Thread (25 messages) 25 messages, 3 authors, 2019-08-02

Re: [PATCH v3] kasan: add memory corruption identification for software tag-based mode

From: Andrey Ryabinin <hidden>
Date: 2019-07-26 12:52:17
Also in: linux-mediatek, linux-mm, lkml


On 7/26/19 3:28 PM, Walter Wu wrote:
On Fri, 2019-07-26 at 15:00 +0300, Andrey Ryabinin wrote:
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I remember that there are already the lists which you concern. Maybe we
can try to solve those problems one by one.

1. deadlock issue? cause by kmalloc() after kfree()?
smp_call_on_cpu()
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2. decrease allocation fail, to modify GFP_NOWAIT flag to GFP_KERNEL?
No, this is not gonna work. Ideally we shouldn't have any allocations there.
It's not reliable and it hurts performance.
I dont know this meaning, we need create a qobject and put into
quarantine, so may need to call kmem_cache_alloc(), would you agree this
action?
How is this any different from what you have now?

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