[Bug 2129818] [NEW] 0.3.0 regression: ls: cannot access '/proc/self/fd/3': No such file or directory

Julian Andres Klode 2129818 at bugs.launchpad.net
Sat Oct 25 19:49:25 UTC 2025


Public bug reported:

APT's test/integration/test-no-fds-leaked-to-maintainer-scripts fails
with rust-coreutils 0.3.0

This installs a test package that does ls -l /proc/self/fd in the
maintainer scripts. The script is:

#!/bin/sh
set -x
if [ -e '$(pwd)/rootdir/tmp/read_stdin' ]; then
▸   read line;
▸   echo "STDIN: -\$line-"
fi
ls -l /proc/self/fd/
exit \$?

the tail is:

+ ls -l /proc/self/fd/
ls: cannot access '/proc/self/fd/3': No such file or directory
total 0
lr-x------ 1 root root 64 Oct 25 21:48 0 -> /dev/null
lrwx------ 1 root root 64 Oct 25 21:48 1 -> /dev/pts/4
lrwx------ 1 root root 64 Oct 25 21:48 2 -> /dev/pts/4
lr-x------ 1 root root 64 Oct 25 21:48 3
+ exit 1

This is likely related to the safe traversal feature.

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


** Tags: block-proposed

** Tags added: block-proposed

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https://bugs.launchpad.net/bugs/2129818

Title:
  0.3.0 regression: ls: cannot access '/proc/self/fd/3': No such file or
  directory

Status in rust-coreutils package in Ubuntu:
  New

Bug description:
  APT's test/integration/test-no-fds-leaked-to-maintainer-scripts fails
  with rust-coreutils 0.3.0

  This installs a test package that does ls -l /proc/self/fd in the
  maintainer scripts. The script is:

  #!/bin/sh
  set -x
  if [ -e '$(pwd)/rootdir/tmp/read_stdin' ]; then
  ▸   read line;
  ▸   echo "STDIN: -\$line-"
  fi
  ls -l /proc/self/fd/
  exit \$?

  the tail is:

  + ls -l /proc/self/fd/
  ls: cannot access '/proc/self/fd/3': No such file or directory
  total 0
  lr-x------ 1 root root 64 Oct 25 21:48 0 -> /dev/null
  lrwx------ 1 root root 64 Oct 25 21:48 1 -> /dev/pts/4
  lrwx------ 1 root root 64 Oct 25 21:48 2 -> /dev/pts/4
  lr-x------ 1 root root 64 Oct 25 21:48 3
  + exit 1

  This is likely related to the safe traversal feature.

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