--- Begin Message ---
Package: procps
Version: 1:3.2.8-8
Severity: normal
I was reading the blog post about systemd and tried the ps command
listed there. It gave me a SIGSEGV as can be seen below. The minimum
command-line needed to reproduce the crash seems to be 'ps f -o cgroup'.
p...@chianamo:~$ ps xaf -eo pid,user,args,cgroup
Signal 11 (SEGV) caught by ps (procps version 3.2.8).
Please send bug reports to <[email protected]> or <[email protected]>
p...@chianamo:~$ gdb --args ps xaf -eo pid,user,args,cgroup
GNU gdb (GDB) 7.0.1-debian
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /bin/ps...done.
(gdb) r
Starting program: /bin/ps xaf -eo pid,user,args,cgroup
Program received signal SIGSEGV, Segmentation fault.
0x00000000deadbeaf in ?? ()
(gdb) bt full
#0 0x00000000deadbeaf in ?? ()
No symbol table info available.
#1 0x00007ffff7bc5bf2 in readproctab2 (want_proc=0x4020aa
<want_this_proc_pcpu>, want_task=0xdeadbeaf, PT=0x639130) at
proc/readproc.c:1080
t = 0x6414e0
tmp = 0x641210
ptab = 0x646680
n_proc_alloc = 30
n_proc = 1
ttab = 0x648d30
n_task_alloc = 1
n_task = 0
data = 0x641210
n_alloc = 30
n_used = 1
pd = 0x4020aa
#2 0x0000000000402df3 in fancy_spew () at ps/display.c:555
pd = 0x0
ptp = 0x639130
n = 0
i = 4096
#3 0x0000000000403084 in main (argc=4, argv=0x7fffffffdf98) at ps/display.c:619
No locals.
(gdb) quit
A debugging session is active.
Inferior 1 [process 4039] will be killed.
Quit anyway? (y or n) y
p...@chianamo:~$ strace -f ps xaf -eo pid,user,args,cgroup
execve("/bin/ps", ["ps", "xaf", "-eo", "pid,user,args,cgroup"], [/* 67 vars
*/]) = 0
brk(0) = 0x1e62000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f79b738f000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f79b738d000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=127425, ...}) = 0
mmap(NULL, 127425, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f79b736d000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libproc-3.2.8.so", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320A\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=160864, ...}) = 0
mmap(NULL, 2247992, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f79b6f4f000
mprotect(0x7f79b6f60000, 2097152, PROT_NONE) = 0
mmap(0x7f79b7160000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x11000) = 0x7f79b7160000
mmap(0x7f79b7161000, 77112, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f79b7161000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libc.so.6", O_RDONLY) = 3
read(3,
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\353\1\0\0\0\0\0"..., 832) =
832
fstat(3, {st_mode=S_IFREG|0755, st_size=1379752, ...}) = 0
mmap(NULL, 3487784, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7f79b6bfb000
mprotect(0x7f79b6d45000, 2097152, PROT_NONE) = 0
mmap(0x7f79b6f45000, 20480, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14a000) = 0x7f79b6f45000
mmap(0x7f79b6f4a000, 18472, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f79b6f4a000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f79b736c000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f79b736b000
arch_prctl(ARCH_SET_FS, 0x7f79b736b6f0) = 0
mprotect(0x7f79b6f45000, 16384, PROT_READ) = 0
mprotect(0x7f79b7390000, 4096, PROT_READ) = 0
munmap(0x7f79b736d000, 127425) = 0
brk(0) = 0x1e62000
brk(0x1e83000) = 0x1e83000
open("/proc/version", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f79b738c000
read(3, "Linux version 2.6.32-3-amd64 (De"..., 1024) = 139
close(3) = 0
munmap(0x7f79b738c000, 4096) = 0
open("/proc/stat", O_RDONLY|O_CLOEXEC) = 3
read(3, "cpu 202954 757 82877 1729810 13"..., 8192) = 1201
close(3) = 0
open("/usr/lib/locale/locale-archive", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=4743680, ...}) = 0
mmap(NULL, 4743680, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f79b6774000
close(3) = 0
rt_sigaction(SIGSYS, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGPWR, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGIO, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGVTALRM, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGXFSZ, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGXCPU, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGURG, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGTTIN, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGCONT, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGCHLD, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGSTKFLT, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGTERM, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGALRM, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGPIPE, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGUSR2, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGSEGV, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGUSR1, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGFPE, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGBUS, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGABRT, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGTRAP, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGILL, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
rt_sigaction(SIGHUP, {0x401c64, ~[RTMIN RT_1], SA_RESTORER, 0x7f79b6c2cfc0},
NULL, 8) = 0
open("/proc/self/stat", O_RDONLY) = 3
read(3, "4064 (ps) R 4063 4063 3149 34820"..., 1023) = 217
close(3) = 0
ioctl(1, TIOCGWINSZ, {ws_row=45, ws_col=180, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
geteuid() = 1000
open("/proc/uptime", O_RDONLY) = 3
lseek(3, 0, SEEK_SET) = 0
read(3, "10532.50 17298.10\n", 2047) = 18
open("/proc/sys/kernel/pid_max", O_RDONLY) = 4
read(4, "32768\n", 24) = 6
close(4) = 0
mmap(NULL, 139264, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f79b7349000
mprotect(0x7f79b736a000, 4096, PROT_NONE) = 0
open("/proc/meminfo", O_RDONLY) = 4
lseek(4, 0, SEEK_SET) = 0
read(4, "MemTotal: 1533996 kB\nMemF"..., 2047) = 1142
stat("/proc/self/task", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
open("/proc", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 5
fcntl(5, F_GETFD) = 0x1 (flags FD_CLOEXEC)
getdents(5, /* 247 entries */, 32768) = 6320
stat("/proc/1", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
open("/proc/1/stat", O_RDONLY) = 6
read(6, "1 (init) S 0 1 1 0 -1 4202752 18"..., 1023) = 202
close(6) = 0
open("/proc/1/status", O_RDONLY) = 6
read(6, "Name:\tinit\nState:\tS (sleeping)\nT"..., 1023) = 727
close(6) = 0
socket(PF_FILE, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 6
connect(6, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = -1 ENOENT
(No such file or directory)
close(6) = 0
socket(PF_FILE, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 6
connect(6, {sa_family=AF_FILE, path="/var/run/nscd/socket"}, 110) = -1 ENOENT
(No such file or directory)
close(6) = 0
open("/etc/nsswitch.conf", O_RDONLY) = 6
fstat(6, {st_mode=S_IFREG|0644, st_size=513, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7f79b738c000
read(6, "# /etc/nsswitch.conf\n#\n# Example"..., 4096) = 513
read(6, "", 4096) = 0
close(6) = 0
munmap(0x7f79b738c000, 4096) = 0
open("/etc/ld.so.cache", O_RDONLY) = 6
fstat(6, {st_mode=S_IFREG|0644, st_size=127425, ...}) = 0
mmap(NULL, 127425, PROT_READ, MAP_PRIVATE, 6, 0) = 0x7f79b736d000
close(6) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libnss_compat.so.2", O_RDONLY) = 6
read(6, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\23\0\0\0\0\0\0"...,
832) = 832
fstat(6, {st_mode=S_IFREG|0644, st_size=31616, ...}) = 0
mmap(NULL, 2127088, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 6, 0) =
0x7f79b656c000
mprotect(0x7f79b6573000, 2093056, PROT_NONE) = 0
mmap(0x7f79b6772000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 6, 0x6000) = 0x7f79b6772000
close(6) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libnsl.so.1", O_RDONLY) = 6
read(6, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\...@\0\0\0\0\0\0"...,
832) = 832
fstat(6, {st_mode=S_IFREG|0644, st_size=89064, ...}) = 0
mmap(NULL, 2194128, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 6, 0) =
0x7f79b6354000
mprotect(0x7f79b6369000, 2093056, PROT_NONE) = 0
mmap(0x7f79b6568000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 6, 0x14000) = 0x7f79b6568000
mmap(0x7f79b656a000, 6864, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f79b656a000
close(6) = 0
mprotect(0x7f79b6568000, 4096, PROT_READ) = 0
mprotect(0x7f79b6772000, 4096, PROT_READ) = 0
munmap(0x7f79b736d000, 127425) = 0
open("/etc/ld.so.cache", O_RDONLY) = 6
fstat(6, {st_mode=S_IFREG|0644, st_size=127425, ...}) = 0
mmap(NULL, 127425, PROT_READ, MAP_PRIVATE, 6, 0) = 0x7f79b736d000
close(6) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libnss_nis.so.2", O_RDONLY) = 6
read(6, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0 \0\0\0\0\0\0"..., 832)
= 832
fstat(6, {st_mode=S_IFREG|0644, st_size=43552, ...}) = 0
mmap(NULL, 2139320, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 6, 0) =
0x7f79b6149000
mprotect(0x7f79b6153000, 2093056, PROT_NONE) = 0
mmap(0x7f79b6352000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 6, 0x9000) = 0x7f79b6352000
close(6) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libnss_files.so.2", O_RDONLY) = 6
read(6, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0p!\0\0\0\0\0\0"..., 832)
= 832
fstat(6, {st_mode=S_IFREG|0644, st_size=47616, ...}) = 0
mmap(NULL, 2143624, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 6, 0) =
0x7f79b5f3d000
mprotect(0x7f79b5f48000, 2093056, PROT_NONE) = 0
mmap(0x7f79b6147000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 6, 0xa000) = 0x7f79b6147000
close(6) = 0
mprotect(0x7f79b6147000, 4096, PROT_READ) = 0
mprotect(0x7f79b6352000, 4096, PROT_READ) = 0
munmap(0x7f79b736d000, 127425) = 0
open("/etc/passwd", O_RDONLY|O_CLOEXEC) = 6
fcntl(6, F_GETFD) = 0x1 (flags FD_CLOEXEC)
lseek(6, 0, SEEK_CUR) = 0
fstat(6, {st_mode=S_IFREG|0644, st_size=2419, ...}) = 0
mmap(NULL, 2419, PROT_READ, MAP_SHARED, 6, 0) = 0x7f79b738c000
lseek(6, 2419, SEEK_SET) = 2419
munmap(0x7f79b738c000, 2419) = 0
close(6) = 0
open("/proc/1/cmdline", O_RDONLY) = 6
read(6, "init [2]\0\0\0", 2047) = 11
close(6) = 0
open("/proc/1/cgroup", O_RDONLY) = 6
read(6, "", 2047) = 0
close(6) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
write(2, "\n\nSignal 11 (SEGV) caught by ps "..., 132
Signal 11 (SEGV) caught by ps (procps version 3.2.8).
Please send bug reports to <[email protected]> or <[email protected]>
) = 132
exit_group(139) = ?
p...@chianamo:~$ cat /proc/1/cgroup
p...@chianamo:~$ cat /proc/1/status
Name: init
State: S (sleeping)
Tgid: 1
Pid: 1
PPid: 0
TracerPid: 0
Uid: 0 0 0 0
Gid: 0 0 0 0
FDSize: 64
Groups:
VmPeak: 10336 kB
VmSize: 10332 kB
VmLck: 0 kB
VmHWM: 784 kB
VmRSS: 752 kB
VmData: 184 kB
VmStk: 84 kB
VmExe: 36 kB
VmLib: 1792 kB
VmPTE: 44 kB
Threads: 1
SigQ: 1/11894
SigPnd: 0000000000000000
ShdPnd: 0000000000000000
SigBlk: 0000000000000000
SigIgn: fffffffe57f0d8fc
SigCgt: 00000000280b2603
CapInh: 0000000000000000
CapPrm: ffffffffffffffff
CapEff: fffffffffffffeff
CapBnd: ffffffffffffffff
Cpus_allowed: 3
Cpus_allowed_list: 0-1
Mems_allowed: 00000000,00000001
Mems_allowed_list: 0
voluntary_ctxt_switches: 2407
nonvoluntary_ctxt_switches: 98
Stack usage: 8 kB
p...@chianamo:~$ cat /proc/1/cmdline
init [2]p...@chianamo:~$
-- System Information:
Debian Release: squeeze/sid
APT prefers testing
APT policy: (700, 'testing'), (600, 'unstable'), (550, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.32-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages procps depends on:
ii initscripts 2.87dsf-10 scripts for initializing and shutt
ii libc6 2.10.2-6 Embedded GNU C Library: Shared lib
ii libncurses5 5.7+20100313-2 shared libraries for terminal hand
ii libncursesw5 5.7+20100313-2 shared libraries for terminal hand
ii lsb-base 3.2-23.1 Linux Standard Base 3.2 init scrip
Versions of packages procps recommends:
ii psmisc 22.11-1 utilities that use the proc file s
--
bye,
pabs
http://wiki.debian.org/PaulWise
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--- End Message ---
