Control: severity -1 important Askar Safin <safinas...@mail.ru> (2014-09-21): > Package: debootstrap > Version: 1.0.48+deb7u1 > Severity: grave > > debootstrap doesn't unmount /proc and /sys (on my Debian GNU/Linux) > if caught Ctrl-C in unpacking stage. > > I started debootstrap, then I changed my mind, pressed Ctrl-C and > then decided to delete target (let's assume it is /tmp/wheezy). I > typed "rm -r /tmp/wheezy", and then unexpectedly I saw the > following: > > rm: cannot remove `/tmp/wheezy/proc/asound/PCH': Operation not permitted > rm: cannot remove `/tmp/wheezy/proc/asound/card0/id': Operation not permitted > rm: cannot remove `/tmp/wheezy/proc/asound/card0/codec#0': Operation not > permitted > [...] > rm: cannot remove `/tmp/wheezy/proc/1/mem': Permission denied > rm: cannot remove `/tmp/wheezy/proc/1/cwd': Permission denied > rm: cannot remove `/tmp/wheezy/proc/1/root': Permission denied > rm: cannot remove `/tmp/wheezy/proc/1/exe': Permission denied > rm: cannot remove `/tmp/wheezy/proc/1/mounts': Permission denied > [...] > > This is very frustrating output. It is similar to output of the "rm > -rf /*" command, so I was scared and I decided then I am deleting > all my files. Then I discovered that the files are safe. (But I > think this is possible that "rm -r /tmp/wheezy/proc /tmp/wheezy/sys" > somehow damages host system.)
Hi, and thanks for your report. Well, debootstrap mostly performs the initial bootstraping, so I don't think it would be introducing things like bind mounts which would then endanger the root filesystem. While it probably isn't too difficult to catch signals and do some clean-up like unmounting filesystems, I don't think failing to do so is a serious bug (important at most), and I'm lowering the severity accordingly. FWIW/IMHO: deciding to remove a chroot should always be accompanied with checking (bind-)mounted filesystems. Mraw, KiBi.
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