Red Hat Bugzilla – Bug 560202
pwck and grpck loop forever
Last modified: 2010-11-04 11:32:15 EDT
Description of problem: After installing virtualization pacakges and deciding to tidy up the password files, pwck -s and grpck -s just sat looping and generating very large files. Version-Release number of selected component (if applicable): shadow-utils-4.1.4.2-2.fc12.x86_64 How reproducible: Appears to be sensitive to account ordering so I'll attach copies of the password and group files that caused trouble. Steps to Reproduce: 1. Copy example files to a fresh directory and change to it. 2. Run pwck -s <example passwd file> and grpck -s <example group file>. 3. Hit CTRL-C when you have had enough and list directory contents (ls -l). Actual results: Password and group file sorts loop, producing large "{passwd,group}+" files. Expected results: Both should simply sort the respective file by user/group ID and exit. Additional info: Both utilities run as expected after manually re-ordering the files (vipw, vigr). Verified the fault exists for me with the example files attached. For reference, after running in a subdirectory of /root: [root testdir]# ls -lZ -rw-r--r--. root root system_u:object_r:etc_t:s0 group -rw-------. root root system_u:object_r:etc_t:s0 group- -rw-r--r--. root root system_u:object_r:etc_t:s0 group+ -rw-------. root root unconfined_u:object_r:admin_home_t:s0 group.lock -rw-r--r--. root root system_u:object_r:etc_t:s0 passwd -rw-------. root root system_u:object_r:etc_t:s0 passwd- -rw-r--r--. root root system_u:object_r:etc_t:s0 passwd+ -rw-------. root root unconfined_u:object_r:admin_home_t:s0 passwd.lock [root testdir]# ls -l -rw-r--r--. 1 root root 1057 2010-01-30 10:01 group -rw-------. 1 root root 1057 2010-01-30 10:01 group- -rw-r--r--. 1 root root 169189376 2010-01-30 10:02 group+ -rw-------. 1 root root 6 2010-01-30 10:02 group.lock -rw-r--r--. 1 root root 2265 2010-01-30 09:51 passwd -rw-------. 1 root root 2265 2010-01-30 09:51 passwd- -rw-r--r--. 1 root root 383266816 2010-01-30 09:51 passwd+ -rw-------. 1 root root 6 2010-01-30 09:51 passwd.lock
Created attachment 387718 [details] Failing passwd file
Created attachment 387719 [details] Failing group file
shadow-utils-4.1.4.2-2.fc12.x86_64 An gdb strace shows (gdb) where #0 __strcmp_ssse3 () at ../sysdeps/x86_64/strcmp.S:2073 #1 0x00000000004048f6 in commonio_sort_wrt (shadow=0x608da0, passwd=0x608900) at commonio.c:747 #2 0x0000000000402d68 in main (argc=<value optimized out>, argv=<value optimized out>) at pwck.c:689 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME pwck 3355 root cwd DIR 253,1 4096 98305 /root pwck 3355 root rtd DIR 253,1 4096 2 / pwck 3355 root txt REG 253,1 44096 272743 /usr/sbin/pwck pwck 3355 root mem REG 253,1 184984 133574 /lib64/ld-2.11.1.so pwck 3355 root mem REG 253,1 2410232 133580 /lib64/libc-2.11.1.so pwck 3355 root mem REG 253,1 30736 133871 /lib64/libdl-2.11.1.so pwck 3355 root mem REG 253,1 120480 171012 /lib64/libselinux.so.1 pwck 3355 root mem REG 253,1 98765792 185716 /usr/lib/locale/locale-archive pwck 3355 root 0u CHR 136,0 0t0 3 /dev/pts/0 pwck 3355 root 1u CHR 136,0 0t0 3 /dev/pts/0 pwck 3355 root 2u CHR 136,0 0t0 3 /dev/pts/0 pwck 3355 root 3wW REG 253,1 0 7599 /etc/.pwd.lock pwck 3355 root 4u REG 253,1 2845 33923 /etc/passwd pwck 3355 root 5u REG 253,1 1621 85196 /etc/shadow Am attaching an strace with passwords X'd out.
Created attachment 399221 [details] strace of the pwck while stalling.
pwck and grpck are still broken... I checked the repo "updates-testing" but there is no new version of shadow-utils... is there a change that the bug will be fixed in Fedora 12?
This message is a reminder that Fedora 12 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 12. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '12'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 12's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 12 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
Does not happen in F13. Will consider it closed next release.