Comment 0 for bug 553786

Binary package hint: sudo

Lucid beta1, sudo 1.7.2p1-1ubuntu4. I added a file with incorrect permissions under /etc/sudoers.d/, and while that needed fixing, sudo(8) certainly shouldn't react like this:

$ sudo bash
sudo: /etc/sudoers.d/admin is mode 0644, should be 0440
>>> /etc/sudoers.d/README: /etc/sudoers.d/admin near line 18 <<<
sudo: parse error in /etc/sudoers.d/README near line 18
sudo: no valid sudoers sources found, quitting
*** glibc detected *** sudo: double free or corruption (!prev): 0x0861b7b0 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6(+0x6b581)[0xa3a581]
/lib/tls/i686/cmov/libc.so.6(+0x6cdd8)[0xa3bdd8]
/lib/tls/i686/cmov/libc.so.6(cfree+0x6d)[0xa3eebd]
/lib/tls/i686/cmov/libc.so.6(fclose+0x14a)[0xa2aa9a]
sudo[0x805782d]
sudo[0x80587c6]
sudo[0x805639e]
sudo[0x805a104]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0x9e5bd6]
sudo[0x804a7c1]
======= Memory map: ========
002b1000-002b7000 r-xp 00000000 08:07 16579 /lib/tls/i686/cmov/libnss_compat-2.11.1.so
002b7000-002b8000 r--p 00006000 08:07 16579 /lib/tls/i686/cmov/libnss_compat-2.11.1.so
002b8000-002b9000 rw-p 00007000 08:07 16579 /lib/tls/i686/cmov/libnss_compat-2.11.1.so
003bf000-003c9000 r-xp 00000000 08:07 16581 /lib/tls/i686/cmov/libnss_files-2.11.1.so
003c9000-003ca000 r--p 00009000 08:07 16581 /lib/tls/i686/cmov/libnss_files-2.11.1.so
003ca000-003cb000 rw-p 0000a000 08:07 16581 /lib/tls/i686/cmov/libnss_files-2.11.1.so
0045f000-00467000 r-xp 00000000 08:07 16583 /lib/tls/i686/cmov/libnss_nis-2.11.1.so
00467000-00468000 r--p 00007000 08:07 16583 /lib/tls/i686/cmov/libnss_nis-2.11.1.so
00468000-00469000 rw-p 00008000 08:07 16583 /lib/tls/i686/cmov/libnss_nis-2.11.1.so
00542000-0055f000 r-xp 00000000 08:07 16364 /lib/libgcc_s.so.1
0055f000-00560000 r--p 0001c000 08:07 16364 /lib/libgcc_s.so.1
00560000-00561000 rw-p 0001d000 08:07 16364 /lib/libgcc_s.so.1
0060b000-0060c000 r-xp 00000000 00:00 0 [vdso]
006e6000-006e8000 r-xp 00000000 08:07 16575 /lib/tls/i686/cmov/libdl-2.11.1.so
006e8000-006e9000 r--p 00001000 08:07 16575 /lib/tls/i686/cmov/libdl-2.11.1.so
006e9000-006ea000 rw-p 00002000 08:07 16575 /lib/tls/i686/cmov/libdl-2.11.1.so
0084e000-00869000 r-xp 00000000 08:07 16304 /lib/ld-2.11.1.so
00869000-0086a000 r--p 0001a000 08:07 16304 /lib/ld-2.11.1.so
0086a000-0086b000 rw-p 0001b000 08:07 16304 /lib/ld-2.11.1.so
008a5000-008ae000 r-xp 00000000 08:07 16574 /lib/tls/i686/cmov/libcrypt-2.11.1.so
008ae000-008af000 r--p 00008000 08:07 16574 /lib/tls/i686/cmov/libcrypt-2.11.1.so
008af000-008b0000 rw-p 00009000 08:07 16574 /lib/tls/i686/cmov/libcrypt-2.11.1.so
008b0000-008d7000 rw-p 00000000 00:00 0
009cf000-00b22000 r-xp 00000000 08:07 16572 /lib/tls/i686/cmov/libc-2.11.1.so
00b22000-00b23000 ---p 00153000 08:07 16572 /lib/tls/i686/cmov/libc-2.11.1.so
00b23000-00b25000 r--p 00153000 08:07 16572 /lib/tls/i686/cmov/libc-2.11.1.so
00b25000-00b26000 rw-p 00155000 08:07 16572 /lib/tls/i686/cmov/libc-2.11.1.so
00b26000-00b29000 rw-p 00000000 00:00 0
00c5d000-00c68000 r-xp 00000000 08:07 16381 /lib/libpam.so.0.82.2
00c68000-00c69000 r--p 0000a000 08:07 16381 /lib/libpam.so.0.82.2
00c69000-00c6a000 rw-p 0000b000 08:07 16381 /lib/libpam.so.0.82.2
00e4f000-00e62000 r-xp 00000000 08:07 16578 /lib/tls/i686/cmov/libnsl-2.11.1.so
00e62000-00e63000 r--p 00012000 08:07 16578 /lib/tls/i686/cmov/libnsl-2.11.1.so
00e63000-00e64000 rw-p 00013000 08:07 16578 /lib/tls/i686/cmov/libnsl-2.11.1.so
00e64000-00e66000 rw-p 00000000 00:00 0
08048000-08066000 r-xp 00000000 08:07 573495 /usr/bin/sudo
08066000-08067000 r--p 0001d000 08:07 573495 /usr/bin/sudo
08067000-08068000 rw-p 0001e000 08:07 573495 /usr/bin/sudo
08068000-0806b000 rw-p 00000000 00:00 0
08612000-08633000 rw-p 00000000 00:00 0 [heap]
b7600000-b7621000 rw-p 00000000 00:00 0
b7621000-b7700000 ---p 00000000 00:00 0
b7715000-b7754000 r--p 00000000 08:07 604029 /usr/lib/locale/en_US.utf8/LC_CTYPE
b7754000-b7755000 r--p 00000000 08:07 604030 /usr/lib/locale/en_US.utf8/LC_NUMERIC
b7755000-b7756000 r--p 00000000 08:07 604031 /usr/lib/locale/en_US.utf8/LC_TIME
b7756000-b7757000 r--p 00000000 08:07 604033 /usr/lib/locale/en_US.utf8/LC_MONETARY
b7757000-b7758000 r--p 00000000 08:07 604035 /usr/lib/locale/en_US.utf8/LC_MESSAGES/SYS_LC_MESSAGES
b7758000-b775a000 rw-p 00000000 00:00 0
b775a000-b775b000 r--p 00000000 08:07 604036 /usr/lib/locale/en_US.utf8/LC_PAPER
b775b000-b775c000 r--p 00000000 08:07 604037 /usr/lib/locale/en_US.utf8/LC_NAME
b775c000-b775d000 r--p 00000000 08:07 604038 /usr/lib/locale/en_US.utf8/LC_ADDRESS
b775d000-b775e000 r--p 00000000 08:07 604039 /usr/lib/locale/en_US.utf8/LC_TELEPHONE
b775e000-b775f000 r--p 00000000 08:07 604040 /usr/lib/locale/en_US.utf8/LC_MEASUREMENT
b775f000-b7766000 r--s 00000000 08:07 571542 /usr/lib/gconv/gconv-modules.cache
b7766000-b7767000 r--p 00000000 08:07 604041 /usr/lib/locale/en_US.utf8/LC_IDENTIFICATION
b7767000-b7769000 rw-p 00000000 00:00 0
bfe6a000-bfe7f000 rw-p 00000000 00:00 0 [stack]
Aborted

The above stack-trace spam was trivially and consistently reproducible.