afl-qemu-trace-32 and afl-qemu-trace-64

[ele7enxxh]

Hi,

Sometimes, I need to perform fuzz testing on both 32-bit and 64 bit programs simultaneously. The current compilation and installation will overwrite the previous product afl-qemu-trace binary. Can you add a suffix to distinguish between the two? For example: afl-qemu-trace-32 and afl-qemu-trace-64.

Thanks.

[vanhauser-thc]

and how would afl-fuzz know which qemu binary to call? and what if someone wants that for arm64, mips etc.?
that just adds complexity on top that is not helpful I think.
the easy solution:

make
cd ..
cp -r AFLplusplus AFLplusplus32
cd AFLplusplus32/qemu_mode
export CPU_TARGET=i386
./build_qemu_support.sh

and then when fuzzing your simply set AFL_PATH to either /path/to/AFLplusplus or /path/to/AFLplusplus2

[p21nc3]

Hi @vanhauser-thc agreed with your point of considering other architectures. but having an binary selection method (dynamically) would work for this. lets say having a configuration setting for the users to configure the archi's they want to target. give it a thought ✌️

[ele7enxxh]

Hi, @vanhauser-thc, I think afl-fuzz can automatically select a specific afl-qemu-trace(eg. afl-qemu-trace-arm, afl-qemu-trace-aarch64) by checking the file architecture of the target binary.

[vanhauser-thc]

Yeah that would be possible. I have no time for this though as I work on something for a presentation at the ccc congress.
You can send a PR if you think it is an important thing to have.

[p21nc3]

Hi, @vanhauser-thc, I think afl-fuzz can automatically select a specific afl-qemu-trace(eg. afl-qemu-trace-arm, afl-qemu-trace-aarch64) by checking the file architecture of the target binary.

Hi @ele7enxxh, are you working on this ?

[ele7enxxh]

Hi, @vanhauser-thc, I think afl-fuzz can automatically select a specific afl-qemu-trace(eg. afl-qemu-trace-arm, afl-qemu-trace-aarch64) by checking the file architecture of the target binary.

Hi @ele7enxxh, are you working on this ?

No, Do you have free time to do it?

[p21nc3]

@ele7enxxh Sure, on it!