Package: qemu Version: 1:5.2+dfsg-6 Followup-For: Bug #940533 X-Debbugs-Cc: t...@mirbsd.de, Marc Haber <mh+debian-packa...@zugschlus.de>
This bug is still pertinent. I’ve reproduced it locally right now as: # mount an RPi Debian buster image (pristine Debian/arm64, not Raspian) $ sudo losetup /dev/loop3 ~/tmp/rpi.img $ sudo kpartx -a -v /dev/loop3 $ sudo mount /dev/mapper/loop3p2 /mnt # mount extra filesystems $ mpt=/mnt $ sudo mount -t tmpfs swap "$mpt/dev/shm" $ sudo mount -t proc proc "$mpt/proc" $ sudo mount -t tmpfs swap "$mpt/tmp" $ sudo mount --bind /dev/pts "$mpt/dev/pts" # go into the chroot $ tty /dev/pts/2 $ sudo chroot /mnt su - chroot# tty /dev/pts/2 chroot# su - test chroot$ tty /dev/pts/2 chroot$ sudo id sudo: no tty present and no askpass program specified chroot$ sudo -S id [sudo] password for test: *** uid=0(root) gid=0(root) groups=0(root) zugschlus dixit: >On Tue, Sep 17, 2019 at 12:33:26AM +0200, Thorsten Glaser wrote: >> linux-user/syscall.c:open_self_stat() fills the emulated >> /proc/self/stat with a lot of 0s, > >So the contents of /proc/self/stat has the correct number of fields, but >all zeroes? chroot$ /bin/cat /proc/self/stat 8903 (cat) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1099013312 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 $ /bin/cat /proc/self/stat 8909 (cat) R 8173 8909 8173 34818 8909 4194304 83 0 0 0 0 0 0 0 20 0 1 0 2027189139 2854912 114 18446744073709551615 4198400 4215449 4292526912 0 0 0 0 0 0 0 0 0 17 2 0 0 0 0 0 4235008 4235844 8646656 4292528960 4292528985 4292528985 4292530159 0 chroot# /bin/cat /proc/self/stat 8932 (cat) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1099013472 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 So, yes. But watch this: # avoid use of mksh changing something chroot$ /bin/dash chdash$ echo $$ 8974 chdash$ cat /proc/8974/stat 8974 (dash) S 8942 8974 8173 34818 8980 4194304 666 0 1 0 7 2 0 0 20 0 2 0 2027195261 64946176 2611 18446744073709551615 134516736 138848748 4287049936 0 0 0 0 2637828 2004991739 0 0 0 17 3 0 0 5 0 0 143243668 144636888 186900480 4287053448 4287053510 4287053510 4287053806 0 Erm… but watch THIS: chdash$ cat /proc/9045/stat 9045 (cat) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1099013296 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (9045 was me lucky-guessing the pid the cat binary became) -- System Information: Debian Release: bullseye/sid APT prefers unreleased APT policy: (500, 'unreleased'), (500, 'buildd-unstable'), (500, 'unstable'), (100, 'experimental') Architecture: x32 (x86_64) Foreign Architectures: i386, amd64 Kernel: Linux 5.7.0-1-amd64 (SMP w/4 CPU threads) Kernel taint flags: TAINT_FIRMWARE_WORKAROUND Locale: LANG=C, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /bin/lksh Init: sysvinit (via /sbin/init) -- no debconf information
