[PATCH] ima/policy: fix parsing of fsuuid

[PATCH] ima/policy: fix parsing of fsuuid

[Mike Rapoport]

The switch to uuid_t invereted the logic of verfication that &entry->fsuuid
is zero during parsing of "fsuuid=" rule. Instead of making sure the
&entry->fsuuid field is not attempted to be overwriten, we bail out for
perfectly correct rule.

Fixes: 787d8c530af7 ("ima/policy: switch to use uuid_t")

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
---
 security/integrity/ima/ima_policy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index ee4613fa5840..f19f4841a97a 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -743,7 +743,7 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
 		case Opt_fsuuid:
 			ima_log_string(ab, "fsuuid", args[0].from);
 
-			if (uuid_is_null(&entry->fsuuid)) {
+			if (!uuid_is_null(&entry->fsuuid)) {
 				result = -EINVAL;
 				break;
 			}
-- 
2.7.4

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[PATCH] ima/policy: fix parsing of fsuuid

[Greg KH]

On Wed, Jan 17, 2018 at 08:27:11PM +0200, Mike Rapoport wrote:
> The switch to uuid_t invereted the logic of verfication that &entry->fsuuid
> is zero during parsing of "fsuuid=" rule. Instead of making sure the
> &entry->fsuuid field is not attempted to be overwriten, we bail out for
> perfectly correct rule.
> 
> Fixes: 787d8c530af7 ("ima/policy: switch to use uuid_t")
> 
> Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
> ---
>  security/integrity/ima/ima_policy.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>
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[PATCH] ima/policy: fix parsing of fsuuid

[Mimi Zohar]

On Wed, 2018-01-17 at 20:27 +0200, Mike Rapoport wrote:
> The switch to uuid_t invereted the logic of verfication that &entry->fsuuid
> is zero during parsing of "fsuuid=" rule. Instead of making sure the
> &entry->fsuuid field is not attempted to be overwriten, we bail out for
> perfectly correct rule.
> 
> Fixes: 787d8c530af7 ("ima/policy: switch to use uuid_t")
> 
> Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>

Thanks, Mike.

> ---
>  security/integrity/ima/ima_policy.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
> index ee4613fa5840..f19f4841a97a 100644
> --- a/security/integrity/ima/ima_policy.c
> +++ b/security/integrity/ima/ima_policy.c
> @@ -743,7 +743,7 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
>  		case Opt_fsuuid:
>  			ima_log_string(ab, "fsuuid", args[0].from);
> 
> -			if (uuid_is_null(&entry->fsuuid)) {
> +			if (!uuid_is_null(&entry->fsuuid)) {
>  				result = -EINVAL;
>  				break;
>  			}

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