Red Hat Bugzilla – Bug 86197
Segmentation fault in nscd, also causes rpm to fail
Last modified: 2016-11-24 10:28:16 EST
Description of problem: RPM gives a segmentation fault when installing/removing packages. An Strace indicates that NSCD is failing. Running nscd -d also gives a segmentation fault. Version-Release number of selected component (if applicable): nscd-2.2.4-13 rpm-4.0.4-7x How reproducible: Always Steps to Reproduce: 1. rpm -e <package> 2. nscd -d Actual results: Segmentation Fault Expected results: Normal operation of nscd & rpm (installation) Additional info: rpm -iUvh lynx-2.8.4-18.1.i386.rpm Preparing... ########################################### [100%] Segmentation fault Strace shows connect(8, {sin_family=AF_UNIX, path="/var/run/.nscd_socket"}, 110) = -1 ECONNREFUSED (Connection refused) nscd -d Segmentation fault strace nscd -d Shows open("/etc/ld.so.preload", O_RDONLY) = -1 ENOENT (No such file or directory) nscd -V nscd (GNU libc) 2.2.4 (nscd-2.2.4-13) /etc/init.d/nscd status nscd dead but pid file exists /etc/init.d/nscd start Starting nscd: (nothing) /etc/init.d/nscd restart Stopping nscd: [FAILED] Starting nscd: (nothing) Cannot upgrade nscd with Raw Hide version nscd-2.3.1-51.i386.rpm because RPM will not function (Chicken/Egg loop). Using lynx as an example package to install. Previously installed glibc version 2.3.1-51 packages and binutils-2.13.90.0.18-6 with no warnings. Tried extensivly searching the net for a solution to this problem/bug but couldn't find useful information. Full straces available at http://clan.tf/bug/strace.tar.gz RPM DB available at http://clan.tf/bug/rpmdb.tar.gz Other Info: Linux edgy 2.4.7-10smp #1 SMP Thu Sep 6 17:09:31 EDT 2001 i686 unknown MD5Sum for lynx package is ok. glibc packages installed (Rawhide packages): rpm -qa |grep glib glib10-1.0.6-10 glibc-common-2.3.1-51 glib-1.2.10-5 compat-glibc-6.2-2.1.3.2 glib-devel-1.2.10-5 glibc-devel-2.3.1-51 glibc-profile-2.2.4-31 glibc-2.3.1-51 RPM: rpm -qa |grep rpm rpmdb-redhat-7.2-0.20010924 gnorpm-0.96-12.7x rpm-devel-4.0.4-7x rpm-build-4.0.4-7x rpm2html-1.7-3.7x rpmlint-0.32-4 rpm-4.0.4-7x rpm-python-4.0.4-7x rpm-perl-4.0.4-7x rpmfind-1.7-4.7x
I have the same problem. nscd won't run, rpm always crashes when updating/removing, and strace shows a failure connecting to .nscd_socket. The last successfull install I did with rpm was updating to glibc-2.3.2-11.9 (and friends) and binutils-2.13.90.0.19-9. I'm currently running rpm-4.0.4-7x.18. Could this be related to Bug #85479?
Well, after much effort, I finally got things working. Because nscd was broken, I couldn't even log in remotely. Thank god xlock still let me back in and rpm2cpio still worked. I used rpm2cpio to get a working nscd, but that didn't fix rpm. Upgrading manually to rpm-4.1 didn't help; it still failed with the same segfault. Eventually, rpm-4.2-0.69 from Rawhide worked. Also required were a new libelf (from elfutils-libelf-0.76-3, also Rawhide) and a new libpopt (from popt-1.7-1.06, Redhat 8.0). Apparently the rawhide libpopt wasn't needed. Maybe the glibc package should be updated to say it conflicts with older versions of rpm and nscd. Now to go around installing the packages I manually installed to see what else I may have broken...
We actually do have a conflict defined now. In any case, the status of that old code has nothing to do with the current code base. I'm closing the bug because of that and since you apparently got it working. All heavy users of nscd are encouraged to check out the code in glibc-2.3.3-65 and later, though. Only that code has a chance to survive intense use and complicated NSS modules.