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From: "liaichun at huawei dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug nss/26038] [core_dump] call getpwnam_r() appears core_dump
Date: Mon, 25 May 2020 09:33:54 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D26038

--- Comment #1 from liaichun <liaichun at huawei dot com> ---
here is my debug code, i increased the judgment of fct, and triggered it
  else
    {
      fct.l =3D start_fct;=20=20=20
      nip =3D startp;
if (fct.l =3D=3D 0x0)=20=20=20=20=20=20=20=20=20=20=20=20
   *(int=C2=A0*)0=C2=A0=3D=C2=A00=C2=A0=20=20=20
    }

#0  __getpwnam_r (name=3D0xffffbd62f940 <g_logOwner> "snasuser",
resbuf=3D0xffffbd0257a8, buffer=3D0xffffbd0257d8 "", buflen=3D96, result=3D=
0x0) at
../nss/getXXbyYY_r.c:306
306             *(int *)0 =3D 0;
[Current thread is 1 (Thread 0xffffbd0261d0 (LWP 83654))]
Missing separate debuginfos, use: dnf debuginfo-install
snas-cm-3.6.1.126270-1.aarch64
(gdb) bt
#0  __getpwnam_r (name=3D0xffffbd62f940 <g_logOwner> "snasuser",
resbuf=3D0xffffbd0257a8, buffer=3D0xffffbd0257d8 "", buflen=3D96, result=3D=
0x0) at
../nss/getXXbyYY_r.c:306
#1  0x0000ffffbd46c7d4 in __LOG_LogSetOwner (fd=3D7) at base_log.c:1778
#2  0x0000ffffbd46b988 in Base_Log_FileNeedExport (iFd=3D3, pcPath=3D0xffff=
bd025938
"/var/log/snas_CM.log", moduleId=3DMODULE_CM) at base_log.c:942
#3  0x0000ffffbd46ca1c in __LOG_LogSelfTask (pArgv=3D0xffffbd638198 <g_acSu=
bSys>)
at base_log.c:1874
#4  0x0000ffffbe4538bc in start_thread (arg=3D0xffffc2be497f) at
pthread_create.c:486
#5  0x0000ffffbd1fda1c in thread_start () at
../sysdeps/unix/sysv/linux/aarch64/clone.S:78
(gdb)

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