Re: [PATCH] fuzz: Add more i386 configurations for fuzzing

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 12/2/20 5:40 PM, Alexander Bulekov wrote:
> On 201123 1343, Alexander Bulekov wrote:
>> This adds configurations for fuzzing the following devices on oss-fuzz:
>>
...
>> I have little context for how useful these configurations are for
>> fuzzing. I appreciate if you can Ack/Nack them or provide feedback if
>> the devices should be configured differently.  Of course, if you think
>> we should be fuzzing some additional device configurations, you can also
>> submit a patch adding the necessary lines to this generic_fuzz_configs.h
>> file. 
>> Thanks
>> -Alex
>>
> 
> Ping. We could just add all of these configurations and, later, remove
> any that produce too many useless reports.

Not a Nack, but I'd rather enhance qtest coverage by adding
these configs via <libqos/qgraph.h>, and then consume this
with tests/qtest/fuzz/qos_fuzz.c.

>>  tests/qtest/fuzz/generic_fuzz_configs.h | 80 +++++++++++++++++++++++++
>>  1 file changed, 80 insertions(+)
>>
>> diff --git a/tests/qtest/fuzz/generic_fuzz_configs.h b/tests/qtest/fuzz/generic_fuzz_configs.h
>> index c4d925f9e6..0b1fe0f836 100644
>> --- a/tests/qtest/fuzz/generic_fuzz_configs.h
>> +++ b/tests/qtest/fuzz/generic_fuzz_configs.h
>> @@ -115,6 +115,86 @@ const generic_fuzz_config predefined_configs[] = {
>>          .name = "pc-q35",
>>          .args = "-machine q35",
>>          .objects = "*",
>> +    },{
>> +        .name = "vmxnet3",
>> +        .args = "-machine q35 -nodefaults "
>> +        "-device vmxnet3,netdev=net0 -netdev user,id=net0",
>> +        .objects = "vmxnet3"
>> +    },{
>> +        .name = "ne2k_pci",
>> +        .args = "-machine q35 -nodefaults "
>> +        "-device ne2k_pci,netdev=net0 -netdev user,id=net0",
>> +        .objects = "ne2k*"
>> +    },{
>> +        .name = "pcnet",
>> +        .args = "-machine q35 -nodefaults "
>> +        "-device pcnet,netdev=net0 -netdev user,id=net0",
>> +        .objects = "pcnet"
>> +    },{
>> +        .name = "rtl8139",
>> +        .args = "-machine q35 -nodefaults "
>> +        "-device rtl8139,netdev=net0 -netdev user,id=net0",
>> +        .objects = "rtl8139"
>> +    },{
>> +        .name = "i82550",
>> +        .args = "-machine q35 -nodefaults "
>> +        "-device i82550,netdev=net0 -netdev user,id=net0",
>> +        .objects = "eepro*"
>> +    },{
>> +        .name = "sdhci-v3",
>> +        .args = "-nodefaults -device sdhci-pci,sd-spec-version=3 "
>> +        "-device sd-card,drive=mydrive "
>> +        "-drive if=sd,index=0,file=null-co://,format=raw,id=mydrive -nographic",
>> +        .objects = "sd*"
>> +    },{
>> +        .name = "ehci",
>> +        .args = "-machine q35 -nodefaults "
>> +        "-device ich9-usb-ehci1,bus=pcie.0,addr=1d.7,"
>> +        "multifunction=on,id=ich9-ehci-1 "
>> +        "-device ich9-usb-uhci1,bus=pcie.0,addr=1d.0,"
>> +        "multifunction=on,masterbus=ich9-ehci-1.0,firstport=0 "
>> +        "-device ich9-usb-uhci2,bus=pcie.0,addr=1d.1,"
>> +        "multifunction=on,masterbus=ich9-ehci-1.0,firstport=2 "
>> +        "-device ich9-usb-uhci3,bus=pcie.0,addr=1d.2,"
>> +        "multifunction=on,masterbus=ich9-ehci-1.0,firstport=4 "
>> +        "-drive if=none,id=usbcdrom,media=cdrom "
>> +        "-device usb-tablet,bus=ich9-ehci-1.0,port=1,usb_version=1 "
>> +        "-device usb-storage,bus=ich9-ehci-1.0,port=2,drive=usbcdrom",
>> +        .objects = "*usb* *hci*",
>> +    },{
>> +        .name = "ohci",
>> +        .args = "-machine q35 -nodefaults  -device pci-ohci -device usb-kbd",
>> +        .objects = "*usb* *ohci*",
>> +    },{
>> +        .name = "megaraid",
>> +        .args = "-machine q35 -nodefaults -device megasas -device scsi-cd,drive=null0 "
>> +        "-blockdev driver=null-co,read-zeroes=on,node-name=null0",
>> +        .objects = "megasas*",
>> +    },{
>> +        .name = "ac97",
>> +        .args = "-machine q35 -nodefaults "
>> +        "-device ac97,audiodev=snd0 -audiodev none,id=snd0 -nodefaults",
>> +        .objects = "ac97*",
>> +    },{
>> +        .name = "cs4231a",
>> +        .args = "-machine q35 -nodefaults "
>> +        "-device cs4231a,audiodev=snd0 -audiodev none,id=snd0 -nodefaults",
>> +        .objects = "cs4231a* i8257*",
>> +    },{
>> +        .name = "es1370",
>> +        .args = "-machine q35 -nodefaults "
>> +        "-device es1370,audiodev=snd0 -audiodev none,id=snd0 -nodefaults",
>> +        .objects = "es1370*",
>> +    },{
>> +        .name = "sb16",
>> +        .args = "-machine q35 -nodefaults "
>> +        "-device sb16,audiodev=snd0 -audiodev none,id=snd0 -nodefaults",
>> +        .objects = "sb16* i8257*",
>> +    },{
>> +        .name = "parallel",
>> +        .args = "-machine q35 -nodefaults "
>> +        "-parallel file:/dev/null",
>> +        .objects = "parallel*",
>>      }
>>  };
>>  
>> -- 
>> 2.28.0
>>
>