[Bug 2133797] [NEW] stat fails in a chroot

[Juerg Haefliger]

Public bug reported:

Running 'stat' from coreutils-from-uutils in a chroot fails:

$ lsb_release -d
Description:	Ubuntu 25.10
$ stat /
stat: cannot read table of mounted file systems: No such file or directory

Works fine on Plucky with 'stat' from legacy coreutils:

# lsb_release -d
Description:	Ubuntu 25.04
root at gollum:~# stat /
  File: /
  Size: 4096      	Blocks: 8          IO Block: 4096   directory
Device: 259,7	Inode: 8785791     Links: 17
Access: (0755/drwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2025-12-03 13:42:45.865310118 +0000
Modify: 2025-12-03 13:40:15.200144863 +0000
Change: 2025-12-03 13:40:15.200144863 +0000
 Birth: 2025-12-03 13:34:36.168250691 +0000


To reproduce:

$ sudo debootrap questing questing
$ sudo chroot questing stat /
stat: cannot read table of mounted file systems: No such file or directory


One of the side-effects of this is that grub-pc installation in a chroot fails:

# apt install grub-pc
Installing:                     
  grub-pc

Installing dependencies:
  grub-gfxpayload-lists

Summary:
  Upgrading: 0, Installing: 2, Removing: 0, Not Upgrading: 0
  Download size: 0 B / 127 kB
  Space needed: 534 kB / 519 GB available

Continue? [Y/n] 
Preconfiguring packages ...
Error: Can not write log (Is /dev/pts mounted?) - posix_openpt (19: No such device)
Selecting previously unselected package grub-pc.
(Reading database ... 14914 files and directories currently installed.)
Preparing to unpack .../grub-pc_2.14~git20250718.0e36779-1ubuntu4_amd64.deb ...
Unpacking grub-pc (2.14~git20250718.0e36779-1ubuntu4) ...
Selecting previously unselected package grub-gfxpayload-lists.
Preparing to unpack .../grub-gfxpayload-lists_0.7build2_amd64.deb ...
Unpacking grub-gfxpayload-lists (0.7build2) ...
Setting up grub-pc (2.14~git20250718.0e36779-1ubuntu4) ...
Creating config file /etc/default/grub with new version
stat: cannot read table of mounted file systems: No such file or directory
dpkg: error processing package grub-pc (--configure):
 installed grub-pc package post-installation script subprocess returned error exit status 1
dpkg: dependency problems prevent configuration of grub-gfxpayload-lists:
 grub-gfxpayload-lists depends on grub-pc (>= 1.99~20101210-1ubuntu2); however:
  Package grub-pc is not configured yet.

dpkg: error processing package grub-gfxpayload-lists (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 grub-pc
 grub-gfxpayload-lists
Error: Sub-process /usr/bin/dpkg returned an error code (1)

** Affects: coreutils-from (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2133797

Title:
  stat fails in a chroot

Status in coreutils-from package in Ubuntu:
  New

Bug description:
  Running 'stat' from coreutils-from-uutils in a chroot fails:

  $ lsb_release -d
  Description:	Ubuntu 25.10
  $ stat /
  stat: cannot read table of mounted file systems: No such file or directory

  Works fine on Plucky with 'stat' from legacy coreutils:

  # lsb_release -d
  Description:	Ubuntu 25.04
  root at gollum:~# stat /
    File: /
    Size: 4096      	Blocks: 8          IO Block: 4096   directory
  Device: 259,7	Inode: 8785791     Links: 17
  Access: (0755/drwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
  Access: 2025-12-03 13:42:45.865310118 +0000
  Modify: 2025-12-03 13:40:15.200144863 +0000
  Change: 2025-12-03 13:40:15.200144863 +0000
   Birth: 2025-12-03 13:34:36.168250691 +0000

  
  To reproduce:

  $ sudo debootrap questing questing
  $ sudo chroot questing stat /
  stat: cannot read table of mounted file systems: No such file or directory

  
  One of the side-effects of this is that grub-pc installation in a chroot fails:

  # apt install grub-pc
  Installing:                     
    grub-pc

  Installing dependencies:
    grub-gfxpayload-lists

  Summary:
    Upgrading: 0, Installing: 2, Removing: 0, Not Upgrading: 0
    Download size: 0 B / 127 kB
    Space needed: 534 kB / 519 GB available

  Continue? [Y/n] 
  Preconfiguring packages ...
  Error: Can not write log (Is /dev/pts mounted?) - posix_openpt (19: No such device)
  Selecting previously unselected package grub-pc.
  (Reading database ... 14914 files and directories currently installed.)
  Preparing to unpack .../grub-pc_2.14~git20250718.0e36779-1ubuntu4_amd64.deb ...
  Unpacking grub-pc (2.14~git20250718.0e36779-1ubuntu4) ...
  Selecting previously unselected package grub-gfxpayload-lists.
  Preparing to unpack .../grub-gfxpayload-lists_0.7build2_amd64.deb ...
  Unpacking grub-gfxpayload-lists (0.7build2) ...
  Setting up grub-pc (2.14~git20250718.0e36779-1ubuntu4) ...
  Creating config file /etc/default/grub with new version
  stat: cannot read table of mounted file systems: No such file or directory
  dpkg: error processing package grub-pc (--configure):
   installed grub-pc package post-installation script subprocess returned error exit status 1
  dpkg: dependency problems prevent configuration of grub-gfxpayload-lists:
   grub-gfxpayload-lists depends on grub-pc (>= 1.99~20101210-1ubuntu2); however:
    Package grub-pc is not configured yet.

  dpkg: error processing package grub-gfxpayload-lists (--configure):
   dependency problems - leaving unconfigured
  Errors were encountered while processing:
   grub-pc
   grub-gfxpayload-lists
  Error: Sub-process /usr/bin/dpkg returned an error code (1)

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