lkml.org 
[lkml]   [2009]   [Aug]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/2] module: workaround duplicate section names
On Wed, Aug 26, 2009 at 10:04:12PM +0930, Rusty Russell wrote:
>From: James Bottomley <James.Bottomley@HansenPartnership.com>
>
>(This patch leaves other problems, particularly the sections
> directory, but recent parisc toolchains seem to produce these
> modules and this prevents a crash and is a minimal change -- RR).
>
>The root cause is a duplicate section name (.text); is this legal?

AFAIK, yes.


>
>However, there's a problem with commit
>6d76013381ed28979cd122eb4b249a88b5e384fa in that if you fail to allocate
>a mod->sect_attrs (in this case it's null because of the duplication),
>it still gets used without checking in add_notes_attrs()
>
>This should fix it
>
>Signed-off-by: James Bottomley <James.Bottomley@suse.de>
>Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
>Tested-by: Helge Deller <deller@gmx.de>

Looks fine for me.

Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com>

Thanks.


>---
>
>diff --git a/kernel/module.c b/kernel/module.c
>index fd14114..a703c49 100644
>--- a/kernel/module.c
>+++ b/kernel/module.c
>@@ -2353,7 +2353,8 @@ static noinline struct module *load_module(void __user *umod,
> if (err < 0)
> goto unlink;
> add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
>- add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
>+ if (mod->sect_attrs)
>+ add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
>
> /* Get rid of temporary copy */
> vfree(hdr);
>--
>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/


\
 
 \ /
  Last update: 2009-08-27 06:53    [W:0.065 / U:0.020 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site