First post, by Kahenraz
- Rank
- l33t
I'm running Spelling Jungle / Yobi's Basic Spelling Tricks in DOSBox and it's crashing when CPU core is set to "auto" when using the -forcescaler option. Manually setting the core to either "normal" or "dynamic" does not cause a crash. However, this may not be consistent. I believe it was still crashing with "normal" until I rebooted-- I'm not entirely sure.
https://en.wikipedia.org/wiki/Spelling_Jungle
$ dosbox -forcescaler advmame2x -noconsole -exit -conf config -c exitDOSBox version 0.74-3Copyright 2002-2019 DOSBox Team, published under GNU GPL.---CONFIG:Loading primary settings from config file configMIXER:Got different values from SDL: freq 44100, blocksize 512ALSA:Can't subscribe to MIDI port (65:0) nor (17:0)MIDI:Opened device:noneSetting excute permission on the code cache has failedSegmentation fault (core dumped)
This makes SELinux very unhappy:
SELinux is preventing dosbox from using the execheap access on a process.***** Plugin allow_execheap (53.1 confidence) suggests ********************If you do not think dosbox should need to map heap memory that is both writable and executable.Then you need to report a bug. This is a potentially dangerous access.Docontact your security administrator and report this issue.***** Plugin catchall_boolean (42.6 confidence) suggests ******************If you want to allow selinuxuser to execheapThen you must tell SELinux about this by enabling the 'selinuxuser_execheap' boolean.Dosetsebool -P selinuxuser_execheap 1***** Plugin catchall (5.76 confidence) suggests **************************If you believe that dosbox should be allowed execheap access on processes labeled unconfined_t by default.Then you should report this as a bug.You can generate a local policy module to allow this access.Doallow this access for now by executing:# ausearch -c 'dosbox' --raw | audit2allow -M my-dosbox# semodule -X 300 -i my-dosbox.ppAdditional Information:Source Context unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023Target Context unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023Target Objects Unknown [ process ]Source dosboxSource Path dosboxPort <Unknown>Host hpenvy13mSource RPM PackagesTarget RPM PackagesPolicy RPM selinux-policy-3.14.3-43.fc30.noarchSelinux Enabled TruePolicy Type targetedEnforcing Mode EnforcingHost Name hpenvy13mPlatform Linux hpenvy13m 5.2.9-200.fc30.x86_64 #1 SMP FriAug 16 21:37:45 UTC 2019 x86_64 x86_64Alert Count 11First Seen 2019-09-01 13:30:01 EDTLast Seen 2019-09-01 14:13:35 EDTLocal ID 6127a617-2a1d-4794-9c8d-e669685983edRaw Audit Messagestype=AVC msg=audit(1567361615.991:767): avc: denied { execheap } for pid=14106 comm="dosbox" scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=process permissive=0Hash: dosbox,unconfined_t,unconfined_t,process,execheap
Out of curiosity, I ran it as root to bypass the policy and my system immediately locked up after displaying the game splash screen. On the plus side, it scaled correctly for the first frame.
This affects my Ryzen 7 2700U laptop running Fedora 30 x86_64. The exact same options work on my other laptop running an old Intel netbook processor and Fedora i686.
Running this game is a little bit more complicated as it has to first load Windows 3.1 and then launch the game.
The game requires 8-bit color mode, if that makes a difference.
