wget throws segmentation fault

Hello,

I do have a freshly installed system Rocky Linux 9.6 (Blue Onyx) with a 
wget 1.21.1 and rkhunter 1.4.6 installed from repositories, glibc is 
version 2.34.

Sometimes wget throws an error when called by rkhunter. (Unfortunately I 
do have a German system so I just have the German messages)

It does not throw the error when used in other instances, at least I had 
not seen it.

/bin/rkhunter: Zeile 7550: 397708 Speicherzugriffsfehler  (Speicherabzug 
geschrieben) /bin/wget -q -O "/var/lib/rkhunter/rkhunter.upd.Sec52siO9R" 
http://rkhunter.sourceforge.net/1.4/programs_bad.dat 2> /dev/null

Translation by ChatGPT:

/bin/rkhunter: line 7550: 397708 Segmentation fault (core dumped) 
/bin/wget -q -O "/var/lib/rkhunter/rkhunter.upd.Sec52siO9R" 
http://rkhunter.sourceforge.net/1.4/programs_bad.dat 2> /dev/null

So I have figured that the problem lies with wget.

Checking dmesg
--------------

dmesg | grep wget
[21017.289809] wget[33514]: segfault at 1 ip 00007f69f8d65e3d sp 
00007ffe2b8aa058 error 4 in libc.so.6[7f69f8c28000+175000] likely on CPU 
0 (core 0, socket 0)
[21198.953484] wget[50741]: segfault at 1 ip 00007fd472365e3d sp 
00007ffcd3811948 error 4 in libc.so.6[7fd472228000+175000] likely on CPU 
2 (core 0, socket 2)
[21202.668215] wget[50757]: segfault at 1 ip 00007f49bf965e3d sp 
00007fff64280d18 error 4 in libc.so.6[7f49bf828000+175000] likely on CPU 
2 (core 0, socket 2)
[21835.627076] wget[50971]: segfault at 1 ip 00007fd8e7365e3d sp 
00007ffc07fc07c8 error 4 in libc.so.6[7fd8e7228000+175000] likely on CPU 
1 (core 0, socket 1)
[21929.491551] wget[51055]: segfault at 1 ip 00007f050d765e3d sp 
00007ffd77d763b8 error 4 in libc.so.6[7f050d628000+175000] likely on CPU 
1 (core 0, socket 1)
[107505.730188] wget[302437]: segfault at 1 ip 00007f155d565e3d sp 
00007ffe5ddc7d38 error 4 in libc.so.6[7f155d428000+175000] likely on CPU 
3 (core 0, socket 3)

I tried to reinstall wget and glibc without success, the error still is 
thrown.

I tried to debug the error, though I am not an expert and also it took a 
while as the error is not thrown on a regular basis, I had to repeat it 
several times, at least this is the backtrace:

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7965e3d in __strlen_avx2_rtm () from /lib64/libc.so.6
Missing separate debuginfos, use: dnf debuginfo-install 
glibc-2.34-168.el9_6.20.x86_64 gnutls-3.8.3-6.el9.x86_64 
libffi-3.4.2-8.el9.x86_64 libidn2-2.3.0-7.el9.x86_64 
libpsl-0.21.1-5.el9.x86_64 libtasn1-4.16.0-9.el9.x86_64 
libunistring-0.9.10-15.el9.x86_64 libuuid-2.37.4-21.el9.x86_64 
nettle-3.10.1-1.el9.x86_64 p11-kit-0.25.3-3.el9_5.x86_64 
pcre2-10.40-6.el9.x86_64 zlib-1.2.11-40.el9.x86_64
(gdb) bt
#0  0x00007ffff7965e3d in __strlen_avx2_rtm () from /lib64/libc.so.6
#1  0x00007ffff78606c8 in __vfprintf_internal () from /lib64/libc.so.6
#2  0x00007ffff787f55a in __vsnprintf_internal () from /lib64/libc.so.6
#3  0x00007ffff791d255 in __snprintf_chk () from /lib64/libc.so.6
#4  0x000055555558808c in snprintf (__fmt=0x5555555c2895 "%.*f %s", 
__n=20, __s=0x5555555dc0c0 <res> "3,46 ") at /usr/include/bits/stdio2.h:54
#5  retr_rate (bytes=<optimized out>, secs=<optimized out>) at 
/usr/src/debug/wget-1.21.1-8.el9_4.x86_64/src/retr.c:798
#6  0x0000555555583066 in http_loop (u=0x555555605820, 
original_url=0x555555603430, newloc=0x7fffffffe0a8, 
local_file=0x7fffffffe0a0, referer=<optimized out>, dt=0x7fffffffe2a8, 
proxy=0x0, iri=0x555555603400)
     at /usr/src/debug/wget-1.21.1-8.el9_4.x86_64/src/http.c:4745
#7  0x000055555558d4bb in retrieve_url (orig_parsed=0x555555603430, 
origurl=0x7fffffffe7a8 
"http://rkhunter.sourceforge.net/1.4/suspscan.dat", file=0x7fffffffe2b8, 
newloc=0x7fffffffe2b0, refurl=0x0,
     dt=0x7fffffffe2a8, recursive=false, iri=0x555555603400, 
register_status=true) at 
/usr/src/debug/wget-1.21.1-8.el9_4.x86_64/src/retr.c:983
#8  0x000055555556214d in main (argc=<optimized out>, 
argv=0x7fffffffe508) at 
/usr/src/debug/wget-1.21.1-8.el9_4.x86_64/src/main.c:2167

Is this a wget or a glibc error?

With regards,

Markus