On 7/23/25 9:06 AM, Dr. Werner Fink wrote:
On 2025/07/23 14:53:23 +0200, Dr. Werner Fink wrote:
The problem is the LD_PRELOAD use in the libssh test suite
with HAVE_SETRESUID and HAVE_SETRESGID enabled the call
LD_PRELOAD=/usr/lib64/libsocket_wrapper.so:/usr/lib64/libnss_wrapper.so:/usr/lib64/libuid_wrapper.so:/usr/lib64/libpam_wrapper.so:/home/abuild/rpmbuild/BUILD/libssh-test-0.11.2-build/libssh-0.11.2/build/lib/libchroot_wrapper.so:/home/abuild/rpmbuild/BUILD/libssh-test-0.11.2-build/libssh-0.11.2/build/lib/libfs_wrapper.so
./bash
Segmentation fault (core dumped)
LD_PRELOAD=/usr/lib64/libsocket_wrapper.so:/usr/lib64/libnss_wrapper.so:/usr/lib64/libuid_wrapper.so:/usr/lib64/libpam_wrapper.so:/home/abuild/rpmbuild/BUILD/libssh-test-0.11.2-build/libssh-0.11.2/build/lib/libchroot_wrapper.so:/home/abuild/rpmbuild/BUILD/libssh-test-0.11.2-build/libssh-0.11.2/build/lib/libfs_wrapper.so
./bash
does segfault whereas HAVE_SETRESUID and HAVE_SETRESGID disabled
LD_PRELOAD=/usr/lib64/libsocket_wrapper.so:/usr/lib64/libnss_wrapper.so:/usr/lib64/libuid_wrapper.so:/usr/lib64/libpam_wrapper.so:/home/abuild/rpmbuild/BUILD/libssh-test-0.11.2-build/libssh-0.11.2/build/lib/libchroot_wrapper.so:/home/abuild/rpmbuild/BUILD/libssh-test-0.11.2-build/libssh-0.11.2/build/lib/libfs_wrapper.so
strace -s 4096 -o log ./bash
abuild@noether:/mnt>
it works
Can be reduced to
LD_PRELOAD=/usr/lib64/libuid_wrapper.so ./bash
So running a version of bash configured to use a working version of
setresuid/setresgid from libc breaks (or finds a bug in) libuid_wrapper
by calling those functions.
Well, maybe you want to configure bash using the same wrapper library.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/
