linux-kernel - module bustage - git v2.6.29-9516-g0221c81 and tip v2.6.29-10558-g44f4bd6 unbootable

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Date:	Mon, 06 Apr 2009 11:08:48 +0200
From:	Mike Galbraith <efault@....de>
To:	rusty <rusty@...tcorp.com.au>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>
Subject: module bustage - git v2.6.29-9516-g0221c81 and tip
	v2.6.29-10558-g44f4bd6 unbootable

Hi Rusty,

The below rendered modules unloadable, and my bog standard opensuse 11.0
x86_64 box became a doorstop.

module-init-tools version 3.4, config attached.

(nobody else has griped yet and it's already 11:08.  hm)

commit 9cb610d8e35fe3ec95a2fe2030b02f85aeea83c1
Author: Rusty Russell <rusty@...tcorp.com.au>
Date:   Tue Mar 31 13:05:33 2009 -0600

    module: remove the SHF_ALLOC flag on the __versions section.
    
    Impact: reduce kernel memory usage
    
    This patch just takes off the SHF_ALLOC flag on __versions so we don't
    keep them around after module load.
    
    This saves about 7% of module memory if CONFIG_MODVERSIONS=y.
    
    Cc: Shawn Bohrer <shawn.bohrer@...il.com>
    Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>

diff --git a/kernel/module.c b/kernel/module.c
index 599fc85..784bf6d 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1961,6 +1961,9 @@ static noinline struct module *load_module(void __user *umod,
 		if (strncmp(secstrings+sechdrs[i].sh_name, ".exit", 5) == 0)
 			sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC;
 #endif
+		/* Don't keep __versions around; it's just for loading. */
+		if (strcmp(secstrings + sechdrs[i].sh_name, "__versions") == 0)
+			sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC;
 	}
 
 	modindex = find_sec(hdr, sechdrs, secstrings,


Download attachment "config.gz" of type "application/x-gzip" (14788 bytes)