[tor-bugs] #33345 [Applications/rbm]: building deboootstrap-image fails with 'vsyscall attempted with vsyscall=none' in debian buster

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#33345: building deboootstrap-image fails with 'vsyscall attempted with
vsyscall=none' in debian buster
----------------------------------+-------------------
     Reporter:  pospeselr         |      Owner:  boklm
         Type:  defect            |     Status:  new
     Priority:  Medium            |  Milestone:
    Component:  Applications/rbm  |    Version:
     Severity:  Normal            |   Keywords:
Actual Points:                    |  Parent ID:
       Points:                    |   Reviewer:
      Sponsor:                    |
----------------------------------+-------------------
 When attempting to build debootstrap-image:
 {{{
 W: Failure trying to run: chroot /var/tmp/tmp.ctvHJkmxeX/base-image dpkg
 --force-depends --install /var/cache/apt/archives/base-
 passwd_3.5.26_amd64.deb
 W: See /var/tmp/tmp.ctvHJkmxeX/base-image/debootstrap/debootstrap.log for
 details
 }}}


 dmesg output:
 {{{
 [95176.669621] dpkg[24516] vsyscall attempted with vsyscall=none
 ip:ffffffffff600400 cs:33 sp:7ffc98f3a1b8 ax:ffffffffff600400 si:428720
 di:7ffc98f3a1d0
 [95176.669626] dpkg[24516]: segfault at ffffffffff600400 ip
 ffffffffff600400 sp 00007ffc98f3a1b8 error 15
 }}}

 With a bit of googling, I added vsyscall=emulate to my grub config and
 restarted to get debootstrap-image builds successfully

 This is on a relatively new debian buster install:

 uname -a
 {{{
 Linux NAME 4.19.0-8-amd64 #1 SMP Debian 4.19.98-1 (2020-01-26) x86_64
 GNU/Linux
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33345>
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