On 11/15, Oleg Nesterov wrote:
On 11/13, Oleg Nesterov wrote:
Roland, I pulled the last changes in your tree (utrace-cleanup merged
in utrace-ptrace) and did some testing.
In short: utrace-ptrace does not work at all.
It fails a lot (if not most) of tests, in particular
On 11/15, Oleg Nesterov wrote:
With this patch the kernel passes all tests except single-step ones, as
expected.
Forgot to mention, your tree lacks these patches we sent upstream:
ptrace-introduce-user_single_step_siginfo-helper.patch
I forgot about make xcheck, it crashes the kernel. Fortunately the
kernel dumps the stack trace. Trust me, it wasn't easy to notice the
missing return ;) I am wondering why the compiler doesn't complain.
Roland, this all needs more fixes. Look at the fixed code,
utrace = target-utrace;
On 11/16, Oleg Nesterov wrote:
UPD: tested the kernel with this patch, now late-ptrace-may-attach-check
crashes the kernel silently (no output under kvm).
Repeated this test. Got several oopses, bad spinlock magic in utrace-lock.
The stack trace varies, often from utrace_get_signal().
Oh,
