From mboxrd@z Thu Jan 1 00:00:00 1970 From: Josh Poimboeuf Subject: Re: WARNING: kernel stack frame pointer at ffff880156a5fea0 in bash:2103 has bad value 00007ffec7d87e50 Date: Wed, 27 Sep 2017 09:14:30 -0500 Message-ID: <20170927141430.i6awpjkyoqffof4b@treble> References: <2656822.vqnppgTvlm@blindfold> <1598510.AHGpDp18sh@blindfold> <20170926224246.mj6cxkkelc4sanda@treble> <41856500.WAzQIuoSLi@blindfold> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Cc: Alexei Starovoitov , ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@kernel.org To: Richard Weinberger Return-path: Content-Disposition: inline In-Reply-To: <41856500.WAzQIuoSLi@blindfold> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Wed, Sep 27, 2017 at 08:51:22AM +0200, Richard Weinberger wrote: > Am Mittwoch, 27. September 2017, 00:42:46 CEST schrieb Josh Poimboeuf: > > > Here is another variant of the warning, it matches the attached .config: > > I can take a look at it. Unfortunately, for these types of issues I > > often need the vmlinux file to be able to make sense of the unwinder > > dump. So if you happen to have somewhere to copy the vmlinux to, that > > would be helpful. Or if you give me your GCC version I can try to > > rebuild it locally. > > There you go: > http://git.infradead.org/~rw/bpf_splat/vmlinux.xz Thanks. Can you test this fix? diff --git a/arch/x86/kernel/kprobes/common.h b/arch/x86/kernel/kprobes/common.h index db2182d63ed0..3fc0f9a794cb 100644 --- a/arch/x86/kernel/kprobes/common.h +++ b/arch/x86/kernel/kprobes/common.h @@ -3,6 +3,15 @@ /* Kprobes and Optprobes common header */ +#include + +#ifdef CONFIG_FRAME_POINTER +# define SAVE_RBP_STRING " push %" _ASM_BP "\n" \ + " mov %" _ASM_SP ", %" _ASM_BP "\n" +#else +# define SAVE_RBP_STRING " push %" _ASM_BP "\n" +#endif + #ifdef CONFIG_X86_64 #define SAVE_REGS_STRING \ /* Skip cs, ip, orig_ax. */ \ @@ -17,7 +26,7 @@ " pushq %r10\n" \ " pushq %r11\n" \ " pushq %rbx\n" \ - " pushq %rbp\n" \ + SAVE_RBP_STRING \ " pushq %r12\n" \ " pushq %r13\n" \ " pushq %r14\n" \ @@ -48,7 +57,7 @@ " pushl %es\n" \ " pushl %ds\n" \ " pushl %eax\n" \ - " pushl %ebp\n" \ + SAVE_RBP_STRING \ " pushl %edi\n" \ " pushl %esi\n" \ " pushl %edx\n" \