From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Richard Weinberger <richard@sigma-star.at>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, mingo@kernel.org
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 [thread overview]
Message-ID: <20170927141430.i6awpjkyoqffof4b@treble> (raw)
In-Reply-To: <41856500.WAzQIuoSLi@blindfold>
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 <asm/asm.h>
+
+#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" \
next prev parent reply other threads:[~2017-09-27 14:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-25 21:23 WARNING: kernel stack frame pointer at ffff880156a5fea0 in bash:2103 has bad value 00007ffec7d87e50 Richard Weinberger
2017-09-26 4:09 ` Alexei Starovoitov
2017-09-26 21:51 ` Richard Weinberger
2017-09-26 21:59 ` Daniel Borkmann
2017-09-26 22:42 ` Josh Poimboeuf
2017-09-27 6:51 ` Richard Weinberger
2017-09-27 14:14 ` Josh Poimboeuf [this message]
2017-09-30 20:01 ` Richard Weinberger
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