Re: [Xen-devel] [PATCH 04/14] fuzz/x86_emulate: Add a better input size check

2017-09-25 Thread George Dunlap
On Mon, Sep 25, 2017 at 10:36 AM, George Dunlap wrote: > On Fri, Sep 15, 2017 at 12:39 PM, Wei Liu wrote: >> On Fri, Aug 25, 2017 at 05:43:33PM +0100, George Dunlap wrote: >>> For some reason the 'feof()' check for the file size isn't working in >>> llvm-clang-fast mode; the result is several kil

Re: [Xen-devel] [PATCH 04/14] fuzz/x86_emulate: Add a better input size check

2017-09-25 Thread George Dunlap
On Fri, Sep 15, 2017 at 12:39 PM, Wei Liu wrote: > On Fri, Aug 25, 2017 at 05:43:33PM +0100, George Dunlap wrote: >> For some reason the 'feof()' check for the file size isn't working in >> llvm-clang-fast mode; the result is several kilobyte files rather than >> the 4k limit files as we've reques

Re: [Xen-devel] [PATCH 04/14] fuzz/x86_emulate: Add a better input size check

2017-09-15 Thread Wei Liu
On Fri, Aug 25, 2017 at 05:43:33PM +0100, George Dunlap wrote: > For some reason the 'feof()' check for the file size isn't working in > llvm-clang-fast mode; the result is several kilobyte files rather than > the 4k limit files as we've requested. This is bad in part because > AFL will spend time

Re: [Xen-devel] [PATCH 04/14] fuzz/x86_emulate: Add a better input size check

2017-08-25 Thread Andrew Cooper
On 25/08/17 17:43, George Dunlap wrote: > For some reason the 'feof()' check for the file size isn't working in > llvm-clang-fast mode; the result is several kilobyte files rather than > the 4k limit files as we've requested. This is bad in part because > AFL will spend time trying to "fuzz" bits

[Xen-devel] [PATCH 04/14] fuzz/x86_emulate: Add a better input size check

2017-08-25 Thread George Dunlap
For some reason the 'feof()' check for the file size isn't working in llvm-clang-fast mode; the result is several kilobyte files rather than the 4k limit files as we've requested. This is bad in part because AFL will spend time trying to "fuzz" bits of the input that are never touched. Add a new