我正在尝试附加到进程
sshdfprintf它在一台计算机上运行良好，但在其他计算机上运行
SIGSEGV请问谁能告诉一下这可能是什么原因吗
SIGSEGV在计算机 1 上测试 - 一切正常：
Reading symbols from /usr/sbin/sshd...
(No debugging symbols found in /usr/sbin/sshd)
Reading symbols from /lib/x86_64-linux-gnu/libwrap.so.0...
(No debugging symbols found in /lib/x86_64-linux-gnu/libwrap.so.0)
Reading symbols from /lib/x86_64-linux-gnu/libaudit.so.1...
(No debugging symbols found in /lib/x86_64-linux-gnu/libaudit.so.1)
Reading symbols from /lib/x86_64-linux-gnu/libpam.so.0...
(No debugging symbols found in /lib/x86_64-linux-gnu/libpam.so.0)
Reading symbols from /lib/x86_64-linux-gnu/libsystemd.so.0...
(No debugging symbols found in /lib/x86_64-linux-gnu/libsystemd.so.0)
Reading symbols from /lib/x86_64-linux-gnu/libcrypto.so.3...
(No debugging symbols found in /lib/x86_64-linux-gnu/libcrypto.so.3)
Reading symbols from /lib/x86_64-linux-gnu/libz.so.1...
(No debugging symbols found in /lib/x86_64-linux-gnu/libz.so.1)
Reading symbols from /lib/x86_64-linux-gnu/libcrypt.so.1...
(No debugging symbols found in /lib/x86_64-linux-gnu/libcrypt.so.1)
Reading symbols from /lib/x86_64-linux-gnu/libselinux.so.1...
(No debugging symbols found in /lib/x86_64-linux-gnu/libselinux.so.1)
Reading symbols from /lib/x86_64-linux-gnu/libgssapi_krb5.so.2...
(No debugging symbols found in /lib/x86_64-linux-gnu/libgssapi_krb5.so.2)
Reading symbols from /lib/x86_64-linux-gnu/libkrb5.so.3...
(No debugging symbols found in /lib/x86_64-linux-gnu/libkrb5.so.3)
Reading symbols from /lib/x86_64-linux-gnu/libcom_err.so.2...
(No debugging symbols found in /lib/x86_64-linux-gnu/libcom_err.so.2)
Reading symbols from /lib/x86_64-linux-gnu/libc.so.6...
Reading symbols from /usr/lib/debug/.build-id/96/2015aa9d133c6cbcfb31ec300596d7f44d3348.debug...
Reading symbols from /lib/x86_64-linux-gnu/libnsl.so.2...
(No debugging symbols found in /lib/x86_64-linux-gnu/libnsl.so.2)
Reading symbols from /lib/x86_64-linux-gnu/libcap-ng.so.0...
(No debugging symbols found in /lib/x86_64-linux-gnu/libcap-ng.so.0)
Reading symbols from /lib/x86_64-linux-gnu/liblzma.so.5...
(No debugging symbols found in /lib/x86_64-linux-gnu/liblzma.so.5)
Reading symbols from /lib/x86_64-linux-gnu/libzstd.so.1...
(No debugging symbols found in /lib/x86_64-linux-gnu/libzstd.so.1)
Reading symbols from /lib/x86_64-linux-gnu/liblz4.so.1...
(No debugging symbols found in /lib/x86_64-linux-gnu/liblz4.so.1)
Reading symbols from /lib/x86_64-linux-gnu/libcap.so.2...
(No debugging symbols found in /lib/x86_64-linux-gnu/libcap.so.2)
Reading symbols from /lib/x86_64-linux-gnu/libgcrypt.so.20...
(No debugging symbols found in /lib/x86_64-linux-gnu/libgcrypt.so.20)
Reading symbols from /lib64/ld-linux-x86-64.so.2...
Reading symbols from /usr/lib/debug/.build-id/24/6ac0d8deba5a40c63e9a1a87d4d779d8eb589f.debug...
Reading symbols from /lib/x86_64-linux-gnu/libpcre2-8.so.0...
(No debugging symbols found in /lib/x86_64-linux-gnu/libpcre2-8.so.0)
Reading symbols from /lib/x86_64-linux-gnu/libk5crypto.so.3...
(No debugging symbols found in /lib/x86_64-linux-gnu/libk5crypto.so.3)
Reading symbols from /lib/x86_64-linux-gnu/libkrb5support.so.0...
(No debugging symbols found in /lib/x86_64-linux-gnu/libkrb5support.so.0)
Reading symbols from /lib/x86_64-linux-gnu/libkeyutils.so.1...
(No debugging symbols found in /lib/x86_64-linux-gnu/libkeyutils.so.1)
Reading symbols from /lib/x86_64-linux-gnu/libresolv.so.2...
Reading symbols from /usr/lib/debug/.build-id/01/c8e0c8389941a2ff675b7e41799362d24cd30b.debug...
Reading symbols from /lib/x86_64-linux-gnu/libtirpc.so.3...
(No debugging symbols found in /lib/x86_64-linux-gnu/libtirpc.so.3)
Reading symbols from /lib/x86_64-linux-gnu/libgpg-error.so.0...
(No debugging symbols found in /lib/x86_64-linux-gnu/libgpg-error.so.0)
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x000074157c3274f7 in __libc_connect (fd=5, addr=addr@entry=..., len=len@entry=110) at ../sysdeps/unix/sysv/linux/connect.c:26
26 ../sysdeps/unix/sysv/linux/connect.c: No such file or directory.
(gdb) call fprintf(stderr, "aaah\n")
$1 = 5
sshd版本：
root@zauek:~# file /usr/sbin/sshd
/usr/sbin/sshd: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=957213c191d0ab833656c6390749a1270d54d018, for GNU/Linux 3.2.0, stripped
gdb版本：
gbajson@zauek:~ (main)$ gdb -v
GNU gdb (Ubuntu 12.1-0ubuntu1~22.04) 12.1
Copyright (C) 2022 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.
在计算机 2 上测试 -
SIGSEGVAttaching to process 1
Reading symbols from /usr/sbin/sshd...
(No debugging symbols found in /usr/sbin/sshd)
Reading symbols from /usr/lib/x86_64-linux-gnu/libwrap.so.0...
(No debugging symbols found in /usr/lib/x86_64-linux-gnu/libwrap.so.0)
Reading symbols from /lib/x86_64-linux-gnu/libaudit.so.1...
(No debugging symbols found in /lib/x86_64-linux-gnu/libaudit.so.1)
Reading symbols from /lib/x86_64-linux-gnu/libpam.so.0...
(No debugging symbols found in /lib/x86_64-linux-gnu/libpam.so.0)
Reading symbols from /usr/lib/x86_64-linux-gnu/libsystemd.so.0...
(No debugging symbols found in /usr/lib/x86_64-linux-gnu/libsystemd.so.0)
Reading symbols from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1...
(No debugging symbols found in /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1)
Reading symbols from /lib/x86_64-linux-gnu/libutil.so.1...
Reading symbols from /usr/lib/debug/.build-id/16/1124b8378f9e197f17726e406f5437fd5a33dd.debug...
Reading symbols from /lib/x86_64-linux-gnu/libz.so.1...
(No debugging symbols found in /lib/x86_64-linux-gnu/libz.so.1)
Reading symbols from /lib/x86_64-linux-gnu/libcrypt.so.1...
(No debugging symbols found in /lib/x86_64-linux-gnu/libcrypt.so.1)
Reading symbols from /lib/x86_64-linux-gnu/libselinux.so.1...
--Type <RET> for more, q to quit, c to continue without paging--
(No debugging symbols found in /lib/x86_64-linux-gnu/libselinux.so.1)
Reading symbols from /usr/lib/x86_64-linux-gnu/libgssapi_krb5.so.2...
(No debugging symbols found in /usr/lib/x86_64-linux-gnu/libgssapi_krb5.so.2)
Reading symbols from /usr/lib/x86_64-linux-gnu/libkrb5.so.3...
(No debugging symbols found in /usr/lib/x86_64-linux-gnu/libkrb5.so.3)
Reading symbols from /lib/x86_64-linux-gnu/libcom_err.so.2...
(No debugging symbols found in /lib/x86_64-linux-gnu/libcom_err.so.2)
Reading symbols from /lib/x86_64-linux-gnu/libc.so.6...
Reading symbols from /usr/lib/debug/.build-id/09/0256e8388c10b0a5a367e269cc0ed39d15d20b.debug...
Reading symbols from /usr/lib/x86_64-linux-gnu/libnsl.so.2...
(No debugging symbols found in /usr/lib/x86_64-linux-gnu/libnsl.so.2)
Reading symbols from /lib/x86_64-linux-gnu/libcap-ng.so.0...
(No debugging symbols found in /lib/x86_64-linux-gnu/libcap-ng.so.0)
Reading symbols from /lib/x86_64-linux-gnu/libpthread.so.0...
Reading symbols from /usr/lib/debug/.build-id/25/5e355c207aba91a59ae1f808e3b4da443abf0c.debug...
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Reading symbols from /lib/x86_64-linux-gnu/libdl.so.2...
Reading symbols from /usr/lib/debug/.build-id/46/b3bf3f9b9eb092a5c0cf5575e89092f768054c.debug...
Reading symbols from /lib/x86_64-linux-gnu/librt.so.1...
Reading symbols from /usr/lib/debug/.build-id/02/fef90b340c553239e4bf4b2213cc4cb49787eb.debug...
Reading symbols from /lib/x86_64-linux-gnu/liblzma.so.5...
(No debugging symbols found in /lib/x86_64-linux-gnu/liblzma.so.5)
Reading symbols from /usr/lib/x86_64-linux-gnu/libzstd.so.1...
(No debugging symbols found in /usr/lib/x86_64-linux-gnu/libzstd.so.1)
Reading symbols from /usr/lib/x86_64-linux-gnu/liblz4.so.1...
(No debugging symbols found in /usr/lib/x86_64-linux-gnu/liblz4.so.1)
Reading symbols from /usr/lib/x86_64-linux-gnu/libgcrypt.so.20...
(No debugging symbols found in /usr/lib/x86_64-linux-gnu/libgcrypt.so.20)
Reading symbols from /lib64/ld-linux-x86-64.so.2...
Reading symbols from /usr/lib/debug/.build-id/1b/3277a419c3fa42b199e5a170ea215b32689793.debug...
Reading symbols from /usr/lib/x86_64-linux-gnu/libpcre2-8.so.0...
(No debugging symbols found in /usr/lib/x86_64-linux-gnu/libpcre2-8.so.0)
Reading symbols from /usr/lib/x86_64-linux-gnu/libk5crypto.so.3...
(No debugging symbols found in /usr/lib/x86_64-linux-gnu/libk5crypto.so.3)
--Type <RET> for more, q to quit, c to continue without paging--
Reading symbols from /usr/lib/x86_64-linux-gnu/libkrb5support.so.0...
(No debugging symbols found in /usr/lib/x86_64-linux-gnu/libkrb5support.so.0)
Reading symbols from /lib/x86_64-linux-gnu/libkeyutils.so.1...
(No debugging symbols found in /lib/x86_64-linux-gnu/libkeyutils.so.1)
Reading symbols from /lib/x86_64-linux-gnu/libresolv.so.2...
Reading symbols from /usr/lib/debug/.build-id/82/845af78df2c2866f440f3cae5a8103bd3b5acb.debug...
Reading symbols from /lib/x86_64-linux-gnu/libtirpc.so.3...
(No debugging symbols found in /lib/x86_64-linux-gnu/libtirpc.so.3)
Reading symbols from /lib/x86_64-linux-gnu/libgpg-error.so.0...
(No debugging symbols found in /lib/x86_64-linux-gnu/libgpg-error.so.0)
Reading symbols from /lib/x86_64-linux-gnu/libnss_files.so.2...
Reading symbols from /usr/lib/debug/.build-id/ba/b4b71665bcc7f3f9b142804534c6de15b6e824.debug...
0x00007efcff386dd6 in setdomainname () at ../sysdeps/unix/syscall-template.S:120
120 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb)
(gdb)
(gdb) call fprintf(stderr, "aaah\n")
Program received signal SIGSEGV, Segmentation fault.
0x00007efcffa45425 in malloc (n=6) at dl-minimal.c:50
50 dl-minimal.c: No such file or directory.
warning: Unable to restore previously selected frame.
The program being debugged was signaled while in a function called from GDB.
GDB remains in the frame where the signal was received.
To change this behavior use "set unwindonsignal on".
Evaluation of the expression containing the function
(malloc) will be abandoned.
When the function is done executing, GDB will silently stop.
sshd版本：
root ➜ /devcontainer $ file /usr/sbin/sshd
/usr/sbin/sshd: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=d71ef5505229d585281cb949a536e6d1c1749a77, for GNU/Linux 3.2.0, stripped
gdb版本：
root ➜ /devcontainer $ gdb -v
GNU gdb (Debian 10.1-1.7) 10.1.90.20210103-git
Copyright (C) 2021 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.
root ➜ /devcontainer $ objdump -T /lib/x86_64-linux-gnu/libc.so.6 | grep fprintf
000000000004df90 g DF .text 0000000000000007 GLIBC_2.2.5 _IO_vfprintf
0000000000053c30 w DF .text 00000000000000b3 GLIBC_2.2.5 _IO_fprintf
0000000000109c60 g DF .text 00000000000000bc GLIBC_2.3.4 __fprintf_chk
0000000000053c30 g DF .text 00000000000000b3 GLIBC_2.2.5 fprintf
0000000000109d40 g DF .text 0000000000000018 GLIBC_2.3.4 __vfprintf_chk
000000000004df90 g DF .text 0000000000000007 GLIBC_2.2.5 vfprintf
root ➜ /devcontainer $ objdump -T /usr/sbin/sshd | grep fprintf
0000000000000000 DF *UND* 0000000000000000 GLIBC_2.3.4 __fprintf_chk
Program received signal SIGSEGV, Segmentation fault.
0x00007efcffa45425 in malloc (n=6) at dl-minimal.c:50
这看起来像是 GLIBC 中的一个错误——调用
fprintfmalloc中的
dl-minimal.cc（它应该使用不同的
malloc）。也就是说，在任意时间调用
fprintf
是一个坏主意（TM）。在这里，您可以通过调用
write(2, "aaah\n", 5)来获得完全相同的结果。