On Thu, Sep 17, 2020 at 11:35:40AM +, George Popescu wrote:
> On Thu, Sep 17, 2020 at 08:37:07AM +0200, Marco Elver wrote:
> > So, it seems that local-bounds can still catch some rare OOB accesses,
> > where KASAN fails to catch it because the access might skip over the
> > redzone.
> >
> > Th
On Tue, Sep 15, 2020 at 10:24:58AM +, George Popescu wrote:
> This would mean losing the local-bounds coverage. I tried to test it without
> local-bounds and with a locally defined array on the stack and it works fine
> (the handler is called and the error reported). For me it feels like
> --a
On Thu, Sep 17, 2020 at 08:37:07AM +0200, Marco Elver wrote:
> On Wed, 16 Sep 2020 at 15:40, Marco Elver wrote:
> > On Wed, Sep 16, 2020 at 12:14PM +, George Popescu wrote:
> > > On Wed, Sep 16, 2020 at 10:32:40AM +0200, Marco Elver wrote:
> > > > On Wed, 16 Sep 2020 at 09:40, George Popescu
On Wed, 16 Sep 2020 at 15:40, Marco Elver wrote:
> On Wed, Sep 16, 2020 at 12:14PM +, George Popescu wrote:
> > On Wed, Sep 16, 2020 at 10:32:40AM +0200, Marco Elver wrote:
> > > On Wed, 16 Sep 2020 at 09:40, George Popescu
> > > wrote:
> > > > On Tue, Sep 15, 2020 at 07:32:28PM +0200, Marco
On Wed, Sep 16, 2020 at 12:14PM +, George Popescu wrote:
> On Wed, Sep 16, 2020 at 10:32:40AM +0200, Marco Elver wrote:
> > On Wed, 16 Sep 2020 at 09:40, George Popescu wrote:
> > > On Tue, Sep 15, 2020 at 07:32:28PM +0200, Marco Elver wrote:
> > > > On Tue, 15 Sep 2020 at 14:01, George Popesc
On Wed, 16 Sep 2020 at 09:40, George Popescu wrote:
>
> On Tue, Sep 15, 2020 at 07:32:28PM +0200, Marco Elver wrote:
> > On Tue, 15 Sep 2020 at 14:01, George Popescu wrote:
> > >
> > > On Tue, Sep 15, 2020 at 01:18:11PM +0200, Marco Elver wrote:
> > > > On Tue, 15 Sep 2020 at 12:25, George Popesc
On Tue, Sep 15, 2020 at 07:32:28PM +0200, Marco Elver wrote:
> On Tue, 15 Sep 2020 at 14:01, George Popescu wrote:
> >
> > On Tue, Sep 15, 2020 at 01:18:11PM +0200, Marco Elver wrote:
> > > On Tue, 15 Sep 2020 at 12:25, George Popescu
> > > wrote:
> > > > On Mon, Sep 14, 2020 at 03:13:14PM -0700
On Tue, 15 Sep 2020 at 14:01, George Popescu wrote:
>
> On Tue, Sep 15, 2020 at 01:18:11PM +0200, Marco Elver wrote:
> > On Tue, 15 Sep 2020 at 12:25, George Popescu wrote:
> > > On Mon, Sep 14, 2020 at 03:13:14PM -0700, Kees Cook wrote:
> > > > On Mon, Sep 14, 2020 at 05:27:42PM +, George-Au
On Tue, Sep 15, 2020 at 01:18:11PM +0200, Marco Elver wrote:
> On Tue, 15 Sep 2020 at 12:25, George Popescu wrote:
> > On Mon, Sep 14, 2020 at 03:13:14PM -0700, Kees Cook wrote:
> > > On Mon, Sep 14, 2020 at 05:27:42PM +, George-Aurelian Popescu wrote:
> > > > From: George Popescu
> > > >
> >
On Tue, 15 Sep 2020 at 12:25, George Popescu wrote:
> On Mon, Sep 14, 2020 at 03:13:14PM -0700, Kees Cook wrote:
> > On Mon, Sep 14, 2020 at 05:27:42PM +, George-Aurelian Popescu wrote:
> > > From: George Popescu
> > >
> > > When the kernel is compiled with Clang, UBSAN_BOUNDS inserts a brk a
On Mon, Sep 14, 2020 at 03:13:14PM -0700, Kees Cook wrote:
> On Mon, Sep 14, 2020 at 05:27:42PM +, George-Aurelian Popescu wrote:
> > From: George Popescu
> >
> > When the kernel is compiled with Clang, UBSAN_BOUNDS inserts a brk after
> > the handler call, preventing it from printing any inf
On Mon, Sep 14, 2020 at 05:27:42PM +, George-Aurelian Popescu wrote:
> From: George Popescu
>
> When the kernel is compiled with Clang, UBSAN_BOUNDS inserts a brk after
> the handler call, preventing it from printing any information processed
> inside the buffer.
> For Clang -fsanitize=bounds
+ kernel-dynamic-tools to help review.
On Mon, Sep 14, 2020 at 10:28 AM George-Aurelian Popescu
wrote:
>
> From: George Popescu
>
> When the kernel is compiled with Clang, UBSAN_BOUNDS inserts a brk after
> the handler call, preventing it from printing any information processed
> inside the buff
From: George Popescu
When the kernel is compiled with Clang, UBSAN_BOUNDS inserts a brk after
the handler call, preventing it from printing any information processed
inside the buffer.
For Clang -fsanitize=bounds expands to -fsanitize=array-bounds and
-fsanitize=local-bounds, and the latter adds
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