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Date: Mon, 18 Feb 2019 20:53:34 -0600
From: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To: Mimi Zohar <zohar@...ux.ibm.com>,
John Johansen <john.johansen@...onical.com>,
James Morris <jmorris@...ei.org>,
"Serge E. Hallyn" <serge@...lyn.com>,
Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
Casey Schaufler <casey@...aufler-ca.com>
Cc: linux-security-module@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-integrity@...r.kernel.org,
Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH v2] security: mark expected switch fall-throughs and add a
missing break
On 2/8/19 3:13 PM, Mimi Zohar wrote:
> On Fri, 2019-02-08 at 14:54 -0600, Gustavo A. R. Silva wrote:
>> In preparation to enabling -Wimplicit-fallthrough, mark switch
>> cases where we are expecting to fall through.
>>
>> This patch fixes the following warnings:
>>
>> security/integrity/ima/ima_template_lib.c:85:10: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> security/integrity/ima/ima_policy.c:940:18: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> security/integrity/ima/ima_policy.c:943:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> security/integrity/ima/ima_policy.c:972:21: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> security/integrity/ima/ima_policy.c:974:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> security/smack/smack_lsm.c:3391:9: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> security/apparmor/domain.c:569:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
>>
>> Warning level 3 was used: -Wimplicit-fallthrough=3
>>
>> Also, add a missing break statement to fix the following warning:
>>
>> security/integrity/ima/ima_appraise.c:116:26: warning: this statement may fall through [-Wimplicit-fallthrough=]
>>
>> Acked-by: John Johansen <john.johansen@...onical.com>
>> Acked-by: Casey Schaufler <casey@...aufler-ca.com>
>> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
>
> Acked-by: Mimi Zohar <zohar@...ux.ibm.com>
>
Thanks, Mimi.
--
Gustavo
>> ---
>> Changes in v2:
>> - Update Subject.
>> - Integrate a missing break in switch fix by Mimi Zohar.
>>
>> security/apparmor/domain.c | 2 +-
>> security/integrity/ima/ima_appraise.c | 1 +
>> security/integrity/ima/ima_policy.c | 4 ++++
>> security/integrity/ima/ima_template_lib.c | 1 +
>> security/smack/smack_lsm.c | 3 +--
>> 5 files changed, 8 insertions(+), 3 deletions(-)
>>
>> diff --git a/security/apparmor/domain.c b/security/apparmor/domain.c
>> index 3b266a438776..ca2dccf5b445 100644
>> --- a/security/apparmor/domain.c
>> +++ b/security/apparmor/domain.c
>> @@ -572,7 +572,7 @@ static struct aa_label *x_to_label(struct aa_profile *profile,
>> stack = NULL;
>> break;
>> }
>> - /* fall through to X_NAME */
>> + /* fall through - to X_NAME */
>> case AA_X_NAME:
>> if (xindex & AA_X_CHILD)
>> /* released by caller */
>> diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
>> index a2baa85ea2f5..5fb7127bbe68 100644
>> --- a/security/integrity/ima/ima_appraise.c
>> +++ b/security/integrity/ima/ima_appraise.c
>> @@ -114,6 +114,7 @@ static void ima_set_cache_status(struct integrity_iint_cache *iint,
>> break;
>> case CREDS_CHECK:
>> iint->ima_creds_status = status;
>> + break;
>> case FILE_CHECK:
>> case POST_SETATTR:
>> iint->ima_file_status = status;
>> diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
>> index 26fa9d9723f6..e0cc323f948f 100644
>> --- a/security/integrity/ima/ima_policy.c
>> +++ b/security/integrity/ima/ima_policy.c
>> @@ -936,10 +936,12 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
>> case Opt_uid_gt:
>> case Opt_euid_gt:
>> entry->uid_op = &uid_gt;
>> + /* fall through */
>> case Opt_uid_lt:
>> case Opt_euid_lt:
>> if ((token == Opt_uid_lt) || (token == Opt_euid_lt))
>> entry->uid_op = &uid_lt;
>> + /* fall through */
>> case Opt_uid_eq:
>> case Opt_euid_eq:
>> uid_token = (token == Opt_uid_eq) ||
>> @@ -968,9 +970,11 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
>> break;
>> case Opt_fowner_gt:
>> entry->fowner_op = &uid_gt;
>> + /* fall through */
>> case Opt_fowner_lt:
>> if (token == Opt_fowner_lt)
>> entry->fowner_op = &uid_lt;
>> + /* fall through */
>> case Opt_fowner_eq:
>> ima_log_string_op(ab, "fowner", args[0].from,
>> entry->fowner_op);
>> diff --git a/security/integrity/ima/ima_template_lib.c b/security/integrity/ima/ima_template_lib.c
>> index 43752002c222..513b457ae900 100644
>> --- a/security/integrity/ima/ima_template_lib.c
>> +++ b/security/integrity/ima/ima_template_lib.c
>> @@ -83,6 +83,7 @@ static void ima_show_template_data_ascii(struct seq_file *m,
>> /* skip ':' and '\0' */
>> buf_ptr += 2;
>> buflen -= buf_ptr - field_data->data;
>> + /* fall through */
>> case DATA_FMT_DIGEST:
>> case DATA_FMT_HEX:
>> if (!buflen)
>> diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
>> index 587dc06eba33..5c1613519d5a 100644
>> --- a/security/smack/smack_lsm.c
>> +++ b/security/smack/smack_lsm.c
>> @@ -3380,13 +3380,12 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
>> */
>> final = &smack_known_star;
>> /*
>> - * Fall through.
>> - *
>> * If a smack value has been set we want to use it,
>> * but since tmpfs isn't giving us the opportunity
>> * to set mount options simulate setting the
>> * superblock default.
>> */
>> + /* Fall through */
>> default:
>> /*
>> * This isn't an understood special case.
>
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