third_party/afl/src/qemu_mode/README.qemu - Issue 2662883002: Roll AFL 2.31b:2.38b and switch coverage to use trace-pc-guard.

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Unified Diff: third_party/afl/src/qemu_mode/README.qemu

Issue 2662883002: Roll AFL 2.31b:2.38b and switch coverage to use trace-pc-guard. (Closed)

Patch Set: Remove unneeded vuln_samples binaries. Created 3 years, 11 months ago

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Index: third_party/afl/src/qemu_mode/README.qemu

diff --git a/third_party/afl/src/qemu_mode/README.qemu b/third_party/afl/src/qemu_mode/README.qemu

index ce4181e4448ce9543cc1f14da0a68e13456c1d6b..f9dce9964b7c6bbc50f6ef6a660f55616461a909 100644

--- a/third_party/afl/src/qemu_mode/README.qemu

+++ b/third_party/afl/src/qemu_mode/README.qemu

@@ -98,6 +98,11 @@ Compared to fully-fledged virtualization, the user emulation mode is *NOT* a

security boundary. The binaries can freely interact with the host OS. If you

somehow need to fuzz an untrusted binary, put everything in a sandbox first.

+QEMU does not necessarily support all CPU or hardware features that your

+target program may be utilizing. In particular, it does not appear to have

+full support for AVX2 / FMA3. Using binaries for older CPUs, or recompiling them

+with -march=core2, can help.

Beyond that, this is an early-stage mechanism, so fields reports are welcome.

You can send them to <afl-users@googlegroups.com>.

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