"Segmentation fault" al hacer un ls en Sarge
Hola, de repente en un servidor Sarge en producción falla casi todo.
Doy por hecho que el problema tiene mucho que ver con que ni siquiera
se puede hacer un "ls":
~# ls
Segmentation fault
Recuerdo que una vez me pasó lo mismo en otro equipo, aunque sólo a
partir de un directorio, y recuerdo que lo corregí borrando algún
archivo (no lo recuerdo muy bien). Pero claro, ahora la situación es
mucho más grave, y servicios no pueden escribir en /tmp (tal vez
porque intentan leer antes...).
Pego un "strace ls":
/# strace ls
execve("/bin/ls", ["ls"], [/* 18 vars */]) = 0
uname({sys="Linux", node="linux", ...}) = 0
brk(0) = 0x805b000
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=16546, ...}) = 0
old_mmap(NULL, 16546, 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/tls/librt.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\220\32"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=22940, ...}) = 0
old_mmap(NULL, 21588, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4001d000
old_mmap(0x40022000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x5000) = 0x40022000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libacl.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\300\24"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=22336, ...}) = 0
old_mmap(NULL, 25412, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40023000
old_mmap(0x40029000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x5000) = 0x40029000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/tls/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`Z\1\000"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1254660, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x4002a000
old_mmap(NULL, 1264972, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4002b000
old_mmap(0x40155000, 36864, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x129000) = 0x40155000
old_mmap(0x4015e000, 7500, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4015e000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/tls/libpthread.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\0pF\0\000"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=78233, ...}) = 0
old_mmap(NULL, 60772, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40160000
old_mmap(0x4016c000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0xc000) = 0x4016c000
old_mmap(0x4016d000, 7524, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4016d000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libattr.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\340\r\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=10824, ...}) = 0
old_mmap(NULL, 13892, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4016f000
old_mmap(0x40172000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x2000) = 0x40172000
close(3) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x40173000
set_thread_area({entry_number:-1 -> 6, base_addr:0x401732a0,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
munmap(0x40018000, 16546) = 0
set_tid_address(0x401732e8) = 32513
rt_sigaction(SIGRTMIN, {0x401645d0, [], SA_SIGINFO}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
¿Alguna sugerencia? Mil gracias.
--
Iñaki Baz Castillo
<ibc.listas@aliax.net>
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