Messages in this thread | | | Date | Wed, 19 Oct 2016 11:33:27 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] mm: kmemleak: Ensure that the task stack is not freed during scanning |
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On Wed, 12 Oct 2016 10:57:03 +0100 Catalin Marinas <catalin.marinas@arm.com> wrote:
> Commit 68f24b08ee89 ("sched/core: Free the stack early if > CONFIG_THREAD_INFO_IN_TASK") may cause the task->stack to be freed > during kmemleak_scan() execution, leading to either a NULL pointer > fault (if task->stack is NULL) or kmemleak accessing already freed > memory. This patch uses the new try_get_task_stack() API to ensure that > the task stack is not freed during kmemleak stack scanning. > > Fixes: 68f24b08ee89 ("sched/core: Free the stack early if CONFIG_THREAD_INFO_IN_TASK") > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: Andy Lutomirski <luto@kernel.org> > Cc: CAI Qian <caiqian@redhat.com> > Reported-by: CAI Qian <caiqian@redhat.com> > Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
I'll add
Cc: <stable@vger.kernel.org> [4.8.x]
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