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[130.111.218.23]) by smtp.gmail.com with ESMTPSA id e126sm7523181qkd.45.2018.05.01.12.59.34 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 01 May 2018 12:59:35 -0700 (PDT) From: Vince Weaver X-Google-Original-From: Vince Weaver Date: Tue, 1 May 2018 15:59:31 -0400 (EDT) X-X-Sender: vince@macbook-air To: Josh Poimboeuf cc: Peter Zijlstra , Ingo Molnar , linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , Thomas Gleixner , Andy Lutomirski Subject: Re: perf: fuzzer causes stack going in wrong direction warnings In-Reply-To: <20180501135850.enx4waqd5d7yowlj@treble> Message-ID: References: <20180109151253.GK6176@hirez.programming.kicks-ass.net> <20180109153341.GL6176@hirez.programming.kicks-ass.net> <20180109160551.GK3040@hirez.programming.kicks-ass.net> <20180109170716.bqmexpmywwr4bwuv@treble> <20180111052538.2qhj6oxnc24xumhk@treble> <20180111192112.d35nkotzklicd27c@treble> <20180501135850.enx4waqd5d7yowlj@treble> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 1 May 2018, Josh Poimboeuf wrote: > Can you try the following patch? I applied the patch, but the warnings don't really look that different. [ 62.220322] WARNING: stack recursion on stack type 4 [ 62.220326] WARNING: can't dereference registers at 000000009ca2e86d for ip swapgs_restore_regs_and_return_to_usermode+0x79/0x87 [ 367.597013] WARNING: stack going in the wrong direction? ip=native_sched_clock+0x9/0x90 Vince