Bug#231045: ssh: fails to start as daemon -- runs fine with -D
Colin Watson wrote:
On Tue, Feb 03, 2004 at 08:57:02PM -0800, David Liontooth wrote:
Package: ssh
Version: 1:3.6.1p2-9
Severity: normal
Tags: sid
The sshd daemon fails to start up on boot, or when issuing
"/etc/init.d/ssh start", or on a simple "sshd". There is no error
message -- in fact the receipt is normal in the case of the init.d
script: "Starting OpenBSD Secure Shell server: sshd" and no newline.
In contrast, starting the ssh service with a simple "sshd -D" works
without problems. I put /usr/sbin/sshd -D >& log & into
/etc/init.d/bootmisc.sh and have normal functionality.
The problem may well be due to another package; I'm unsure how to
troubleshoot. Same results with 1:3.6.1p2-11.
Please install the strace package and run 'strace -f sshd'. (I have a
guess, but we shall see ...)
# strace -f sshd
execve("/usr/sbin/sshd", ["sshd"], [/* 14 vars */]) = 0
uname({sys="Linux", node="paco", ...}) = 0
brk(0) = 0x80903f0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x40017000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.preload", O_RDONLY) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=47141, ...}) = 0
old_mmap(NULL, 47141, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40018000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/libwrap.so.0", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\240!\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=25860, ...}) = 0
old_mmap(NULL, 30724, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40024000
old_mmap(0x4002a000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0x5000) = 0x4002a000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/libpam.so.0", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\10\25\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=28884, ...}) = 0
old_mmap(NULL, 31944, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4002c000
old_mmap(0x40033000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0x6000) = 0x40033000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/libdl.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0P\34\0\000"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=9796, ...}) = 0
old_mmap(NULL, 8632, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40034000
old_mmap(0x40036000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0x2000) = 0x40036000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/libutil.so.1", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0 \16\0\000"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=7732, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x40037000
old_mmap(NULL, 10636, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40038000
old_mmap(0x4003a000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0x1000) = 0x4003a000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/usr/lib/libz.so.1", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\0\27\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=67304, ...}) = 0
old_mmap(NULL, 66268, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4003b000
old_mmap(0x4004b000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0x10000) = 0x4004b000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/libnsl.so.1", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\20<\0\000"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=73452, ...}) = 0
old_mmap(NULL, 84864, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4004c000
old_mmap(0x4005e000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0x11000) = 0x4005e000
old_mmap(0x4005f000, 7040, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4005f000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/usr/lib/i686/cmov/libcrypto.so.0.9.7", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\320\270"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=969092, ...}) = 0
old_mmap(NULL, 986660, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40061000
old_mmap(0x4013d000, 73728, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0xdb000) = 0x4013d000
old_mmap(0x4014f000, 11812, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4014f000
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\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0`^\1\000"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=1243076, ...}) = 0
old_mmap(NULL, 1253316, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40152000
old_mmap(0x40279000, 36864, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0x126000) = 0x40279000
old_mmap(0x40282000, 8132, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x40282000
close(3) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x40284000
munmap(0x40018000, 47141) = 0
brk(0) = 0x80903f0
brk(0x80b13f0) = 0x80b13f0
brk(0) = 0x80b13f0
brk(0x80b2000) = 0x80b2000
getpid() = 15727
getpid() = 15727
open("/dev/urandom", O_RDONLY|O_NONBLOCK|O_NOCTTY) = 3
select(4, [3], NULL, NULL, {0, 10000}) = 1 (in [3], left {0, 10000})
read(3, "\23p\214jB\350.\24\24\274Z`H~\201\334\203I\r\312ze\301"..., 32)
= 32
close(3) = 0
getpid() = 15727
getpid() = 15727
getuid32() = 0
getpid() = 15727
time(NULL) = 1075955469
getpid() = 15727
open("/etc/ssh/sshd_config", O_RDONLY|O_LARGEFILE) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=2076, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x40018000
read(3, "# Package generated configuratio"..., 4096) = 2076
getuid32() = 0
getuid32() = 0
read(3, "", 4096) = 0
close(3) = 0
munmap(0x40018000, 4096) = 0
open("/etc/ssh/ssh_host_rsa_key", O_RDONLY|O_LARGEFILE) = 3
fstat64(3, {st_mode=S_IFREG|0600, st_size=883, ...}) = 0
getuid32() = 0
fstat64(3, {st_mode=S_IFREG|0600, st_size=883, ...}) = 0
read(3, "-----BEGIN RSA PRIVATE KEY-----\n"..., 883) = 883
_llseek(3, 0, [0], SEEK_SET) = 0
fcntl64(3, F_GETFL) = 0x8000 (flags
O_RDONLY|O_LARGEFILE)
fstat64(3, {st_mode=S_IFREG|0600, st_size=883, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x40018000
_llseek(3, 0, [0], SEEK_CUR) = 0
read(3, "-----BEGIN RSA PRIVATE KEY-----\n"..., 4096) = 883
getpid() = 15727
time([1075955469]) = 1075955469
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
getpid() = 15727
close(3) = 0
munmap(0x40018000, 4096) = 0
open("/etc/ssh/ssh_host_dsa_key", O_RDONLY|O_LARGEFILE) = 3
fstat64(3, {st_mode=S_IFREG|0600, st_size=668, ...}) = 0
getuid32() = 0
fstat64(3, {st_mode=S_IFREG|0600, st_size=668, ...}) = 0
read(3, "-----BEGIN DSA PRIVATE KEY-----\n"..., 668) = 668
_llseek(3, 0, [0], SEEK_SET) = 0
fcntl64(3, F_GETFL) = 0x8000 (flags
O_RDONLY|O_LARGEFILE)
fstat64(3, {st_mode=S_IFREG|0600, st_size=668, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x40018000
_llseek(3, 0, [0], SEEK_CUR) = 0
read(3, "-----BEGIN DSA PRIVATE KEY-----\n"..., 4096) = 668
close(3) = 0
munmap(0x40018000, 4096) = 0
socket(PF_UNIX, SOCK_STREAM, 0) = 3
connect(3, {sa_family=AF_UNIX, path="/var/run/.nscd_socket"}, 110) = -1
ENOENT (No such file or directory)
close(3) = 0
open("/etc/nsswitch.conf", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=465, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x40018000
read(3, "# /etc/nsswitch.conf\n#\n# Example"..., 4096) = 465
read(3, "", 4096) = 0
close(3) = 0
munmap(0x40018000, 4096) = 0
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=47141, ...}) = 0
old_mmap(NULL, 47141, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40018000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/libnss_compat.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0000\22\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=27412, ...}) = 0
old_mmap(NULL, 30508, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40285000
old_mmap(0x4028c000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0x6000) = 0x4028c000
close(3) = 0
munmap(0x40018000, 47141) = 0
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=47141, ...}) = 0
old_mmap(NULL, 47141, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40018000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/libnss_nis.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\0\34\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=32304, ...}) = 0
old_mmap(NULL, 35564, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4028d000
old_mmap(0x40295000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0x7000) = 0x40295000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/libnss_files.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0p\35\0\000"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=34436, ...}) = 0
old_mmap(NULL, 33720, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40296000
old_mmap(0x4029e000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
3, 0x8000) = 0x4029e000
close(3) = 0
munmap(0x40018000, 47141) = 0
open("/etc/passwd", O_RDONLY) = 3
fcntl64(3, F_GETFD) = 0
fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
_llseek(3, 0, [0], SEEK_CUR) = 0
fstat64(3, {st_mode=S_IFREG|0644, st_size=1474, ...}) = 0
mmap2(NULL, 1474, PROT_READ, MAP_SHARED, 3, 0) = 0x40018000
_llseek(3, 1474, [1474], SEEK_SET) = 0
munmap(0x40018000, 1474) = 0
close(3) = 0
stat64("/var/run/sshd", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
setgroups32(0, 0) = 0
fork(Process 15728 attached
) = 15728
[pid 15727] exit_group(0) = ?
[pid 15728] --- SIGSTOP (Stopped (signal)) @ 0 (0) ---
setsid() = 15728
chdir("/") = 0
open("/dev/null", O_RDWR) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=7242, ...}) = 0
close(3) = 0
time([1075955469]) = 1075955469
open("/etc/localtime", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=1017, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x40018000
read(3, "TZif\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\4\0\0\0\4\0"...,
4096) = 1017
close(3) = 0
munmap(0x40018000, 4096) = 0
getpid() = 15728
rt_sigaction(SIGPIPE, {0x40225be0, [], SA_RESTORER, 0x4017b498},
{SIG_DFL}, 8) = 0
socket(PF_UNIX, SOCK_DGRAM, 0) = 3
fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
connect(3, {sa_family=AF_UNIX, path="/dev/log"}, 16) = 0
send(3, "<34>Feb 4 20:31:09 sshd[15728]:"..., 64, 0) = 64
rt_sigaction(SIGPIPE, {SIG_DFL}, NULL, 8) = 0
close(3) = 0
exit_group(255) = ?
Process 15728 detached
Cheers,
David
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