From: Jiri Olsa <olsajiri@gmail.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
linux-api@vger.kernel.org, linux-man@vger.kernel.org,
x86@kernel.org, bpf@vger.kernel.org,
Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
"Borislav Petkov (AMD)" <bp@alien8.de>,
Ingo Molnar <mingo@redhat.com>, Andy Lutomirski <luto@kernel.org>,
"Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
Deepak Gupta <debug@rivosinc.com>
Subject: Re: [PATCHv6 bpf-next 1/9] x86/shstk: Make return uprobe work with shadow stack
Date: Tue, 21 May 2024 18:54:13 +0200 [thread overview]
Message-ID: <ZkzRtTI72YPAMhIp@krava> (raw)
In-Reply-To: <20240521142221.GA19434@redhat.com>
On Tue, May 21, 2024 at 04:22:21PM +0200, Oleg Nesterov wrote:
> On 05/21, Jiri Olsa wrote:
> >
> > Currently the application with enabled shadow stack will crash
> > if it sets up return uprobe. The reason is the uretprobe kernel
> > code changes the user space task's stack, but does not update
> > shadow stack accordingly.
> >
> > Adding new functions to update values on shadow stack and using
> > them in uprobe code to keep shadow stack in sync with uretprobe
> > changes to user stack.
>
> I don't think my ack has any value in this area but looks good to me.
>
> Reviewed-by: Oleg Nesterov <oleg@redhat.com>
>
>
> > Fixes: 8b1c23543436 ("x86/shstk: Add return uprobe support")
>
> Hmm... Was this commit ever applied?
should have been:
488af8ea7131 x86/shstk: Wire in shadow stack interface
will send new version
thanks,
jirka
>
> Oleg.
>
next prev parent reply other threads:[~2024-05-21 16:54 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-21 10:48 [PATCHv6 bpf-next 0/9] uprobe: uretprobe speed up Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 1/9] x86/shstk: Make return uprobe work with shadow stack Jiri Olsa
2024-05-21 14:22 ` Oleg Nesterov
2024-05-21 16:54 ` Jiri Olsa [this message]
2024-05-30 23:04 ` Edgecombe, Rick P
2024-05-21 10:48 ` [PATCHv6 bpf-next 2/9] uprobe: Wire up uretprobe system call Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 3/9] uprobe: Add uretprobe syscall to speed up return probe Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 4/9] selftests/x86: Add return uprobe shadow stack test Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 5/9] selftests/bpf: Add uretprobe syscall test for regs integrity Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 6/9] selftests/bpf: Add uretprobe syscall test for regs changes Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 7/9] selftests/bpf: Add uretprobe syscall call from user space test Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 bpf-next 8/9] selftests/bpf: Add uretprobe shadow stack test Jiri Olsa
2024-05-21 10:48 ` [PATCHv6 9/9] man2: Add uretprobe syscall page Jiri Olsa
2024-05-21 11:36 ` Alejandro Colomar
2024-05-21 11:48 ` Jiri Olsa
2024-05-21 20:24 ` Jiri Olsa
2024-05-21 20:54 ` Alejandro Colomar
2024-05-22 7:54 ` Jiri Olsa
2024-05-22 10:59 ` Alejandro Colomar
2024-05-22 11:52 ` Jiri Olsa
2024-05-21 20:49 ` [PATCHv6 bpf-next 0/9] uprobe: uretprobe speed up Deepak Gupta
2024-05-21 20:57 ` Alexei Starovoitov
2024-05-22 8:55 ` Jiri Olsa
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