 kernel: [21432.387873] Alignment trap: sshd (1488) PC=0x000410d8 Instr=0xe1c620f0 Address=0x00da3eac FSR 0x801 Jan 19 22:01:52 kernel: [21432.387882] Alignment trap: sshd (1488) PC=0x000410e0 Instr=0xe1c720d8 Address=0x00d9beac FSR 0x001 Jan 19 22:01:52 kernel: [21432.387892] Alignment trap: sshd (1488) PC=0x000410f0 Instr=0xe1c620f8 Address=0x00da3eb4 FSR 0x801 USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1359 0.0 0.2 4564 1468 ? Ss 16:05 0:00 /usr/sbin/sshd -D -f /etc/ssh/sshd_config root 1488 0.0 0.4 40732 2356 ? Ssl 16:26 0:00 \_ sshd: root@pts/0 root 1496 0.0 0.3 5452 1844 pts/0 Ss 16:26 0:00 \_ -bash Alignment issue handling is configured on kernel side to be reported and fixed: echo 3 > /proc/cpu/alignment net-misc/openssh-6.4_p1-r1 USE="hpn -X -X509 -bindist -kerberos -ldap -ldns -libedit -pam (-selinux) -skey -static -tcpd" Reproducible: Always Portage 2.2.7 (default/linux/arm/13.0, gcc-4.7.3, glibc-2.16.0, 3.7.2-sheeva+ armv5tel) ================================================================= System uname: Linux-3.7.2-sheeva+-armv5tel-Feroceon_88FR131_rev_1_-v5l-with-gentoo-2.2 KiB Mem: 514676 total, 19168 free KiB Swap: 0 total, 0 free Timestamp of tree: Sat, 18 Jan 2014 14:00:01 +0000 ld GNU ld (GNU Binutils) 2.23.2 app-shells/bash: 4.2_p45 dev-lang/python: 2.7.5-r3 dev-util/cmake: 2.8.11.2 dev-util/pkgconfig: 0.28 sys-apps/baselayout: 2.2::unspecified sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.69 sys-devel/automake: 1.11.6, 1.13.4 sys-devel/binutils: 2.23.2 sys-devel/gcc: 4.7.3-r1 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4.2 sys-devel/make: 3.82-r4 sys-kernel/linux-headers: 3.9 (virtual/os-headers) sys-libs/glibc: 2.16.0 Repositories: gentoo location: /var/lib/portage/portage sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 unspecified location: /var/lib/portage/overlay masters: gentoo priority: 0 ACCEPT_KEYWORDS="arm" ACCEPT_LICENSE="* -@EULA" ACCEPT_PROPERTIES="*" ACCEPT_RESTRICT="*" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" ARCH="arm" AUTOCLEAN="yes" BOOTSTRAP_USE="cxx unicode python_targets_python3_3 python_targets_python2_7" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" CBUILD="armv5tel-softfloat-linux-gnueabi" CFLAGS="-O2 -march=armv5te -mtune=xscale -pipe -Wall" CHOST="armv5tel-softfloat-linux-gnueabi" CLEAN_DELAY="5" COLLECTD_PLUGINS="apache bind cpu cpufreq disk df filecount hddtemp irq load memory mysql netlink network ntpd nut ping processes rrd rrdcached rrdtool snmp swap syslog tail tcpconns unixsock users match_timediff match_regex" COLLISION_IGNORE="/lib/modules/* *.py[co] *$py.class */dropin.cache" CONFIG_PROTECT="/etc /var/bind" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.5/ext-active/ /etc/php/cgi-php5.5/ext-active/ /etc/php/cli-php5.5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -march=armv5te -mtune=xscale -pipe -Wall" DISTDIR="/var/lib/portage/distfiles" EDITOR="/usr/bin/vim" ELIBC="glibc" EMERGE_DEFAULT_OPTS="--ask --verbose -b" EMERGE_WARNING_DELAY="10" EPREFIX="" EROOT="/" FCFLAGS="-O2" FEATURES="assume-digests binpkg-logs buildpkg config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FETCHCOMMAND="wget -t 3 -T 60 --passive-ftp -O "${DISTDIR}/${FILE}" "${URI}"" FETCHCOMMAND_RSYNC="rsync -avP "${URI}" "${DISTDIR}/${FILE}"" FETCHCOMMAND_SFTP="bash -c "x=\${2#sftp://} ; host=\${x%%/*} ; port=\${host##*:} ; host=\${host%:*} ; [[ \${host} = \${port} ]] && port=22 ; eval \"declare -a ssh_opts=(\${3})\" ; exec sftp -P \${port} \"\${ssh_opts[@]}\" \"\${host}:/\${x#*/}\" \"\$1\"" sftp "${DISTDIR}/${FILE}" "${URI}" "${PORTAGE_SSH_OPTS}"" FETCHCOMMAND_SSH="bash -c "x=\${2#ssh://} ; host=\${x%%/*} ; port=\${host##*:} ; host=\${host%:*} ; [[ \${host} = \${port} ]] && port=22 ; exec rsync --rsh=\"ssh -p\${port} \${3}\" -avP \"\${host}:/\${x#*/}\" \"\$1\"" rsync "${DISTDIR}/${FILE}" "${URI}" "${PORTAGE_SSH_OPTS}"" FFLAGS="-O2" GCC_SPECS="" GENTOO_MIRRORS="ftp://gentoo.inode.at/source/" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" GRUB_PLATFORMS="" HOME="/root" INFOPATH="/usr/share/info:/usr/share/gcc-data/armv5tel-softfloat-linux-gnueabi/4.7.3/info:/usr/share/binutils-data/armv5tel-softfloat-linux-gnueabi/2.23.2/info" INPUT_DEVICES="" IUSE_IMPLICIT="prefix" KERNEL="linux" LANG="en_US.UTF8" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LC_MESSAGES="C" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LESS="-R -M --shift 5" LESSOPEN="|lesspipe %s" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en fr de" LS_COLORS="rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=01;05;37;41:mi=01;05;37;41:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arj=01;31:*.taz=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lz=01;31:*.xz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.pdf=00;32:*.ps=00;32:*.txt=00;32:*.patch=00;32:*.diff=00;32:*.log=00;32:*.tex=00;32:*.doc=00;32:*.aac=00;36:*.au=00;36:*.flac=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.axa=00;36:*.oga=00;36:*.spx=00;36:*.xspf=00;36:" MANPATH="/usr/local/share/man:/usr/share/man:/usr/share/gcc-data/armv5tel-softfloat-linux-gnueabi/4.7.3/man:/usr/share/binutils-data/armv5tel-softfloat-linux-gnueabi/2.23.2/man:/usr/lib/php5.5/man/" MULTIOSDIRS="." NETBEANS="apisupport cnd groovy gsf harness ide identity j2ee java mobility nb php profiler soa visualweb webcommon websvccommon xml" NGINX_MODULES_HTTP="access auth_basic autoindex fastcgi geoip gzip headers_more limit_req limit_conn map rewrite spdy ssi stub_status upstream_ip_hash xslt" OFFICE_IMPLEMENTATION="libreoffice" PAGER="/usr/bin/less" PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/bin:/usr/armv5tel-softfloat-linux-gnueabi/gcc-bin/4.7.3" PHP_TARGETS="php5-5" PKGDIR="/var/lib/portage/packages" PORTAGE_ARCHLIST="ppc sparc64-freebsd ppc-openbsd x86-openbsd ppc64 x86-winnt x86-fbsd ppc-aix alpha arm x86-freebsd s390 amd64 arm-linux x86-macos x64-openbsd ia64-hpux hppa x86-netbsd ppc64-linux x86-cygwin amd64-linux ia64-linux x86 sparc-solaris x64-freebsd sparc64-solaris x86-linux x64-macos sparc m68k-mint ia64 mips ppc-macos x86-interix hppa-hpux amd64-fbsd x64-solaris m68k sh arm64 x86-solaris sparc-fbsd" PORTAGE_BIN_PATH="/usr/lib/portage/bin" PORTAGE_COMPRESS_EXCLUDE_SUFFIXES="css gif htm[l]? jp[e]?g js pdf png" PORTAGE_CONFIGROOT="/" PORTAGE_DEBUG="0" PORTAGE_DEPCACHEDIR="/var/cache/edb/dep" PORTAGE_ELOG_CLASSES="warn error log" PORTAGE_ELOG_MAILFROM="portage@localhost" PORTAGE_ELOG_MAILSUBJECT="[portage] ebuild log for ${PACKAGE} on ${HOST}" PORTAGE_ELOG_MAILURI="root" PORTAGE_ELOG_SYSTEM="save" PORTAGE_FETCH_CHECKSUM_TRY_MIRRORS="5" PORTAGE_FETCH_RESUME_MIN_SIZE="350K" PORTAGE_GID="250" PORTAGE_GPG_SIGNING_COMMAND="gpg --sign --digest-algo SHA256 --clearsign --yes --default-key "${PORTAGE_GPG_KEY}" --homedir "${PORTAGE_GPG_DIR}" "${FILE}"" PORTAGE_INST_GID="0" PORTAGE_INST_UID="0" PORTAGE_INTERNAL_CALLER="1" PORTAGE_NICENESS="10" PORTAGE_OVERRIDE_EPREFIX="" PORTAGE_PYM_PATH="/usr/lib/portage/pym" PORTAGE_PYTHONPATH="/usr/lib/portage/pym" PORTAGE_REPOSITORIES="[DEFAULT] main-repo = gentoo [gentoo] location = /var/lib/portage/portage masters = priority = -1000 sync-type = rsync sync-uri = rsync://rsync.gentoo.org/gentoo-portage [unspecified] location = /var/lib/portage/overlay masters = gentoo priority = 0 " 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" PORTAGE_RSYNC_RETRIES="-1" PORTAGE_SYNC_STALE="30" PORTAGE_TMPDIR="/var/tmp" PORTAGE_VERBOSE="1" PORTAGE_WORKDIR_MODE="0700" PORTAGE_XATTR_EXCLUDE="security.* system.nfs4_acl" PORTDIR="/var/lib/portage/portage" PORTDIR_OVERLAY="/var/lib/portage/overlay" PORT_LOGDIR_CLEAN="find "${PORT_LOGDIR}" -type f ! -name "summary.log*" -mtime +7 -delete" PROFILE_ONLY_VARIABLES="ARCH ELIBC IUSE_IMPLICIT KERNEL USERLAND USE_EXPAND_IMPLICIT USE_EXPAND_UNPREFIXED USE_EXPAND_VALUES_ARCH USE_EXPAND_VALUES_ELIBC USE_EXPAND_VALUES_KERNEL USE_EXPAND_VALUES_USERLAND" PWD="/root" PYTHONDONTWRITEBYTECODE="1" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7" RESUMECOMMAND="wget -c -t 3 -T 60 --passive-ftp -O "${DISTDIR}/${FILE}" "${URI}"" RESUMECOMMAND_RSYNC="rsync -avP "${URI}" "${DISTDIR}/${FILE}"" RESUMECOMMAND_SSH="bash -c "x=\${2#ssh://} ; host=\${x%%/*} ; port=\${host##*:} ; host=\${host%:*} ; [[ \${host} = \${port} ]] && port=22 ; exec rsync --rsh=\"ssh -p\${port} \${3}\" -avP \"\${host}:/\${x#*/}\" \"\$1\"" rsync "${DISTDIR}/${FILE}" "${URI}" "${PORTAGE_SSH_OPTS}"" ROOT="/" ROOTPATH="/opt/bin:/usr/armv5tel-softfloat-linux-gnueabi/gcc-bin/4.7.3" RPMDIR="/usr/portage/rpm" RUBY_TARGETS="ruby19 ruby18" SHLVL="1" TERM="xterm" TMPDIR="/tmp" UNINSTALL_IGNORE="/lib/modules/*" USE="acl apache2 arm bzip2 caps cxx ftp iconv idn ipv6 mmap modules mudflap mysql ncurses nptl openmp pcre posix readline ssl syslog unicode xattr xml xsl zlib" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="apache bind cpu cpufreq disk df filecount hddtemp irq load memory mysql netlink network ntpd nut ping processes rrd rrdcached rrdtool snmp swap syslog tail tcpconns unixsock users match_timediff match_regex" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en fr de" NGINX_MODULES_HTTP="access auth_basic autoindex fastcgi geoip gzip headers_more limit_req limit_conn map rewrite spdy ssi stub_status upstream_ip_hash xslt" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7" RUBY_TARGETS="ruby19 ruby18" USERLAND="GNU" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" USERLAND="GNU" USE_EXPAND="ABI_MIPS ABI_X86 ALSA_CARDS APACHE2_MODULES APACHE2_MPMS CALLIGRA_FEATURES CAMERAS COLLECTD_PLUGINS CROSSCOMPILE_OPTS CURL_SSL DRACUT_MODULES DVB_CARDS ELIBC ENLIGHTENMENT_MODULES FCDSL_CARDS FFTOOLS FOO2ZJS_DEVICES FRITZCAPI_CARDS GPSD_PROTOCOLS GRUB_PLATFORMS INPUT_DEVICES KERNEL LCD_DEVICES LIBREOFFICE_EXTENSIONS LINGUAS LIRC_DEVICES MONKEYD_PLUGINS NETBEANS_MODULES NGINX_MODULES_HTTP NGINX_MODULES_MAIL OFED_DRIVERS OFFICE_IMPLEMENTATION OPENMPI_FABRICS OPENMPI_OFED_FEATURES OPENMPI_RM PHP_TARGETS PYTHON_SINGLE_TARGET PYTHON_TARGETS QEMU_SOFTMMU_TARGETS QEMU_USER_TARGETS RUBY_TARGETS SANE_BACKENDS USERLAND UWSGI_PLUGINS VIDEO_CARDS VOICEMAIL_STORAGE XFCE_PLUGINS XTABLES_ADDONS" USE_EXPAND_HIDDEN="ABI_MIPS ABI_X86 CROSSCOMPILE_OPTS ELIBC KERNEL USERLAND" USE_EXPAND_IMPLICIT="ARCH ELIBC KERNEL USERLAND" USE_EXPAND_UNPREFIXED="ARCH" USE_EXPAND_VALUES_ARCH="alpha amd64 amd64-fbsd amd64-linux arm arm-linux arm64 hppa hppa-hpux ia64 ia64-hpux ia64-linux m68k m68k-mint mips ppc ppc64 ppc64-linux ppc-aix ppc-macos ppc-openbsd s390 sh sparc sparc64-freebsd sparc64-solaris sparc-fbsd sparc-solaris x64-freebsd x64-macos x64-openbsd x64-solaris x86 x86-cygwin x86-fbsd x86-freebsd x86-interix x86-linux x86-macos x86-netbsd x86-openbsd x86-solaris x86-winnt" USE_EXPAND_VALUES_ELIBC="AIX Cygwin Darwin FreeBSD glibc HPUX Interix mintlib musl NetBSD OpenBSD SunOS uclibc Winnt" USE_EXPAND_VALUES_KERNEL="AIX Cygwin Darwin FreeBSD freemint HPUX Interix linux NetBSD OpenBSD SunOS Winnt" USE_EXPAND_VALUES_USERLAND="BSD GNU" USE_ORDER="env:pkg:conf:defaults:pkginternal:repo:env.d" VIDEO_CARDS="" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" _="/usr/bin/emerge"
can you try building with USE=-hpn ?
(In reply to SpanKY from comment #1) > can you try building with USE=-hpn ? This is indeed the cause. Check out CIPHER_BYTE_XOR in cipher-ctr-mt.c after the HPN patch is applied. The code is supposed to work with 8-byte load/xor/store, but something is misaligned. I don't particularly like punting and defining CIPHER_BYTE_XOR when the regular path was supposed to handle this.
*** Bug 499552 has been marked as a duplicate of this bug. ***
(In reply to SpanKY from comment #1) > can you try building with USE=-hpn ? Confirmed here as well that USE=-hpn prevents the mis-aligned accesses (and thus traps).
looking at the history, this code has always been this way. not sure what has changed such that newer versions complain while older ones work OK.
should be all set now in the tree; thanks for the report! Commit message: Avoid unaligned loads/stores in USE=hpn cipher code http://sources.gentoo.org/net-misc/openssh/files/openssh-6.5_p1-hpn-cipher-align.patch?rev=1.1 http://sources.gentoo.org/net-misc/openssh/openssh-6.5_p1-r1.ebuild?rev=1.1
