Re: [PATCH -tip v4 10/12] x86/kprobes: Push a fake return address at kretprobe_trampoline
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- To: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
- Subject: Re: [PATCH -tip v4 10/12] x86/kprobes: Push a fake return address at kretprobe_trampoline
- From: Steven Rostedt <rostedt@xxxxxxxxxxx>
- Date: Fri, 26 Mar 2021 10:20:09 -0400
- Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, X86 ML <x86@xxxxxxxxxx>, Daniel Xu <dxu@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, bpf@xxxxxxxxxxxxxxx, kuba@xxxxxxxxxx, mingo@xxxxxxxxxx, ast@xxxxxxxxxx, tglx@xxxxxxxxxxxxx, kernel-team@xxxxxx, yhs@xxxxxx, Josh Poimboeuf <jpoimboe@xxxxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx, Abhishek Sagar <sagar.abhishek@xxxxxxxxx>
- In-reply-to: <20210326210349.22f6d34b229dd3a139a53686@kernel.org>
- References: <161639518354.895304.15627519393073806809.stgit@devnote2> <161639530062.895304.16962383429668412873.stgit@devnote2> <20210323223007.GG4746@worktop.programming.kicks-ass.net> <20210324104058.7c06aaeb0408e24db6ba46f8@kernel.org> <20210326030503.7fa72da34e25ad35cf5ed3de@kernel.org> <20210326210349.22f6d34b229dd3a139a53686@kernel.org>
On Fri, 26 Mar 2021 21:03:49 +0900
Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote:
> I confirmed this is not related to this series, but occurs when I build kernels with different
> configs without cleanup.
>
> Once I build kernel with CONFIG_UNWIND_GUESS=y (for testing), and after that,
> I build kernel again with CONFIG_UNWIND_ORC=y (but without make clean), this
> happened. In this case, I guess ORC data might be corrupted?
> When I cleanup and rebuild, the stacktrace seems correct.
Hmm, that should be fixed. Seems like we are missing a dependency somewhere.
-- Steve
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