[Buildroot] sudo: error while loading shared libraries
Thomas Petazzoni
thomas.petazzoni at bootlin.com
Tue May 4 19:43:06 UTC 2021
Hello Uwe,
On Tue, 4 May 2021 11:18:59 +0000
Uwe Fechner <uwe.fechner at nl.abb.com> wrote:
> Hello,
>
> we are using buildroot on i.mx6 since a long time.
>
> Since yesterday I get the following error with the sudo package:
>
> sudo dmesg
> sudo: error while loading shared libraries: libsudo_util.so.0: cannot open shared object file: No such file or directory
>
> We are using sudo-1.9.5p2 .
>
> The library exists and the permissions seem to be correct:
>
>
> ls -la /usr/libexec/sudo
Based on the error message, it seems like the library is not dlopen()ed
but directly linked into sudo. Hwoever, /usr/libexec/sudo is not in the
default search path for libraries, and therefore unless the sudo binary
has a RPATH/RUNPATH pointing to /usr/libexec/sudo, I believe what
you're seeing is expected.
To verify this, you can try:
LD_LIBRARY_PATH=/usr/libexec/sudo sudo dmesg
Really, I think libsudo_util.so has no business in /usr/libexec/sudo,
it should be in /usr/lib. Based on the names of the other .so files,
they look like dlopen()ed libraries, which can stay in
/usr/libexec/sudo.
> total 588
> drwxr-xr-x 2 root root 4096 May 3 19:31 .
> drwxr-xr-x 11 root root 4096 May 3 19:31 ..
> -rw-r--r-- 1 root root 17716 May 3 19:31 audit_json.so
> -rw-r--r-- 1 root root 9380 May 3 19:31 group_file.so
> lrwxrwxrwx 1 root root 21 May 3 19:31 libsudo_util.so -> libsudo_util.so.0.0.0
> lrwxrwxrwx 1 root root 21 May 3 19:31 libsudo_util.so.0 -> libsudo_util.so.0.0.0
> -rwxr-xr-x 1 root root 112412 May 3 19:31 libsudo_util.so.0.0.0
> -rw-r--r-- 1 root root 5284 May 3 19:31 sample_approval.so
> -rw-r--r-- 1 root root 420184 May 3 19:31 sudoers.so
> -rw-r--r-- 1 root root 5260 May 3 19:31 sudo_noexec.so
> -rw-r--r-- 1 root root 5276 May 3 19:31 system_group.so
>
> Any idea?
Best regards,
Thomas
--
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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