lkml.org 
[lkml]   [2020]   [Jun]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v2 06/11] ima: Fail rule parsing when the KEY_CHECK hook is combined with an invalid cond
From
Date
On 6/26/20 3:38 PM, Tyler Hicks wrote:
> The KEY_CHECK function only supports the uid, pcr, and keyrings
> conditionals. Make this clear at policy load so that IMA policy authors
> don't assume that other conditionals are supported.
>
> Fixes: 5808611cccb2 ("IMA: Add KEY_CHECK func to measure keys")
> Signed-off-by: Tyler Hicks <tyhicks@linux.microsoft.com>
> ---
>
> * v2
> - No change
>
> security/integrity/ima/ima_policy.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
> index 676d5557af1a..f9b1bdb897da 100644
> --- a/security/integrity/ima/ima_policy.c
> +++ b/security/integrity/ima/ima_policy.c
> @@ -1018,6 +1018,13 @@ static bool ima_validate_rule(struct ima_rule_entry *entry)
> if (entry->action & ~(MEASURE | DONT_MEASURE))
> return false;
>
> + if (entry->flags & ~(IMA_FUNC | IMA_UID | IMA_PCR |
> + IMA_KEYRINGS))
> + return false;
> +
> + if (ima_rule_contains_lsm_cond(entry))
> + return false;
> +
> break;
> default:
> return false;
>

Reviewed-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>

\
 
 \ /
  Last update: 2020-06-28 01:39    [W:0.204 / U:0.196 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site