[Bug 553786] Re: *** glibc detected *** sudo: double free or corruption
Jason R. Coombs
jaraco at jaraco.com
Fri Mar 23 21:29:54 UTC 2012
I've just been bitten by this bug yet again. I've had to request to my
administrator to reboot our server into recovery mode to remove the
file. Why isn't a bug that locks administrators out of the operating
system (in an otherwise well-configured environment) not considered a
critical bug? The only workaround I can think of is to know in advance
that creating a file in /etc/sudoers.d might cause lockouts, so keep a
separate shell as root... but I don't always remember to do that.
I would be grateful if someone would please fix this.
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https://bugs.launchpad.net/bugs/553786
Title:
*** glibc detected *** sudo: double free or corruption
Status in “sudo” package in Ubuntu:
Confirmed
Bug description:
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.
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