/usr/bin/ldd no longer work in package libc-bin 2.33-0ubuntu1

[Xu Zhen]

ldd no longer works in package libc-bin 2.33-0ubuntu1

$ file /bin/ls
/bin/ls: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=75a5a06981363560659178711370bb75b3146bcd, for GNU/Linux 3.2.0, stripped
$ ldd /bin/ls
 not a dynamic executable

ldd tries to run /lib{,64,x32}/ld-linux* and check whether the exit code is 127, but the exit code of the new version of them are 1.

 dummy=`$rtld 2>&1`
 if test $? = 127; then
   verify_out=`${rtld} --verify "$file"`
   ret=$?
   case $ret in
   [02]) RTLD=${rtld}; break;;
   esac
 fi

This bug is introduced by debian/patches/all/local-ldd.diff in http://ftp.ubuntu.com/ubuntu/pool/main/g/glibc/glibc_2.33-0ubuntu1.debian.tar.xz

[Xu Zhen (xuzhen666)]

Other programs that rely on ldd are also affected. For example, mkinitramfs will create an initrd file containing an empty directory /lib64, causing the system to fail to boot.

[Matthias Klose (doko)]

introduced by
https://bugs.debian.org/631242
https://bugs.debian.org/707091

        * elf/ldd.bash.in: Verify the dynamic linker is working before
        using it.

changing the patch to
dummy=`$rtld --help 2>&1`
 if test $? = 0; then

makes ldd work again. The error code 127 is not returned anymore.
unsure if we can just drop that patch.

[Matthias Klose (doko)]

fixed in -proposed

[Launchpad Janitor (janitor)]

This bug was fixed in the package glibc - 2.33-0ubuntu2

---------------
glibc (2.33-0ubuntu2) hirsute; urgency=medium

  * debian/patches/all/local-ldd.diff: Adjust extra safety check
    for changed ld-linux.so return value. LP: #1914860.

 -- Matthias Klose <email address hidden> Sat, 06 Feb 2021 13:32:05 +0100