upx 3.96 mips: static binary not properly executed (runs forever)

[develBuzz]

Upload of files not working:
https://drive.google.com/file/d/1izEeUYWLczkspAD4XysVoAV8O_6N4TKN/view?usp=sharing

What's the problem (or question)?

I'm using upx on debian 10.4 (amd64) to compress a binary for openwrt on a WNDR3700v4 (mips 32-bit).
Afer copying the file to my router, the binary compressed with upx-3.96 isn't executed properly. it runs forever and eating nearly all of my CPU-time.
If i'm compressing the same file with upx-3.95 it runs fine and the proccess will finish within a second.

Tested this with different versions of the binary and it's always the same result.

Here is some kind of log for my testings:

With upx 3.95 (after copying the file to the router)

1. ls -al
   -rwxr-xr-x 1 root root 2.3M Jul 16 09:41 dnscrypt-proxy-upx-3.95

2. file dnscrypt-proxy-upx-3.95
   dnscrypt-proxy-upx-3.95: ELF 32-bit MSB executable, MIPS, MIPS32 version 1 (SYSV), statically linked, no section header

3. ./dnscrypt-proxy-upx-3.95 -config /etc/config/dnscrypt-proxy.toml -check
   [2020-07-16 07:45:23] [NOTICE] dnscrypt-proxy 2.0.44
   [2020-07-16 07:45:23] [NOTICE] Source [public-resolvers] loaded
   [2020-07-16 07:45:23] [NOTICE] Source [relays] loaded
   [2020-07-16 07:45:23] [NOTICE] Configuration successfully checked

With upx 3.96 (after copying the file to the router)

1. ls -al
   -rwxr-xr-x 1 root root 2.3M Jul 16 09:41 dnscrypt-proxy-upx-3.96 (same timestamp due to copy)

2. file dnscrypt-proxy-upx-3.96
   dnscrypt-proxy-upx-3.96: ELF 32-bit MSB executable, MIPS, MIPS32 version 1 (SYSV), statically linked, no section header

3. ./dnscrypt-proxy-upx-3.96 -config /etc/config/dnscrypt-proxy.toml -check

   after some time htop shows:
   pid:2657 user:root pri:20 ni:0 virt:12280 res:5960 shr:988 cpu:96,2 mem:4,8 time+:3:46.85
   command ./dnscrypt-proxy-upx-3.96 -config /etc/config/dnscrypt-proxy.toml -check

What should have happened?

The same as with upx 3.95, programm should finish within a short time frame.

Do you have an idea for a solution?

No.

How can we reproduce the issue?

It might be enough to have a device with mips 32-bit support.

1. upx-3.96 --lzma dnscrypt-proxy-upx-3.96
2. copy file to target system
3. run ./dnscrypt-proxy-upx-3.96 -config /etc/config/dnscrypt-proxy.toml -check

Please tell us details about your environment.

upx-3.95 --version
upx 3.95
NRV data compression library 0.84
UCL data compression library 1.03
zlib data compression library 1.2.3
LZMA SDK version 4.43
Copyright (C) 1996-2018 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1996-2018 Laszlo Molnar
Copyright (C) 2000-2018 John F. Reiser
Copyright (C) 2002-2018 Jens Medoch
Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
Copyright (C) 1999-2006 Igor Pavlov
UPX comes with ABSOLUTELY NO WARRANTY; for details type 'upx-3.95 -L'.

upx-3.96 --version
upx 3.96
NRV data compression library 0.84
UCL data compression library 1.03
zlib data compression library 1.2.3
LZMA SDK version 4.43
Copyright (C) 1996-2020 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1996-2020 Laszlo Molnar
Copyright (C) 2000-2020 John F. Reiser
Copyright (C) 2002-2020 Jens Medoch
Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
Copyright (C) 1999-2006 Igor Pavlov
UPX comes with ABSOLUTELY NO WARRANTY; for details type 'upx-3.96 -L'.

• Host Operating System and version: debian 10.4 amd64
  Linux deb-61 4.19.0-9-amd64 README File points to old URL #1 SMP Debian 4.19.118-2+deb10u1 (2020-06-07) x86_64 GNU/Linux

• Host CPU architecture:
  AMD Ryzen 5 3550H with Radeon Vega Mobile Gfx

• Target Operating System and version:
  OpenWRT 19.07.3 for Netgear WNDR3700v4
  Linux owrt_e_master 4.14.180 #0 Sat May 16 18:32:20 2020 mips GNU/Linux

• Target CPU architecture:
  Atheros AR9344 rev 2,
  cpu: MIPS 74Kc V4.12

Upload of files not working:
https://drive.google.com/file/d/1izEeUYWLczkspAD4XysVoAV8O_6N4TKN/view?usp=sharing

[jreiser]

This is the same as #342 and #339 which was fixed on the devel branch:

commit 4fb1d41be8acd16849fab9622f35903d3fc4a7d9
Date:   Sat Feb 8 19:55:08 2020 -0800

see also

commit 16b18e939641663806ae4862114b4b556883c7de
Date:   Tue May 26 14:49:25 2020 -0700

Pre-built UPX may be available under https://github.com/upx/upx-automatic-builds/branches

[develBuzz]

Thank you, i searched open issues only. I'm closing it.