476278 – =sys-kernel/genkernel-next-15 sets different permissions (755) on /dev/shm than sys-kernel/genkernel; some apps, like browsers, fail due to this.

Bug 476278 - =sys-kernel/genkernel-next-15 sets different permissions (755) on /dev/shm than sys-kernel/genkernel; some apps, like browsers, fail due to this.

Summary: =sys-kernel/genkernel-next-15 sets different permissions (755) on /dev/shm th...

Status:	RESOLVED FIXED

Alias:	None

Product:	Gentoo Linux
Classification:	Unclassified
Component:	[OLD] Core system (show other bugs)
Hardware:	All Linux

Importance:	Normal normal
Assignee:	Fabio Erculiani (RETIRED)

URL:
Whiteboard:
Keywords:

Depends on:
Blocks:

Reported:	2013-07-09 12:28 UTC by Fabio Coatti
Modified:	2013-10-30 01:22 UTC (History)
CC List:	1 user (show)

See Also:
Package list:
Runtime testing required:	---

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Description Fabio Coatti 2013-07-09 12:28:26 UTC

Using for the first time sys-kernel/genkernel-next, coming from stable genkernel, I got some issues with /dev/shm directory;
basically, with new genkernel the permissions are 755 while on old genkernel the permissions are 1777.
this causes failure in several apps, most notably chrome and chromium


Reproducible: Always




Portage 2.2.0_alpha186 (default/linux/amd64/13.0/desktop/kde, gcc-4.7.3, glibc-2.17, 3.10.0 x86_64)
=================================================================
System uname: Linux-3.10.0-x86_64-Intel-R-_Core-TM-_i5-3427U_CPU_@_1.80GHz-with-gentoo-2.2
KiB Mem:     8095348 total,   3271000 free
KiB Swap:    8386556 total,   8386556 free
Timestamp of tree: Mon, 08 Jul 2013 11:15:01 +0000
ld ld di GNU (GNU Binutils) 2.23.1
app-shells/bash:          4.2_p45
dev-java/java-config:     2.2.0
dev-lang/python:          2.7.5, 3.2.5-r1, 3.3.2-r1
dev-util/cmake:           2.8.11.1
dev-util/pkgconfig:       0.28
sys-apps/baselayout:      2.2
sys-apps/openrc:          0.11.8
sys-apps/sandbox:         2.6-r1
sys-devel/autoconf:       2.13, 2.69
sys-devel/automake:       1.9.6-r3, 1.11.6, 1.12.6, 1.13.4, 1.14
sys-devel/binutils:       2.23.1
sys-devel/gcc:            4.7.3
sys-devel/gcc-config:     1.8
sys-devel/libtool:        2.4.2
sys-devel/make:           3.82-r4
sys-kernel/linux-headers: 3.9 (virtual/os-headers)
sys-libs/glibc:           2.17
Repositories: gentoo rion overlay
Installed sets: @kde
ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -mtune=native -O2 -pipe "
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/easy-rsa /usr/share/gnupg/qualified.txt /usr/share/polkit-1/actions /var/lib/hsqldb"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/splash /etc/terminfo"
CXXFLAGS="-march=native -mtune=native -O2 -pipe "
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="it_IT.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j4"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/var/lib/layman/rion /usr/overlay"
SYNC="rsync://rsync.de.gentoo.org/gentoo-portage"
USE="3dnow 3dnowext 3dnowprefetch X \ a52 aac aalib acl acpi aim alsa amd64 apng ares asf ati audio audiofile avahi bash-completion berkdb bidi bl bluetooth branding bri bzip2 cairo caps ccdda cdda cdr cjk cli consolekit cracklib crypt cups curl cxx dba dbus declarative device-mapper dga divx divx4linux dparanoia dri dts dv dvb dvd dvdr dvdread eap-sim edl embedded emboss encode ethereal exif expat faad fam fame fbcon ffmpeg fftw firefox flac force-cgi-redirect fortran ftp gallium garmin gd gdbm gif gimp gmedia gmp gnutls gphoto2 gpm gps gsm gtk h264 h323 iconv icq icu idn ifp ilbc imagemagick imap innodb ipod iproute2 ipv6 ithreads jabber jack java javascript joystick jpeg kde kipi kontact kvm lastfm lcms ldap libcaca libnotify libvirtd live lm_sensors lua lvm lxc lzma lzo mad maildir matroska mbox mdnsresponder-compat mhash mime mjpeg mmap mmx mmxext mng modules mozdevelop mozilla mp3 mp4 mpeg msn mtp mudflap multilib mysql ncurses nepomuk network networkmanager new-hpcups nfsv4 njb nls nptl nptlonly nsplugin offensive ofx ogg oggvorbis ogm openal openexr opengl openmp oscar pam pango parted pcap pcre pdf phonon php plasma plotutils png policykit ppds pulseaudio qemu qt3support qt4 readline real rtc ruby samba sasl sdl semantic-desktop session sha512 sip slang slp smartcard sndfile snmp sox speex spell srt sse sse2 ssh ssl ssse3 startup-notification svg symlink tcltk tcpd theora threads tiff tk tremor truetype udev udisks unicode upower usb utempter v4l v4l2 vaapi vcd vde vhosts video videos vim-syntax virt-network virtualbox vorbis wav webkit wifi wimax wmf wmp wps wxwidgets wxwindows x264 xanim xattr xcb xcomposite xface xft xine xinerama xml xosd xpm xscreensaver xsl xulrunner xv xvid zlib zpm" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" 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="df interface irq load memory rrdtool swap syslog" DRACUT_MODULES="plymouth crypt crypt-gpg crypt-loop btrfs syslog" 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 ubx" INPUT_DEVICES="evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="it en" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-4" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_2" QEMU_SOFTMMU_TARGETS="i386 x86_64" QEMU_USER_TARGETS="i386 x86_64" RUBY_TARGETS="ruby19 ruby18" USERLAND="GNU" VIDEO_CARDS="intel v4l" 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"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

Comment 1 Fabio Erculiani (RETIRED) gentoo-dev

2013-07-10 08:44:28 UTC

commit db68bf5d5a60b2232548dd95d1d60d3db623bd46
Author: Fabio Erculiani <lxnay@sabayon.org>
Date:   Wed Jul 10 10:42:04 2013 +0200

    Make sure to create /dev/shm with 1777, bug #476278
    
    However, this seems to affect only a small set of scenarios, since
    I don't have any problems here with ~arch openrc and systemd when
    using udev.

Comment 2 Fabio Coatti 2013-07-18 12:21:10 UTC

Maybe it's my fault, but /dev/shm still has 755 permissions. maybe it's me that I'm doing something wrong but I dont' understand exactly what...

Comment 3 Mike Auty (RETIRED) gentoo-dev

2013-10-29 18:27:32 UTC

This looks like it may still be an issue.  Swapping from genkernel-3.4.47 to genkernel-next-40 and back affects the permissions of the /dev/shm directory.  I'll do some more digging and try to find where/how it's not working correctly...

Comment 4 Mike Auty (RETIRED) gentoo-dev

2013-10-30 01:22:55 UTC

Ok,

So a little more digging turns up that the line in defaults/linuxrc of:

mount -t tmpfs none /dev/shm 2>&1

Causes tmpfs to end up with 0755 permissions rather than 1777 that most things rely on.  If using UDEV="no" this line can just be omitted, but udev appears to require this to be mounted in order to do things like unlocking drives with cryptsetup (where it hangs when this line isn't present).

I dunno whether the mount in the initramfs can support mode options, unless it's an ordering problem that breaks the permissions?  It may be worth moving the chmod line to just underneath this one...