Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1260911 > unrolled thread

Re: [PATCH 1/3] recordmcount: fix endianness handling bug for nop_mcount

Back to article view | Back to linux.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  Re: [PATCH 1/3] recordmcount: fix endianness handling bug for  nop_mcount Steven Rostedt <rostedt@goodmis.org> - 2015-11-02 20:40 +0100
    [PATCH] recordmcount: fix endianness handling bug for nop_mcount libin <huawei.libin@huawei.com> - 2015-11-03 02:10 +0100

#1260911 — Re: [PATCH 1/3] recordmcount: fix endianness handling bug for nop_mcount

On Sat, 31 Oct 2015 10:07:38 +0800
libin <huawei.libin@huawei.com> wrote:

> 
> 
> on 2015/10/30 22:35, Sergei Shtylyov wrote:
> > Hello.
> > 
> > On 10/30/2015 11:31 AM, Li Bin wrote:
> > 
> >> In nop_mcount, shdr->sh_offset and welp->r_offset should handle
> >> endianness properly, otherwise it will trigger Segmentation fault
> >> if the recordmcount main and file.o have different endianness.
> >>
> >> Cc: <stable@vger.kernel.org> # 3.0+
> >> Signed-off-by: Li Bin <huawei.libin@huawei.com>
> >> ---
> >>   scripts/recordmcount.h | 5 +++--
> >>   1 file changed, 3 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
> >> index 49b582a..dda9dba 100644
> >> --- a/scripts/recordmcount.h
> >> +++ b/scripts/recordmcount.h
> >> @@ -376,8 +376,9 @@ static void nop_mcount(Elf_Shdr const *const relhdr,
> >>               mcountsym = get_mcountsym(sym0, relp, str0);
> >>
> >>           if (mcountsym == Elf_r_sym(relp) && !is_fake_mcount(relp)) {
> >> -            if (make_nop)
> >> -                ret = make_nop((void *)ehdr, shdr->sh_offset + relp->r_offset);
> >> +            if (make_nop) {
> >> +                ret = make_nop((void *)ehdr, _w(shdr->sh_offset) + _w(relp->r_offset));
> >> +            }
> > 
> >    {} not needed here.
> 
> Oh, yes. When I cleaned the debugging code, forgot delete the {}.
> 
>

Is there a new version of this patch, or should I just take this and
remove the '{}' myself?

I already added the x86 update.

-- Steve
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[toc] | [next] | [standalone]

#1261101 — [PATCH] recordmcount: fix endianness handling bug for nop_mcount

In nop_mcount, shdr->sh_offset and welp->r_offset should handle
endianness properly, otherwise it will trigger Segmentation fault
if the recordmcount main and file.o have different endianness.

Cc: <stable@vger.kernel.org> # 3.0+
Signed-off-by: Li Bin <huawei.libin@huawei.com>
---
 scripts/recordmcount.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
index 49b582a..b9897e2 100644
--- a/scripts/recordmcount.h
+++ b/scripts/recordmcount.h
@@ -377,7 +377,7 @@ static void nop_mcount(Elf_Shdr const *const relhdr,

 		if (mcountsym == Elf_r_sym(relp) && !is_fake_mcount(relp)) {
 			if (make_nop)
-				ret = make_nop((void *)ehdr, shdr->sh_offset + relp->r_offset);
+				ret = make_nop((void *)ehdr, _w(shdr->sh_offset) + _w(relp->r_offset));
 			if (warn_on_notrace_sect && !once) {
 				printf("Section %s has mcount callers being ignored\n",
 				       txtname);
-- 
1.7.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[toc] | [prev] | [standalone]

Back to top | Article view | linux.kernel

csiph-web