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-rw-r--r--sys/security/mac/mac_internal.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/security/mac/mac_internal.h b/sys/security/mac/mac_internal.h
index 700b029..db3ade9 100644
--- a/sys/security/mac/mac_internal.h
+++ b/sys/security/mac/mac_internal.h
@@ -1176,7 +1176,8 @@ static int
mac_check_structmac_consistent(struct mac *mac)
{
- if (mac->m_buflen > MAC_MAX_LABEL_BUF_LEN)
+ if (mac->m_buflen < 0 ||
+ mac->m_buflen > MAC_MAX_LABEL_BUF_LEN)
return (EINVAL);
return (0);
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