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From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0) Description of problem: On RH 7.1 with kernel 2.4.4 and sh-utils sh-utils-2.0-13 with root having a blank password, 'su -' hangs, leaving an 'stty erase ?' with stat 'T'. strace says "write(2, "incorrect password", 18incorrect password)" even though password entry in shadow is BLANK. Plus, this only happens with 2.4.x - the stock kernel is fine. See http://www.chipware.net/strace- output.txt for complete strace output. Also, if I give root a password, this bug goes away. If I kill -9 the zombie stty process, the su - is unhung and a root prompt appears. How reproducible: Always Steps to Reproduce: 1. Load redhat 7.1, bare install with gcc/etc utils installed. 2. Blank root password: root::11454:0:99999:7::: 3. Compile 2.4.4 kernel, install, boot. 4. login as nonpriv user, run 'su -' Actual Results: [chip@pioneer chip]$ su - Expected Results: [chip@pioneer chip]$ su - [root@pioneer /root]# Additional info:
Looking at the strace output, this seems to be the same problem as 37615, some interoperability issue between glibc and the kernel. Update to the current kernel and glibc pacakges. *** This bug has been marked as a duplicate of 37615 ***