[Xen-changelog] [xen master] fuzz: update README.afl example

[patchbot@xxxxxxx]

commit 55a04feaa1f8ab6ef7d723fbb1d39c6b96ad184a
Author:     Wei Liu <wei.liu2@xxxxxxxxxx>
AuthorDate: Wed Jan 25 15:40:44 2017 +0000
Commit:     Wei Liu <wei.liu2@xxxxxxxxxx>
CommitDate: Mon Feb 6 10:15:49 2017 +0000

    fuzz: update README.afl example
    
    Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 tools/fuzz/README.afl | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/fuzz/README.afl b/tools/fuzz/README.afl
index 431b4a8..68e0fa3 100644
--- a/tools/fuzz/README.afl
+++ b/tools/fuzz/README.afl
@@ -20,9 +20,10 @@ Use the x86 instruction emulator fuzzer as an example.
    $ make distclean
    $ make CC=$AFLPATH/afl-gcc afl # produces afl-x86-insn-emulator-fuzzer
 
-3. provide initial test case:
+3. provide initial test case (fuzzer dependent, see afl-*.c):
    $ mkdir testcase_dir
-   $ echo -n -e '\xc3' > testcase_dir/ret.bin
+   $ dd if=/dev/urandom of=testcase_dir/rand.bin \
+       bs=`./afl-x86-insn-emulator-fuzzer --min-input-size` count=1
 
 4. run the fuzzer with AFL:
    $ $AFLPATH/afl-fuzz -m none -t 1000 -i testcase_dir -o findings_dir -- \
--
generated by git-patchbot for /home/xen/git/xen.git#master

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