[Linux-ima-devel] [PATCH v4 5/5] ima: remove permit_directio policy option

[Dmitry Kasatkin]

Looks good to me.

On Wed, Jul 26, 2017 at 4:22 PM, Mimi Zohar <zohar at linux.vnet.ibm.com> wrote:
> With the new ->integrity_read file_operations method support, files
> opened with the O_DIRECT flag should work properly.  This patch
> reverts commit f9b2a735bddd "ima: audit log files opened with O_DIRECT
> flag".
>
> Signed-off-by: Mimi Zohar <zohar at linux.vnet.ibm.com>
> ---
>  Documentation/ABI/testing/ima_policy | 2 +-
>  security/integrity/ima/ima_api.c     | 6 ------
>  security/integrity/ima/ima_main.c    | 5 +----
>  security/integrity/ima/ima_policy.c  | 8 +-------
>  security/integrity/integrity.h       | 1 -
>  5 files changed, 3 insertions(+), 19 deletions(-)
>
> diff --git a/Documentation/ABI/testing/ima_policy b/Documentation/ABI/testing/ima_policy
> index f271207743e5..441a78e7b87e 100644
> --- a/Documentation/ABI/testing/ima_policy
> +++ b/Documentation/ABI/testing/ima_policy
> @@ -24,7 +24,7 @@ Description:
>                                 [euid=] [fowner=]]
>                         lsm:    [[subj_user=] [subj_role=] [subj_type=]
>                                  [obj_user=] [obj_role=] [obj_type=]]
> -                       option: [[appraise_type=]] [permit_directio]
> +                       option: [[appraise_type=]]
>
>                 base:   func:= [BPRM_CHECK][MMAP_CHECK][FILE_CHECK][MODULE_CHECK]
>                                 [FIRMWARE_CHECK]
> diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c
> index bbf3ba8bbb09..7bc8e76c06f5 100644
> --- a/security/integrity/ima/ima_api.c
> +++ b/security/integrity/ima/ima_api.c
> @@ -210,12 +210,6 @@ int ima_collect_measurement(struct integrity_iint_cache *iint,
>         if (iint->flags & IMA_COLLECTED)
>                 goto out;
>
> -       if (file->f_flags & O_DIRECT) {
> -               audit_cause = "failed(directio)";
> -               result = -EACCES;
> -               goto out;
> -       }
> -
>         i_version = file_inode(file)->i_version;
>         hash.hdr.algo = algo;
>
> diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
> index 664edab0f758..9b8ede84337f 100644
> --- a/security/integrity/ima/ima_main.c
> +++ b/security/integrity/ima/ima_main.c
> @@ -240,11 +240,8 @@ static int process_measurement(struct file *file, char *buf, loff_t size,
>         hash_algo = ima_get_hash_algo(xattr_value, xattr_len);
>
>         rc = ima_collect_measurement(iint, file, buf, size, hash_algo);
> -       if (rc != 0 && rc != -EBADF && rc != -EINVAL) {
> -               if (file->f_flags & O_DIRECT)
> -                       rc = (iint->flags & IMA_PERMIT_DIRECTIO) ? 0 : -EACCES;
> +       if (rc != 0 && rc != -EBADF && rc != -EINVAL)
>                 goto out_digsig;
> -       }
>
>         if (!pathbuf)   /* ima_rdwr_violation possibly pre-fetched */
>                 pathname = ima_d_path(&file->f_path, &pathbuf, filename);
> diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
> index cddd9dfb01e1..3b54fb32e837 100644
> --- a/security/integrity/ima/ima_policy.c
> +++ b/security/integrity/ima/ima_policy.c
> @@ -545,7 +545,7 @@ enum {
>         Opt_fsuuid, Opt_uid_eq, Opt_euid_eq, Opt_fowner_eq,
>         Opt_uid_gt, Opt_euid_gt, Opt_fowner_gt,
>         Opt_uid_lt, Opt_euid_lt, Opt_fowner_lt,
> -       Opt_appraise_type, Opt_permit_directio,
> +       Opt_appraise_type,
>         Opt_pcr, Opt_dont_failsafe
>  };
>
> @@ -575,7 +575,6 @@ static match_table_t policy_tokens = {
>         {Opt_euid_lt, "euid<%s"},
>         {Opt_fowner_lt, "fowner<%s"},
>         {Opt_appraise_type, "appraise_type=%s"},
> -       {Opt_permit_directio, "permit_directio"},
>         {Opt_pcr, "pcr=%s"},
>         {Opt_dont_failsafe, "dont_failsafe"},
>         {Opt_err, NULL}
> @@ -892,9 +891,6 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
>                         else
>                                 result = -EINVAL;
>                         break;
> -               case Opt_permit_directio:
> -                       entry->flags |= IMA_PERMIT_DIRECTIO;
> -                       break;
>                 case Opt_pcr:
>                         if (entry->action != MEASURE) {
>                                 result = -EINVAL;
> @@ -1179,8 +1175,6 @@ int ima_policy_show(struct seq_file *m, void *v)
>         }
>         if (entry->flags & IMA_DIGSIG_REQUIRED)
>                 seq_puts(m, "appraise_type=imasig ");
> -       if (entry->flags & IMA_PERMIT_DIRECTIO)
> -               seq_puts(m, "permit_directio ");
>         rcu_read_unlock();
>         seq_puts(m, "\n");
>         return 0;
> diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h
> index a53e7e4ab06c..790f07e515a7 100644
> --- a/security/integrity/integrity.h
> +++ b/security/integrity/integrity.h
> @@ -31,7 +31,6 @@
>  #define IMA_ACTION_RULE_FLAGS  0x06000000
>  #define IMA_DIGSIG             0x01000000
>  #define IMA_DIGSIG_REQUIRED    0x02000000
> -#define IMA_PERMIT_DIRECTIO    0x04000000
>  #define IMA_NEW_FILE           0x08000000
>
>  #define IMA_DO_MASK            (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT | \
> --
> 2.7.4
>
>
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-- 
Thanks,
Dmitry
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