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Date: Wed, 9 Mar 2022 09:58:44 +0100 (CET) From: Miroslav Benes <mbenes@...e.cz> To: Peter Zijlstra <peterz@...radead.org> cc: x86@...nel.org, joao@...rdrivepizza.com, hjl.tools@...il.com, jpoimboe@...hat.com, andrew.cooper3@...rix.com, linux-kernel@...r.kernel.org, ndesaulniers@...gle.com, keescook@...omium.org, samitolvanen@...gle.com, mark.rutland@....com, alyssa.milburn@...el.com, rostedt@...dmis.org, mhiramat@...nel.org, alexei.starovoitov@...il.com Subject: Re: [PATCH v4 19/45] x86/livepatch: Validate __fentry__ location On Tue, 8 Mar 2022, Peter Zijlstra wrote: > Currently livepatch assumes __fentry__ lives at func+0, which is most > likely untrue with IBT on. Instead make it use ftrace_location() by > default which both validates and finds the actual ip if there is any > in the same symbol. > > Suggested-by: Josh Poimboeuf <jpoimboe@...hat.com> > Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org> Acked-by: Miroslav Benes <mbenes@...e.cz> M
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