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AppArmor: Fix splitting an fqname into separate namespace and profile names

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As per Dan Carpenter <error27@gmail.com>
  If we have a ns name without a following profile then in the original
  code it did "*ns_name = &name[1];".  "name" is NULL so "*ns_name" is
  0x1.  That isn't useful and could cause an oops when this function is
  called from aa_remove_profiles().

Beyond this the assignment of the namespace name was wrong in the case
where the profile name was provided as it was being set to &name[1]
after name  = skip_spaces(split + 1);

Move the ns_name assignment before updating name for the split and
also add skip_spaces, making the interface more robust.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
John Johansen 2010-08-27 18:33:28 -07:00 committed by James Morris
parent 3a2dc8382a
commit 04ccd53f09
1 changed files with 1 additions and 1 deletions
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2
security/apparmor/lib.c
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@ -40,6 +40,7 @@ char *aa_split_fqname(char *fqname, char **ns_name)
*ns_name = NULL;
if (name[0] == ':') {
char *split = strchr(&name[1], ':');
*ns_name = skip_spaces(&name[1]);
if (split) {
/* overwrite ':' with \0 */
*split = 0;
@ -47,7 +48,6 @@ char *aa_split_fqname(char *fqname, char **ns_name)
} else
/* a ns name without a following profile is allowed */
name = NULL;
*ns_name = &name[1];
}
if (name && *name == 0)
name = NULL;