Kees Cook keescook@chromium.org writes:
On Tue, Nov 02, 2021 at 01:22:19PM -0500, Eric W. Biederman wrote:
Kees Cook keescook@chromium.org writes:
On Thu, Oct 28, 2021 at 05:06:53PM -0500, Eric W. Biederman wrote:
Kees Cook keescook@chromium.org writes:
On Thu, Oct 28, 2021 at 12:26:26PM -0500, Eric W. Biederman wrote:
Is it a problem that the debugger can see the signal if the process does not?
Right, I'm trying to understand that too. However, my neighbor just lost power. :|
What I was in the middle of checking was what ptrace "sees" going through a fatal SIGSYS; my initial debugging attempts were weird.
Kees have you regained power and had a chance to see my SA_IMMUTABLE patch?
Apologies; I got busy with other stuff, but I've tested this now. It's happy and I see the expected behaviors again. Note that I used the patch with this change:
-#define SA_IMMUTABLE 0x008000000 +#define SA_IMMUTABLE 0x00800000
Tested-by: Kees Cook keescook@chromium.org
Thanks.
And I see you have written a test as well that should keep this kind of bug from happening again.
Eric