Diagnósticos de falha de segmentação

Question

Diagnósticos de falha de segmentação

#1 resposta do (1 votos)

1

Estou tentando diagnosticar um problema de falha de segmentação que começou a ocorrer após a atualização para o Ubuntu 14.04 (32 bits). Estou executando um cliente TSM 6.2.5-4 que funcionou bem até a atualização. Eu tentei usar strace para chegar ao núcleo do problema, mas não vejo qual é o problema.

O SIGSEGV ocorre logo após uma chamada mmap2, então eu pensei que poderia ser uma falta de espaço de troca de memória em geral, mas há muitos dos dois disponíveis. Pouco antes da chamada mmap, há também um tempo limite de uma chamada selecionada, então talvez tenha algo a ver com isso.

Honestamente, estou um pouco fora da minha profundidade aqui. Eu tentei perguntar à Comunidade Ubuntu e à comunidade TSM, mas nenhuma palavra de qualquer um. Então, eu espero que alguém aqui possa me dizer como ler este strace, o final do qual eu adiciono (o resto pode ser encontrado aqui link ). Eu também estou feliz em fornecer qualquer outra informação que possa ser de ajuda! Muito obrigado antecipadamente!

open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
futex(0xb718be2c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
brk(0x9fa8000)                          = 0x9fa8000
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
brk(0x9fd9000)                          = 0x9fd9000
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
open("/proc/mounts", O_RDONLY|O_LARGEFILE) = 4
fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "rootfs / rootfs rw 0 0\nsysfs /sy"..., 1024) = 1024
read(4, "lv001 /data ext4 rw,relatime,dat"..., 1024) = 46
read(4, "", 1024)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
brk(0x9fc0000)                          = 0x9fc0000
brk(0x9fa8000)                          = 0x9fa8000
brk(0x9f8f000)                          = 0x9f8f000
openat(AT_FDCWD, "/tmp/TSM", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
mmap2(NULL, 512000, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb638b000
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
open("/proc/mounts", O_RDONLY|O_LARGEFILE) = 4
fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "rootfs / rootfs rw 0 0\nsysfs /sy"..., 1024) = 1024
read(4, "lv001 /data ext4 rw,relatime,dat"..., 1024) = 46
read(4, "", 1024)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
statfs64("/", 84, {f_type="EXT2_SUPER_MAGIC", f_bsize=4096, f_blocks=3063340, f_bfree=708785, f_bavail=547416, f_files=786432, f_ffree=540306, f_fsid={-371423568, -29257012}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
statfs64("/proc", 84, {f_type="PROC_SUPER_MAGIC", f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/proc", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
statfs64("/sys", 84, {f_type="SYSFS_MAGIC", f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/sys", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
statfs64("/sys/fs/cgroup", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=1, f_bfree=1, f_bavail=1, f_files=202220, f_ffree=202218, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/fs/cgroup", {st_mode=S_IFDIR|0755, st_size=60, ...}) = 0
statfs64("/sys/fs/fuse/connections", 84, {f_type=0x65735543, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/fs/fuse/connections", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
statfs64("/sys/kernel/debug", 84, {f_type=0x64626720, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/kernel/debug", {st_mode=S_IFDIR|0700, st_size=0, ...}) = 0
statfs64("/sys/kernel/security", 84, {f_type=0x73636673, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/kernel/security", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
statfs64("/dev", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=1033006, f_bfree=1033003, f_bavail=1033003, f_files=197227, f_ffree=196785, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/dev", {st_mode=S_IFDIR|0755, st_size=4240, ...}) = 0
open("/etc/fstab", O_RDONLY|O_CLOEXEC)  = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=989, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "# /etc/fstab: static file system"..., 4096) = 989
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
statfs64("/run", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=207101, f_bfree=206972, f_bavail=206972, f_files=202220, f_ffree=201823, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4138}) = 0
stat64("/run", {st_mode=S_IFDIR|0755, st_size=660, ...}) = 0
statfs64("/run/lock", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=1280, f_bfree=1280, f_bavail=1280, f_files=202220, f_ffree=202214, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/run/lock", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=120, ...}) = 0
statfs64("/run/shm", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=1035503, f_bfree=1035503, f_bavail=1035503, f_files=202220, f_ffree=202219, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4134}) = 0
stat64("/run/shm", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=40, ...}) = 0
statfs64("/run/user", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=25600, f_bfree=25600, f_bavail=25600, f_files=202220, f_ffree=202217, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/run/user", {st_mode=S_IFDIR|0755, st_size=80, ...}) = 0
statfs64("/sys/fs/pstore", 84, {f_type=0x6165676c, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/fs/pstore", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
statfs64("/sys/fs/cgroup/systemd", 84, {f_type=0x27e0eb, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/sys/fs/cgroup/systemd", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
statfs64("/data", 84, {f_type="EXT2_SUPER_MAGIC", f_bsize=4096, f_blocks=128981614, f_bfree=93342103, f_bavail=86784459, f_files=32768000, f_ffree=32451931, f_fsid={-1906668704, -244025993}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/data", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
munmap(0xb638b000, 512000)              = 0
statfs64("/", 84, {f_type="EXT2_SUPER_MAGIC", f_bsize=4096, f_blocks=3063340, f_bfree=708785, f_bavail=547416, f_files=786432, f_ffree=540306, f_fsid={-371423568, -29257012}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
mmap2(NULL, 8392704, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0xb5c07000
mprotect(0xb5c07000, 4096, PROT_NONE)   = 0
clone(child_stack=0xb6407424, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0xb6407ba8, {entry_number:6, base_addr:0xb6407b40, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}, child_tidptr=0xb6407ba8) = 13914
select(0, NULL, NULL, NULL, {0, 50000}) = 0 (Timeout)
sched_yield()                           = 0
mmap2(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb5a06000
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x2} ---
time(NULL)                              = 1425498940
open("/etc/localtime", O_RDONLY|O_CLOEXEC) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=2309, ...}) = 0
fstat64(4, {st_mode=S_IFREG|0644, st_size=2309, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "TZif2open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
futex(0xb718be2c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
brk(0x9fa8000)                          = 0x9fa8000
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
brk(0x9fd9000)                          = 0x9fd9000
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
open("/proc/mounts", O_RDONLY|O_LARGEFILE) = 4
fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "rootfs / rootfs rw 0 0\nsysfs /sy"..., 1024) = 1024
read(4, "lv001 /data ext4 rw,relatime,dat"..., 1024) = 46
read(4, "", 1024)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
brk(0x9fc0000)                          = 0x9fc0000
brk(0x9fa8000)                          = 0x9fa8000
brk(0x9f8f000)                          = 0x9f8f000
openat(AT_FDCWD, "/tmp/TSM", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
mmap2(NULL, 512000, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb638b000
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
open("/proc/mounts", O_RDONLY|O_LARGEFILE) = 4
fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "rootfs / rootfs rw 0 0\nsysfs /sy"..., 1024) = 1024
read(4, "lv001 /data ext4 rw,relatime,dat"..., 1024) = 46
read(4, "", 1024)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
statfs64("/", 84, {f_type="EXT2_SUPER_MAGIC", f_bsize=4096, f_blocks=3063340, f_bfree=708785, f_bavail=547416, f_files=786432, f_ffree=540306, f_fsid={-371423568, -29257012}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
statfs64("/proc", 84, {f_type="PROC_SUPER_MAGIC", f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/proc", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
statfs64("/sys", 84, {f_type="SYSFS_MAGIC", f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/sys", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
statfs64("/sys/fs/cgroup", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=1, f_bfree=1, f_bavail=1, f_files=202220, f_ffree=202218, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/fs/cgroup", {st_mode=S_IFDIR|0755, st_size=60, ...}) = 0
statfs64("/sys/fs/fuse/connections", 84, {f_type=0x65735543, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/fs/fuse/connections", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
statfs64("/sys/kernel/debug", 84, {f_type=0x64626720, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/kernel/debug", {st_mode=S_IFDIR|0700, st_size=0, ...}) = 0
statfs64("/sys/kernel/security", 84, {f_type=0x73636673, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/kernel/security", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
statfs64("/dev", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=1033006, f_bfree=1033003, f_bavail=1033003, f_files=197227, f_ffree=196785, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/dev", {st_mode=S_IFDIR|0755, st_size=4240, ...}) = 0
open("/etc/fstab", O_RDONLY|O_CLOEXEC)  = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=989, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "# /etc/fstab: static file system"..., 4096) = 989
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
read(4, "", 4096)                       = 0
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
statfs64("/run", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=207101, f_bfree=206972, f_bavail=206972, f_files=202220, f_ffree=201823, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4138}) = 0
stat64("/run", {st_mode=S_IFDIR|0755, st_size=660, ...}) = 0
statfs64("/run/lock", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=1280, f_bfree=1280, f_bavail=1280, f_files=202220, f_ffree=202214, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/run/lock", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=120, ...}) = 0
statfs64("/run/shm", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=1035503, f_bfree=1035503, f_bavail=1035503, f_files=202220, f_ffree=202219, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4134}) = 0
stat64("/run/shm", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=40, ...}) = 0
statfs64("/run/user", 84, {f_type=0x1021994, f_bsize=4096, f_blocks=25600, f_bfree=25600, f_bavail=25600, f_files=202220, f_ffree=202217, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/run/user", {st_mode=S_IFDIR|0755, st_size=80, ...}) = 0
statfs64("/sys/fs/pstore", 84, {f_type=0x6165676c, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/sys/fs/pstore", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
statfs64("/sys/fs/cgroup/systemd", 84, {f_type=0x27e0eb, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=4142}) = 0
stat64("/sys/fs/cgroup/systemd", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
statfs64("/data", 84, {f_type="EXT2_SUPER_MAGIC", f_bsize=4096, f_blocks=128981614, f_bfree=93342103, f_bavail=86784459, f_files=32768000, f_ffree=32451931, f_fsid={-1906668704, -244025993}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/data", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
munmap(0xb638b000, 512000)              = 0
statfs64("/", 84, {f_type="EXT2_SUPER_MAGIC", f_bsize=4096, f_blocks=3063340, f_bfree=708785, f_bavail=547416, f_files=786432, f_ffree=540306, f_fsid={-371423568, -29257012}, f_namelen=255, f_frsize=4096, f_flags=4128}) = 0
stat64("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/etc/mtab", O_RDONLY|O_CLOEXEC)   = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=780, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "/dev/sda1 / ext4 rw,errors=remou"..., 4096) = 780
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
mmap2(NULL, 8392704, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0xb5c07000
mprotect(0xb5c07000, 4096, PROT_NONE)   = 0
clone(child_stack=0xb6407424, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0xb6407ba8, {entry_number:6, base_addr:0xb6407b40, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}, child_tidptr=0xb6407ba8) = 13914
select(0, NULL, NULL, NULL, {0, 50000}) = 0 (Timeout)
sched_yield()                           = 0
mmap2(NULL, 2101248, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb5a06000
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x2} ---
time(NULL)                              = 1425498940
open("/etc/localtime", O_RDONLY|O_CLOEXEC) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=2309, ...}) = 0
fstat64(4, {st_mode=S_IFREG|0644, st_size=2309, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6a50000
read(4, "TZif2%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%"..., 4096) = 2309
_llseek(4, -28, [2281], SEEK_CUR)       = 0
read(4, "\nCET-1CEST,M3.5.0,M10.5.0/3\n", 4096) = 28
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
write(3, "03/04/2015 20:55:40 ANS0361I DIA"..., 71) = 71
rt_sigaction(SIGABRT, {SIG_DFL, [], SA_RESTORER|SA_STACK|SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_RESETHAND|SA_SIGINFO|SA_NOCLDSTOP|SA_NOCLDWAIT|0x3fffff8, 0xb770c100}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
tgkill(13911, 13911, SIGABRT)           = 0
--- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=13911, si_uid=0} ---
+++ killed by SIGABRT (core dumped) +++
Aborted (core dumped)
%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%%pre%"..., 4096) = 2309
_llseek(4, -28, [2281], SEEK_CUR)       = 0
read(4, "\nCET-1CEST,M3.5.0,M10.5.0/3\n", 4096) = 28
close(4)                                = 0
munmap(0xb6a50000, 4096)                = 0
write(3, "03/04/2015 20:55:40 ANS0361I DIA"..., 71) = 71
rt_sigaction(SIGABRT, {SIG_DFL, [], SA_RESTORER|SA_STACK|SA_RESTART|SA_INTERRUPT|SA_NODEFER|SA_RESETHAND|SA_SIGINFO|SA_NOCLDSTOP|SA_NOCLDWAIT|0x3fffff8, 0xb770c100}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
tgkill(13911, 13911, SIGABRT)           = 0
--- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=13911, si_uid=0} ---
+++ killed by SIGABRT (core dumped) +++
Aborted (core dumped)

segmentation-fault linux ubuntu ubuntu-14.04 tsm

por Philipp 05.03.2015 / 11:47

1 resposta

Tags segmentation-fault linux ubuntu ubuntu-14.04 tsm

fedora packages para enterprise linux Win 2008_R2 problemas no spooler de impressão e congelamento do cliente

score 1 · Answer 1

Uma opção pode ser que, após a chamada mmap2 , o aplicativo tenha acessado um endereço antes não mapeado por uma chamada munmap . Isso também lançaria um SIGSEGV . Mas você precisará de mais de strace para ver isso, algum depurador de memória pode ajudá-lo em tempo de execução como valgrind .

De man 2 munmap :

int munmap(void *addr, size_t length); 
[...]

The address addr must be a multiple of the page size. All pages containing a part of the indicated range are unmapped, and subsequent references to these pages will generate SIGSEGV. It is not an error if the indicated range does not contain any mapped pages.