Re: [Devel] [PATCH -mm] utrace: fix double free re __rcu_process_callbacks()

2007-04-24 Thread Alexey Dobriyan
On Tue, Apr 24, 2007 at 01:10:23PM +0400, Alexey Dobriyan wrote: > ¹ But I see whole can of other bugs! I think they were already lurking > but weren't easily reproducable without hitting double-free first. > FWIW, it's > BUG_ON(!list_empty(>ptracees)); mmm, pretty easily reproduced

Re: [Devel] [PATCH -mm] utrace: fix double free re __rcu_process_callbacks()

2007-04-24 Thread Kirill Korotaev
Roland, can you please help with it? current utrace state is far from being stable, RHEL5 and -mm kernels can be quite easily crashed with some of the exploits we collected so far. Alexey can help you with any information needed - call traces, test cases, but without your help we can't fix it all

Re: [Devel] [PATCH -mm] utrace: fix double free re __rcu_process_callbacks()

2007-04-24 Thread Kirill Korotaev
Roland, can you please help with it? current utrace state is far from being stable, RHEL5 and -mm kernels can be quite easily crashed with some of the exploits we collected so far. Alexey can help you with any information needed - call traces, test cases, but without your help we can't fix it all

Re: [Devel] [PATCH -mm] utrace: fix double free re __rcu_process_callbacks()

2007-04-24 Thread Alexey Dobriyan
On Tue, Apr 24, 2007 at 01:10:23PM +0400, Alexey Dobriyan wrote: ¹ But I see whole can of other bugs! I think they were already lurking but weren't easily reproducable without hitting double-free first. FWIW, it's BUG_ON(!list_empty(tsk-ptracees)); mmm, pretty easily reproduced