linux-kernel - Re: [PATCHv4 bpf-next 2/7] uprobe: Add uretprobe syscall to speed up return probe

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Message-ID: <6c143c648e2eff6c4d4b5e4700d1a8fbcc0f8cbc.camel@intel.com>
Date: Fri, 3 May 2024 19:38:18 +0000
From: "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
To: "olsajiri@...il.com" <olsajiri@...il.com>
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Subject: Re: [PATCHv4 bpf-next 2/7] uprobe: Add uretprobe syscall to speed up
 return probe

+Some more shadow stack folks from other archs. We are discussing how uretprobes
work with shadow stack.

Context:
https://lore.kernel.org/lkml/ZjU4ganRF1Cbiug6@krava/

On Fri, 2024-05-03 at 21:18 +0200, Jiri Olsa wrote:
> 
> hack below seems to fix it for the current uprobe setup,
> we need similar fix for the uretprobe syscall trampoline setup

It seems like a reasonable direction.

Security-wise, applications cannot do this on themselves, or it is an otherwise
privileged thing right?