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Re: [PATCH 1/2] floppy: add a regression test for CVE-2020-25741


From: Markus Armbruster
Subject: Re: [PATCH 1/2] floppy: add a regression test for CVE-2020-25741
Date: Fri, 19 Mar 2021 06:53:55 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux)

Alexander Bulekov <alxndr@bu.edu> writes:

> dd if=/dev/zero of=/tmp/fda.img bs=1024 count=1440
> cat << EOF | ./qemu-system-i386 -nographic -m 512M -nodefaults \
> -accel qtest -fda /tmp/fda.img -qtest stdio
> outw 0x3f4 0x0500
> outb 0x3f5 0x00
> outb 0x3f5 0x00
> outw 0x3f4 0x00
> outb 0x3f5 0x00
> outw 0x3f1 0x0400
> outw 0x3f4 0x0
> outw 0x3f4 0x00
> outb 0x3f5 0x0
> outb 0x3f5 0x01
> outw 0x3f1 0x0500
> outb 0x3f5 0x00
> EOF
>
> Signed-off-by: Alexander Bulekov <alxndr@bu.edu>

I guess this is a reproducer.  Please also describe actual and expected
result.  Same for PATCH 2.




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