Hello,

another addition to the problem:
The problem does not seem to be directly related to the custom kernel or the one yocto, as I can recreate the problem in a second yocto.

The yocto is for the qemuarm "virt" machine. I have the complete sources for it here: https://github.com/matthiasklein/meta-yocto-coffee-qemuarm

Is it possible that it is somehow related to 32 bit ARM?

# uname -a
Linux qemuarm 5.15.16-yocto-standard #1 SMP PREEMPT Tue Jan 25 14:32:58 UTC 2022 armv7l GNU/Linux

# wget -4 https://speed.hetzner.de/100MB.bin
--2022-02-03 09:18:37-- https://speed.hetzner.de/100MB.bin
SSL_INIT
Resolving speed.hetzner.de... 88.198.248.254
Connecting to speed.hetzner.de|88.198.248.254|:443... connected.
The certificate has not yet been activated

# wget --version
GNU Wget 1.21.2 built on linux-gnueabi.

-cares +digest -gpgme +https +ipv6 -iri +large-file -metalink +nls
+ntlm +opie -psl +ssl/gnutls

Wgetrc:
/etc/wgetrc (system)
Locale:
/usr/share/locale
Compile:
arm-poky-linux-gnueabi-gcc -mthumb -mfpu=neon -mfloat-abi=hard
-mcpu=cortex-a15 -fstack-protector-strong -O2 -D_FORTIFY_SOURCE=2
-Wformat -Wformat-security -Werror=format-security -DHAVE_CONFIG_H
-DSYSTEM_WGETRC="/etc/wgetrc" -DLOCALEDIR="/usr/share/locale" -I.
-I../../wget-1.21.2/src -I../lib -I../../wget-1.21.2/lib -DNDEBUG
-O2 -pipe -g -feliminate-unused-debug-types
Link:
arm-poky-linux-gnueabi-gcc -mthumb -mfpu=neon -mfloat-abi=hard
-mcpu=cortex-a15 -fstack-protector-strong -O2 -D_FORTIFY_SOURCE=2
-Wformat -Wformat-security -Werror=format-security -DNDEBUG -O2
-pipe -g -feliminate-unused-debug-types -Wl,-O1
-Wl,--hash-style=gnu -Wl,--as-needed -Wl,-z,relro,-z,now -lpcre
-lnettle -lgnutls -lz ftp-opie.o gnutls.o http-ntlm.o
../lib/libgnu.a -lunistring

Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://www.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.

Originally written by Hrvoje Niksic <hniksic@...>.
Please send bug reports and questions to <bug-wget@...>.

Best regards,
Matthias