test-getlogin_r segfaults with glibc 2.12

[Richard W.M. Jones]

$ EXEEXT='' srcdir='.' LOCALE_FR='fr_FR' LOCALE_FR_UTF8='fr_FR.UTF-8' 
LOCALE_JA='ja_JP' LOCALE_ZH_CN='zh_CN.GB18030' LOCALE_FR_UTF8='fr_FR.UTF-8' 
LOCALE_FR='fr_FR' LOCALE_FR_UTF8='fr_FR.UTF-8' LOCALE_JA='ja_JP' 
LOCALE_ZH_CN='zh_CN.GB18030' gdb --args ./test-getlogin_r
GNU gdb (GDB) Fedora (7.0-8.fc12)
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This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from 
/home/rjones/d/libguestfs-symlinks/daemon/tests/test-getlogin_r...done.
(gdb) run
Starting program: 
/home/rjones/d/libguestfs-symlinks/daemon/tests/test-getlogin_r 
warning: the debug information found in 
"/usr/lib/debug//lib64/libselinux.so.1.debug" does not match 
"/lib64/libselinux.so.1" (CRC mismatch).

warning: the debug information found in 
"/usr/lib/debug/lib64/libselinux.so.1.debug" does not match 
"/lib64/libselinux.so.1" (CRC mismatch).

warning: Unable to open "librpm.so.0" (librpm.so.0: cannot open shared object 
file: No such file or directory), missing debuginfos notifications will not be 
displayed
Missing separate debuginfo for /lib64/libselinux.so.1
Try: yum --enablerepo='*-debuginfo' install 
/usr/lib/debug/.build-id/4c/4b1ca2393197e6658f351112ec2ea2f32f9ced.debug
Missing separate debuginfo for /usr/lib64/libaugeas.so.0
Try: yum --enablerepo='*-debuginfo' install 
/usr/lib/debug/.build-id/e7/0f89cc8a352c8b209dc809fe2b38905bc0cabd.debug
Missing separate debuginfo for /usr/lib64/libfa.so.1
Try: yum --enablerepo='*-debuginfo' install 
/usr/lib/debug/.build-id/f9/a30854413577b7b15c216c1db96da99a271bb7.debug

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7ae77fe in __strncpy_sse2 (s1=<value optimized out>, 
    s2=<value optimized out>, n=<value optimized out>) at ./strncpy.c:83
83      *++s1 = '\0';
(gdb) bt
#0  0x00007ffff7ae77fe in __strncpy_sse2 (s1=<value optimized out>, 
    s2=<value optimized out>, n=<value optimized out>) at ./strncpy.c:83
#1  0x00007ffff7b071d2 in __getlogin_r_loginuid (name=0x7fffffffda90 "rjones", 
    namesize=0) at ../sysdeps/unix/sysv/linux/getlogin_r.c:84
#2  0x00007ffff7b07299 in getlogin_r (name=0x7fffffffda90 "rjones", namesize=0)
    at ../sysdeps/unix/sysv/linux/getlogin_r.c:103
#3  0x0000000000400948 in getlogin_r (__buflen=<value optimized out>, 
    __buf=<value optimized out>) at /usr/include/bits/unistd.h:323
#4  main (__buflen=<value optimized out>, __buf=<value optimized out>)
    at test-getlogin_r.c:76


-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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