Re: "Segmentation fault" al hacer un ls en Sarge
El 2/08/07, Iñaki Baz Castillo <ibc.listas@aliax.net> escribió:
> 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>
>
Si no ha habido actualización de por medio, el problema tiene que ser hardware.
Probaría a pasarle un memtest para ver la ram y/o probar con otro disco duro.
A mi me pasó algo similiar con un servidor y tras muchas pruebas, era
un módulo de ram que había cascado.
Suerte
--
"... may the source be with you..."
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