[Bug nss/26038] [core_dump] call getpwnam_r() appears core_dump

["liaichun at huawei dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=26038

--- Comment #10 from liaichun <liaichun at huawei dot com> ---
(In reply to Andreas Schwab from comment #9)
> nip should of course be a valid heap address or -1.

Sorry, i removed all my edits，and tried for a long time，it finally reappeared.

(gdb) p __pointer_chk_guard
$1 = 8256925845475092582
(gdb) p * __pointer_chk_guard
Cannot access memory at address 0x72967e4f3448e866
(gdb) p/x __pointer_chk_guard
$2 = 0x72967e4f3448e866
(gdb) bt
#0  0x72967e4f3448e866 in ?? ()
#1  0x0000ffff980683a4 in __getpwnam_r (name=0xffff984ca940 <g_logOwner>
"snasuser", resbuf=0xffff975be868, buffer=0xffff975be898 "", buflen=96,
result=0x0) at ../nss/getXXbyYY_r.c:315
#2  0x0000ffff983077d4 in __LOG_LogSetOwner (fd=7) at base_log.c:1778
#3  0x0000ffff98308cc0 in __LOG_Common_LogSelfTask (pArgv=0xffff991a1df8
<g_stLogUserAuditMgt>) at base_log.c:2588
#4  0x0000ffff992ee8bc in start_thread (arg=0xfffffcac7aff) at
pthread_create.c:486
#5  0x0000ffff980989dc in thread_start () at
../sysdeps/unix/sysv/linux/aarch64/clone.S:78
(gdb) info local
startp_initialized = true
startp = 0x7296d4e5ca99a906
start_fct = 0x729681b0a29137c6
nip = 0x72967e4f3448e866
do_merge = 0
mergegrp = <optimized out>
mergebuf = 0xffff9841a658 "V100R001C01"
endptr = 0x0
fct = {l = 0x72967e4f3448e866, ptr = 0x72967e4f3448e866}
no_more = 0
err = <optimized out>
status = NSS_STATUS_UNAVAIL
nscd_status = <optimized out>
res = <optimized out>
(gdb) exit

nip is 0x72967e4f3448e866 after PTR_DEMANGLE, so i guess nip is zero before
PTR_DEMANGLE?

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