When pam_thinkfinger module is enabled, "sudo -S -v <<< some_password" will crash right away. It appears to be libthinkfinger crashing. But the question is why sudo bother with pam at all when given the "-S" option.

This is on Ubuntu Hardy 8.0.4 with everything upto date. think_finger is at version 0.3.

The crash message is listed below:


me@mysystem:~$ sudo -S -v <<< mypassword
Password or swipe finger: 
*** glibc detected *** sudo: malloc(): memory corruption: 0x080780f8 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb7e94356]
/lib/tls/i686/cmov/libc.so.6(__libc_malloc+0x8d)[0xb7e95cad]
/lib/tls/i686/cmov/libc.so.6[0xb7eb951a]
/lib/tls/i686/cmov/libc.so.6(opendir+0x63)[0xb7eb9653]
/lib/libusb-0.1.so.4(usb_os_find_busses+0x22)[0xb7c94642]
/lib/libusb-0.1.so.4(usb_find_busses+0x1f)[0xb7c91a9f]
/usr/lib/libthinkfinger.so.0[0xb7cfe850]
/usr/lib/libthinkfinger.so.0(libthinkfinger_verify+0x67)[0xb7cfee37]
/lib/security/pam_thinkfinger.so[0xb7d027c2]
/lib/tls/i686/cmov/libpthread.so.0[0xb7c9d4fb]
/lib/tls/i686/cmov/libc.so.6(clone+0x5e)[0xb7efee5e]
======= Memory map: ========
08048000-08062000 r-xp 00000000 fe:00 788808     /usr/bin/sudo
08062000-08064000 rw-p 00019000 fe:00 788808     /usr/bin/sudo
08064000-080a8000 rw-p 08064000 00:00 0          [heap]
b6c20000-b6c21000 ---p b6c20000 00:00 0 
b6c21000-b7421000 rw-p b6c21000 00:00 0 
b7421000-b742b000 r-xp 00000000 fe:00 11599886   /lib/libgcc_s.so.1
b742b000-b742c000 rw-p 0000a000 fe:00 11599886   /lib/libgcc_s.so.1
b742c000-b742d000 ---p b742c000 00:00 0 
b742d000-b7c2d000 rw-p b742d000 00:00 0 
b7c2d000-b7c44000 r-xp 00000000 fe:00 11599906   /lib/libselinux.so.1
b7c44000-b7c46000 rw-p 00016000 fe:00 11599906   /lib/libselinux.so.1
b7c46000-b7c4f000 r-xp 00000000 fe:00 11600185   /lib/tls/i686/cmov/libcrypt-2.7.so
b7c4f000-b7c51000 rw-p 00008000 fe:00 11600185   /lib/tls/i686/cmov/libcrypt-2.7.so
b7c51000-b7c78000 rw-p b7c51000 00:00 0 
b7c78000-b7c83000 r-xp 00000000 fe:00 11602959   /lib/security/pam_unix.so
b7c83000-b7c84000 rw-p 0000b000 fe:00 11602959   /lib/security/pam_unix.so
b7c84000-b7c90000 rw-p b7c84000 00:00 0 
b7c90000-b7c96000 r-xp 00000000 fe:00 11599880   /lib/libusb-0.1.so.4.4.4
b7c96000-b7c98000 rw-p 00005000 fe:00 11599880   /lib/libusb-0.1.so.4.4.4
b7c98000-b7cac000 r-xp 00000000 fe:00 11602926   /lib/tls/i686/cmov/libpthread-2.7.so
b7cac000-b7cae000 rw-p 00013000 fe:00 11602926   /lib/tls/i686/cmov/libpthread-2.7.so
b7cae000-b7cb0000 rw-p b7cae000 00:00 0 
b7cc0000-b7cc9000 r-xp 00000000 fe:00 11602921   /lib/tls/i686/cmov/libnss_files-2.7.so
b7cc9000-b7ccb000 rw-p 00008000 fe:00 11602921   /lib/tls/i686/cmov/libnss_files-2.7.so
b7ccb000-b7cd3000 r-xp 00000000 fe:00 11602923   /lib/tls/i686/cmov/libnss_nis-2.7.so
b7cd3000-b7cd5000 rw-p 00007000 fe:00 11602923   /lib/tls/i686/cmov/libnss_nis-2.7.so
b7cd5000-b7ce9000 r-xp 00000000 fe:00 11600193   /lib/tls/i686/cmov/libnsl-2.7.so
b7ce9000-b7ceb000 rw-p 00013000 fe:00 11600193   /lib/tls/i686/cmov/libnsl-2.7.so
b7ceb000-b7ced000 rw-p b7ceb000 00:00 0 
b7ced000-b7cf4000 r-xp 00000000 fe:00 11602919   /lib/tls/i686/cmov/libnss_compat-2.7.so
b7cf4000-b7cf6000 rw-p 00006000 fe:00 11602919   /lib/tls/i686/cmov/libnss_compat-2.7.so
b7cf9000-b7cfc000 r-xp 00000000 fe:00 11600019   /lib/security/pam_access.so
b7cfc000-b7cfd000 rw-p 00002000 fe:00 11600019   /lib/security/pam_access.so
b7cfd000-b7d00000 r-xp 00000000 fe:00 794866     /usr/lib/libthinkfinger.so.0.0.0
b7d00000-b7d01000 rw-p 00002000 fe:00 794866     /usr/lib/libthinkfinger.so.0.0.0
b7d01000-b7d03000 r-xp 00000000 fe:00 11599876   /lib/security/pam_thinkfinger.so
b7d03000-b7d04000 rw-p 00001000 fe:00 11599876   /lib/security/pam_thinkfinger.so
b7d06000-b7d45000 r--p 00000000 fe:00 1376322    /usr/lib/locale/en_US.utf8/LC_CTYPE
b7d45000-b7d46000 r--p 00000000 fe:00 1377020    /usr/lib/locale/en_US.utf8/LC_NUMERIC
b7d46000-b7e27000 r--p 00000000 fe:00 1376323    /usr/lib/locale/en_US.utf8/LC_COLLATE
b7e27000-b7e28000 rw-p b7e27000 00:00 0 
b7e28000-b7f71000 r-xp 00000000 fe:00 11600176   /lib/tls/i686/cmov/libc-2.7.so
b7f71000-b7f72000 r--p 00149000 fe:00 11600176   /lib/tls/i686/cmov/libc-2.7.so
b7f72000-b7f74000 rw-p 0014a000 fe:00 11600176   /lib/tls/i686/cmov/libc-2.7.so
b7f74000-b7f78000 rw-p b7f74000 00:00 0 
b7f78000-b7f7a000 r-xp 00000000 fe:00 11600187   /lib/tls/i686/cmov/libdl-2.7.so
b7f7a000-b7f7c000 rw-p 00001000 fe:00 11600187   /lib/tls/i686/cmov/libdl-2.7.so
b7f7c000-b7f85000 r-xp 00000000 fe:00 11599893   /lib/libpam.so.0.81.6
b7f85000-b7f86000 rw-p 00008000 fe:00 11599893   /lib/libpam.so.0.81.6
b7f86000-b7f87000 r--p 00000000 fe:00 1376480    /usr/lib/locale/en_US.utf8/LC_TIME
b7f87000-b7f88000 r--p 00000000 fe:00 1376481    /usr/lib/locale/en_US.utf8/LC_MONETARY
b7f88000-b7f89000 r--p 00000000 fe:00 1377024    /usr/lib/locale/en_US.utf8/LC_MESSAGES/SYS_LC_MESSAGES
b7f89000-b7f8a000 r--p 00000000 fe:00 1377042    /usr/lib/locale/en_US.utf8/LC_PAPER
b7f8a000-b7f8b000 r--p 00000000 fe:00 1377058    /usr/lib/locale/en_US.utf8/LC_NAME
b7f8b000-b7f8c000 r--p 00000000 fe:00 1376482    /usr/lib/locale/en_US.utf8/LC_ADDRESS
b7f8c000-b7f8d000 r--p 00000000 fe:00 1376483    /usr/lib/locale/en_US.utf8/LC_TELEPHONE
b7f8d000-b7f8e000 r--p 00000000 fe:00 1376484    /usr/lib/locale/en_US.utf8/LC_MEASUREMENT
b7f8e000-b7f95000 r--s 00000000 fe:00 790377     /usr/lib/gconv/gconv-modules.cache
b7f95000-b7f96000 r--p 00000000 fe:00 1376485    /usr/lib/locale/en_US.utf8/LC_IDENTIFICATION
b7f96000-b7f98000 rw-p b7f96000 00:00 0 
b7f98000-b7f99000 r-xp b7f98000 00:00 0          [vdso]
b7f99000-b7fb3000 r-xp 00000000 fe:00 11602895   /lib/ld-2.7.so
b7fb3000-b7fb5000 rw-p 00019000 fe:00 11602895   /lib/ld-2.7.so
bf995000-bf9aa000 rw-p bffeb000 00:00 0          [stack]
Aborted