Bug 886189 – app-emulation/qemu-7.2.0: sandbox violation on calling 'gdb --version' with sys-devel/gdb-13

• Product: Gentoo Linux
• Status: RESOLVED FIXED

[Description Sam James 2022-12-16 03:40:04 UTC]

Created attachment 842943 [details]
build.log

```
Running postconf script '/usr/bin/python3.11 /var/tmp/portage/app-emulation/qemu-7.2.0/work/qemu-7.2.0/scripts/symlink-install-tree.py'
../configure --prefix=/usr --sysconfdir=/etc --bindir=/usr/bin --libdir=/usr/lib64 --datadir=/usr/share --docdir=/usr/share/doc/qemu-7.2.0/html --mandir=/usr/share/man --localstatedir=/var --disable-bsd-user --disable-containers --disable-guest-agent --disable-strip --with-git-submodules=ignore --disable-tcg-interpreter --disable-werror --disable-gcrypt --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --host-cc=x86_64-pc-linux-gnu-gcc --enable-alsa --disable-debug-info --disable-debug-tcg --disable-jack --enable-gettext --enable-oss --disable-plugins --enable-pa --disable-selinux --enable-attr --disable-brlapi --enable-linux-aio --disable-bpf --enable-bzip2 --disable-capstone --enable-curl --disable-docs --enable-fdt --disable-fuse --disable-glusterfs --enable-gnutls --enable-nettle --enable-gtk --disable-rdma --disable-libiscsi --disable-linux-io-uring --enable-vnc-jpeg --enable-kvm --disable-lzo --disable-mpath --enable-curses --disable-libnfs --disable-numa --enable-opengl --enable-auth-pam --enable-png --disable-rbd --disable-vnc-sasl --enable-sdl --disable-sdl-image --enable-slirp --disable-smartcard --disable-snappy --disable-spice --disable-libssh --enable-libudev --enable-libusb --disable-usb-redir --disable-vde --enable-vhost-net --disable-virglrenderer --disable-virtfs --enable-vnc --disable-vte --disable-xen --disable-xen-pci-passthrough --disable-xkbcommon --disable-zstd --audio-drv-list=pa,sdl,alsa,oss --disable-linux-user --disable-system --disable-blobs --enable-tools --enable-cap-ng --enable-seccomp --target-list= --enable-pie
 * ACCESS DENIED:  open_wr:       /proc/self/mem
/usr/sbin/gdb: warning: opening /proc/self/mem file failed: Permission denied (13)
The Meson build system
Version: 1.0.0.rc1
```


```
Found ninja-1.11.1 at /usr/sbin/ninja
Running postconf script '/usr/bin/python3.11 /var/tmp/portage/app-emulation/qemu-7.2.0/work/qemu-7.2.0/scripts/symlink-install-tree.py'
>>> Source configured.
 * ----------------------- SANDBOX ACCESS VIOLATION SUMMARY -----------------------
 * LOG FILE: "/var/tmp/portage/app-emulation/qemu-7.2.0/temp/sandbox.log"
 *
VERSION 1.0
FORMAT: F - Function called
FORMAT: S - Access Status
FORMAT: P - Path as passed to function
FORMAT: A - Absolute Path (not canonical)
FORMAT: R - Canonical Path
FORMAT: C - Command Line

F: open_wr
S: deny
P: /proc/self/mem
A: /proc/self/mem
R: /proc/2166/mem
C: /usr/sbin/gdb --version

F: open_wr
S: deny
P: /proc/self/mem
A: /proc/self/mem
R: /proc/7686/mem
C: /usr/sbin/gdb --version

F: open_wr
S: deny
P: /proc/self/mem
A: /proc/self/mem
R: /proc/12736/mem
C: /usr/sbin/gdb --version
 * --------------------------------------------------------------------------------
```

----

$ emerge --info
Portage 3.0.41 (python 3.11.1-final-0, default/linux/amd64/17.1/hardened, gcc-12, glibc-2.36-r6, 5.15.83-gentoo-dist-hardened x86_64)
=================================================================
System uname: Linux-5.15.83-gentoo-dist-hardened-x86_64-AMD_Ryzen_9_3950X_16-Core_Processor-with-glibc2.36
KiB Mem:    65765148 total,  13482044 free
KiB Swap:    8290300 total,   8283900 free
Timestamp of repository gentoo: Fri, 16 Dec 2022 01:47:10 +0000
Head commit of repository gentoo: 0af8b710996a45ea3cd96cca15a1774b1caee9a9

Timestamp of repository emacs: Tue, 06 Dec 2022 22:03:17 +0000
Head commit of repository emacs: f6406ba23eaffd28f75daff4b0a2206289ce1ec0

Timestamp of repository kde: Wed, 14 Dec 2022 20:46:55 +0000
Head commit of repository kde: 7e538a185d31a8c237dd881ee009ce5327eeb37c

Timestamp of repository qt: Wed, 14 Dec 2022 10:32:35 +0000
Head commit of repository qt: 777f2b213b676cf4c550e50517f8bd333084df56

Timestamp of repository sam_c: Wed, 14 Dec 2022 10:32:54 +0000
Head commit of repository sam_c: 576c807159519f2b55d631a97ac773ea5dddc885

Timestamp of repository steam-overlay: Wed, 14 Dec 2022 10:32:37 +0000
Head commit of repository steam-overlay: b5bba5c7fa7bd544112878128e8d0dba968a10e1

sh dash 0.5.12
ld GNU ld (Gentoo 2.39 p5) 2.39.0
ccache version 4.7.4 [disabled]
app-misc/pax-utils:        1.3.5::gentoo
app-shells/bash:           5.2_p15::gentoo
dev-java/java-config:      2.3.1::gentoo
dev-lang/perl:             5.36.0-r1::gentoo
dev-lang/python:           3.8.16::gentoo, 3.9.16::gentoo, 3.10.9::gentoo, 3.11.1::gentoo, 3.12.0_alpha3-r1::gentoo
dev-lang/rust:             1.65.0::gentoo
dev-util/ccache:           4.7.4::gentoo
dev-util/cmake:            3.25.1::gentoo
dev-util/meson:            1.0.0_rc1::gentoo
sys-apps/baselayout:       2.9::gentoo
sys-apps/sandbox:          2.29::gentoo
sys-apps/systemd:          252.3::gentoo
sys-devel/autoconf:        2.13-r7::gentoo, 2.71-r5::gentoo
sys-devel/automake:        1.16.5::gentoo
sys-devel/binutils:        2.39-r4::gentoo
sys-devel/binutils-config: 5.4.1::gentoo
sys-devel/clang:           14.0.6-r1::gentoo, 15.0.6::gentoo, 16.0.0_pre20221210::gentoo
sys-devel/gcc:             9.5.0::gentoo, 10.4.1_p20221208::gentoo, 11.3.1_p20221209::gentoo, 12.2.1_p20221210::gentoo, 13.0.0_pre20221211::gentoo
sys-devel/gcc-config:      2.8::gentoo
sys-devel/libtool:         2.4.7-r1::gentoo
sys-devel/lld:             15.0.6::gentoo, 16.0.0_pre20221210::gentoo
sys-devel/llvm:            14.0.6-r2::gentoo, 15.0.6::gentoo, 16.0.0_pre20221210::gentoo
sys-devel/make:            4.4::gentoo
sys-kernel/linux-headers:  6.0::gentoo (virtual/os-headers)
sys-libs/glibc:            2.36-r6::gentoo
Repositories:

gentoo
    location: /var/db/repos/gentoo
    sync-type: git
    sync-uri: https://github.com/gentoo-mirror/gentoo.git
    priority: -1000
    eclass-overrides: sam_c
    sync-git-clone-extra-opts: -b stable -c gc.reflogExpire=0 -c gc.reflogExpireUnreachable=0 -c gc.rerereresolved=0 -c gc.rerereunresolved=0 -c gc.pruneExpire=now
    sync-git-verify-commit-signature: yes

crossdev
    location: /var/db/repos/crossdev
    masters: gentoo
    eclass-overrides: sam_c

emacs
    location: /var/db/repos/emacs
    sync-type: git
    sync-uri: https://github.com/gentoo-mirror/emacs.git
    masters: gentoo
    eclass-overrides: sam_c

kde
    location: /var/db/repos/kde
    sync-type: git
    sync-uri: https://github.com/gentoo-mirror/kde.git
    masters: gentoo
    eclass-overrides: sam_c

local
    location: /var/db/repos/local
    masters: gentoo
    eclass-overrides: sam_c

qt
    location: /var/db/repos/qt
    sync-type: git
    sync-uri: https://github.com/gentoo-mirror/qt.git
    masters: gentoo
    eclass-overrides: sam_c

sam_c
    location: /var/db/repos/sam_c
    sync-type: git
    sync-uri: https://github.com/gentoo-mirror/sam_c.git
    masters: gentoo
    eclass-overrides: sam_c

steam-overlay
    location: /var/db/repos/steam-overlay
    sync-type: git
    sync-uri: https://github.com/gentoo-mirror/steam-overlay.git
    masters: gentoo
    eclass-overrides: sam_c

test
    location: /var/db/repos/test
    masters: gentoo
    eclass-overrides: sam_c

ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="@FREE"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -march=native -fdiagnostics-color=always -frecord-gcc-switches -Wreturn-type"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /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/php/apache2-php8.2/ext-active/ /etc/php/cgi-php8.2/ext-active/ /etc/php/cli-php8.2/ext-active/ /etc/php/fpm-php8.2/ext-active/ /etc/php/phpdbg-php8.2/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-O2 -pipe -march=native -fdiagnostics-color=always -frecord-gcc-switches -Wreturn-type -D_GLIBCXX_ASSERTIONS"
DISTDIR="/var/cache/distfiles"
EMERGE_DEFAULT_OPTS="--keep-going --with-bdeps=y --complete-graph --deep --dynamic-deps=n --changed-deps=n --usepkg-exclude sys-fs/zfs --usepkg-exclude sys-fs/zfs-kmod --usepkg=y --implicit-system-deps=n --jobs=4 --load-average 32"
ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY 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 -march=native -fdiagnostics-color=always -frecord-gcc-switches -Wreturn-type"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs buildpkg cgroup clean-logs config-protect-if-modified distlocks fixlafiles ipc-sandbox mount-sandbox multilib-strict network-sandbox news parallel-fetch parallel-install pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms split-log strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe -march=native -fdiagnostics-color=always -frecord-gcc-switches -Wreturn-type"
GENTOO_MIRRORS="http://mirror.bytemark.co.uk/gentoo/ http://www.mirrorservice.org/sites/distfiles.gentoo.org/ http://mirrors.soeasyto.com/distfiles.gentoo.org/"
LANG="en_GB.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--defsym=__gentoo_check_ldflags__=0 -Wl,-z,pack-relative-relocs"
LEX="reflex"
LINGUAS="en en_GB"
PKGDIR="/var/cache/binpkgs"
PORTAGE_BUNZIP2_COMMAND="lbunzip2"
PORTAGE_COMPRESS="xz"
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="/var/tmp"
RUSTFLAGS="-C target-cpu=native"
SHELL="/bin/bash"
USE="PIC X a52 aac acl acpi activities aes alsa amd64 avx avx2 bash-completion bluetooth branding bzip2 cairo caps cdda cdr clang cli crypt dbus declarative dist-kernel dri dts dvd dvdr emacs encode exif f16c filecaps firewalld flac fma3 fortran freetype gdbm gif gmp gpm graphite gtk gui hardened harfbuzz hunspell iconv icu ipv6 jit jpeg kde kdesu kwallet lcms libglvnd libnotify libtirpc llvm-libunwind lto mad mmx mmxext mng mp3 mp4 mpeg multilib ncurses nftables nls nptl ogg opengl openmp pam pango pclmul pcre pdf pgo pie pipewire plasma png policykit popcnt ppds pulseaudio qml qt5 rdrand readline screencast sdl seccomp semantic-desktop sha spell sse sse2 sse3 sse4_1 sse4_2 sse4a ssl ssp ssse3 startup-notification svg system-av1 system-binutils system-boost system-bootstrap system-cairo system-clang system-digest system-ffmpeg system-harfbuzz system-heimdal system-icu system-jpeg system-leveldb system-libevent system-libs system-libvpx system-libyaml system-llvm system-lz4 system-mitkrb5 system-sqlite system-ssl system-tbb system-uulib system-webp system-zlib systemd test-rust tiff truetype udev udisks unicode upower usb verify-sig vorbis vulkan wayland widgets x264 xattr xcb xml xtpax xv xvid zfs zlib zsh-completion" ABI_X86="32 64" ADA_TARGET="gnat_2021" 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="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 rdrand sha sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="libinput" KERNEL="linux" L10N="en en-GB" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LLVM_TARGETS="X86 AArch64 AMDGPU ARM AVR BPF Hexagon Lanai MSP430 Mips NVPTX PowerPC RISCV Sparc SystemZ WebAssembly XCore" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-4 php8-0" POSTGRES_TARGETS="postgres12 postgres13" PYTHON_SINGLE_TARGET="python3_10" PYTHON_TARGETS="python3_10 pypy3 python3_11 python3_8 python3_9" QEMU_USER_TARGETS="aarch64 aarch64_be alpha armeb hppa m68k ppc ppc64 ppc64le sparc sparc64" RUBY_TARGETS="ruby31" USERLAND="GNU" VIDEO_CARDS="amdgpu radeonsi radeon" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq proto steal rawnat logmark ipmark dhcpmac delude chaos account"
YACC="byacc"
Unset:  ADDR2LINE, AR, ARFLAGS, AS, ASFLAGS, CC, CCLD, CONFIG_SHELL, CPP, CPPFLAGS, CTARGET, CXX, CXXFILT, ELFEDIT, EXTRA_ECONF, F77FLAGS, FC, GCOV, GPROF, INSTALL_MASK, LC_ALL, LD, LFLAGS, LIBTOOL, MAKE, MAKEFLAGS, MAKEOPTS, NM, OBJCOPY, OBJDUMP, PORTAGE_BINHOST, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, RANLIB, READELF, SIZE, STRINGS, STRIP, YFLAGS

[Comment 1 Sam James 2022-12-16 03:40:32 UTC]

Created attachment 842945 [details]
sandbox.log

[Comment 2 Sam James 2022-12-16 04:20:26 UTC]

https://gitlab.com/qemu-project/qemu/-/blob/master/configure#L2395

[Comment 3 Sam James 2022-12-16 06:50:59 UTC]

Ah, it's an issue w/ upcoming gdb 13.

```
commit 1bcb0708f22956d5128a2e75df6eba5a18327892
Author: Pedro Alves <[e-mail]>
Date:   Thu Jul 21 19:11:16 2022 +0100

    gdb/linux-nat: Check whether /proc/pid/mem is writable

    Probe whether /proc/pid/mem is writable, by using it to write to a GDB
    variable.  This will be used in the following patch to avoid falling
    back to writing to inferior memory with ptrace if /proc/pid/mem _is_
    writable.

    Change-Id: If87eff0b46cbe5e32a583e2977a9e17d29d0ed3
```

It unconditionally checks even for --version, I guess.

[Comment 4 Larry the Git Cow 2022-12-17 04:52:24 UTC]

The bug has been closed via the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=3d5fee3e5bd040b638a79de4ee903abec9de336c

commit 3d5fee3e5bd040b638a79de4ee903abec9de336c
Author:     Sam James <[e-mail]>
AuthorDate: 2022-12-17 04:52:14 +0000
Commit:     Sam James <[e-mail]>
CommitDate: 2022-12-17 04:52:14 +0000

    sys-devel/gdb: add 13.0.50_p20221217
    
    Closes: https://bugs.gentoo.org/886189
    Signed-off-by: Sam James <[e-mail]>

 sys-devel/gdb/Manifest                     |   1 +
 sys-devel/gdb/gdb-13.0.50_p20221217.ebuild | 299 +++++++++++++++++++++++++++++
 2 files changed, 300 insertions(+)