SFR reported this 2013-05-15:
> After merging the final tree, today's linux-next build (i386 defconfig)
> produced this warning:
>
> kernel/auditfilter.c: In function 'audit_data_to_entry':
> kernel/auditfilter.c:426:3: warning: this decimal constant is unsigned only
> in ISO C90 [enabled by default]
>
> Introduced by commit 780a7654cee8 ("audit: Make testing for a valid
> loginuid explicit") from Linus' tree.
Replace this decimal constant in the code with a macro to make it more readable
and add an unsigned cast to quiet the warning.
Cc: stable@xxxxxxxxxxxxxxx # v3.9
Cc: Eric Paris <eparis@xxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Signed-off-by: Richard Guy Briggs <rgb@xxxxxxxxxx>
---
include/uapi/linux/audit.h | 2 ++
kernel/auditfilter.c | 2 +-
2 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
index 75cef3f..b7cb978 100644
--- a/include/uapi/linux/audit.h
+++ b/include/uapi/linux/audit.h
@@ -374,6 +374,8 @@ struct audit_tty_status {
__u32 log_passwd; /* 1 = enabled, 0 = disabled */
};
+#define AUDIT_UID_UNSET (unsigned int)-1
+
/* audit_rule_data supports filter rules with both integer and string
* fields. It corresponds with AUDIT_ADD_RULE, AUDIT_DEL_RULE and
* AUDIT_LIST_RULES requests.
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index bc6595f..0d40b51 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -423,7 +423,7 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
f->lsm_rule = NULL;
/* Support legacy tests for a valid loginuid */
- if ((f->type == AUDIT_LOGINUID) && (f->val == 4294967295)) {
+ if ((f->type == AUDIT_LOGINUID) && (f->val == AUDIT_UID_UNSET)) {
f->type = AUDIT_LOGINUID_SET;
f->val = 0;
}
--
1.7.1
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