[PATCH] kernel: auditfilter: looping issue, memory leak if has 2or more AUDIT_FILTERKEYs

[Chen Gang]

  in the 'fcount' looping,
    if 'new->fields[*].type" has 2 or more AUDIT_FILTERKEYs
    need judge new->filterkey whether has value, or memory leak.

Signed-off-by: Chen Gang <gang.chen@xxxxxxxxxxx>
---
 kernel/auditfilter.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index f9fc54b..936ac79 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -859,6 +859,8 @@ struct audit_entry *audit_dupe_rule(struct audit_krule *old)
 						       &old->fields[i]);
 			break;
 		case AUDIT_FILTERKEY:
+			if (new->filterkey)
+				break;
 			fk = kstrdup(old->filterkey, GFP_KERNEL);
 			if (unlikely(!fk))
 				err = -ENOMEM;
-- 
1.7.7.6
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