linux-kernel - [GIT] bugfix for IMA code

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Date:	Sat, 30 Nov 2013 13:25:31 +1100 (EST)
From:	James Morris <jmorris@...ei.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [GIT] bugfix for IMA code

This fixes another regression in the IMA code.

Please pull.

The following changes since commit dc1ccc48159d63eca5089e507c82c7d22ef60839:

  Linux 3.13-rc2 (2013-11-29 12:57:14 -0800)

are available in the git repository at:
  git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git for-linus

Roberto Sassu (1):
      ima: store address of template_fmt_copy in a pointer before calling strsep

 security/integrity/ima/ima_template.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
commit af91706d5ddecb4a9858cca9e90d463037cfd498
Author: Roberto Sassu <roberto.sassu@...ito.it>
Date:   Wed Nov 27 14:40:41 2013 +0100

    ima: store address of template_fmt_copy in a pointer before calling strsep
    
    This patch stores the address of the 'template_fmt_copy' variable in a new
    variable, called 'template_fmt_ptr', so that the latter is passed as an
    argument of strsep() instead of the former. This modification is needed
    in order to correctly free the memory area referenced by
    'template_fmt_copy' (strsep() modifies the pointer of the passed string).
    
    Signed-off-by: Roberto Sassu <roberto.sassu@...ito.it>
    Reported-by: Sebastian Ott <sebott@...ux.vnet.ibm.com>
    Signed-off-by: Mimi Zohar <zohar@...ibm.com>
    Signed-off-by: James Morris <james.l.morris@...cle.com>

---

diff --git a/security/integrity/ima/ima_template.c b/security/integrity/ima/ima_template.c
index 913e192..635695f 100644
--- a/security/integrity/ima/ima_template.c
+++ b/security/integrity/ima/ima_template.c
@@ -110,7 +110,7 @@ static int template_desc_init_fields(const char *template_fmt,
 				     struct ima_template_field ***fields,
 				     int *num_fields)
 {
-	char *c, *template_fmt_copy;
+	char *c, *template_fmt_copy, *template_fmt_ptr;
 	int template_num_fields = template_fmt_size(template_fmt);
 	int i, result = 0;
 
@@ -127,7 +127,9 @@ static int template_desc_init_fields(const char *template_fmt,
 		result = -ENOMEM;
 		goto out;
 	}
-	for (i = 0; (c = strsep(&template_fmt_copy, "|")) != NULL &&
+
+	template_fmt_ptr = template_fmt_copy;
+	for (i = 0; (c = strsep(&template_fmt_ptr, "|")) != NULL &&
 	     i < template_num_fields; i++) {
 		struct ima_template_field *f = lookup_template_field(c);
 
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