memory corruption in X.25 facilities parsing

[lisovros/linux_canprio.git] / net / x25 / x25_facilities.c

diff --git a/net/x25/x25_facilities.c b/net/x25/x25_facilities.c
index 771bab00754b0baff1a5c7a95892028857c8b84d..3a8c4c419cd4051ce0ce7a586b3d93417f768cb2 100644 (file)
--- a/net/x25/x25_facilities.c
+++ b/net/x25/x25_facilities.c
@@ -134,15 +134,15 @@ int x25_parse_facilities(struct sk_buff *skb, struct x25_facilities *facilities,
                case X25_FAC_CLASS_D:
                        switch (*p) {
                        case X25_FAC_CALLING_AE:
-                               if (p[1] > X25_MAX_DTE_FACIL_LEN)
-                                       break;
+                               if (p[1] > X25_MAX_DTE_FACIL_LEN || p[1] <= 1)
+                                       return 0;
                                dte_facs->calling_len = p[2];
                                memcpy(dte_facs->calling_ae, &p[3], p[1] - 1);
                                *vc_fac_mask |= X25_MASK_CALLING_AE;
                                break;
                        case X25_FAC_CALLED_AE:
-                               if (p[1] > X25_MAX_DTE_FACIL_LEN)
-                                       break;
+                               if (p[1] > X25_MAX_DTE_FACIL_LEN || p[1] <= 1)
+                                       return 0;
                                dte_facs->called_len = p[2];
                                memcpy(dte_facs->called_ae, &p[3], p[1] - 1);
                                *vc_fac_mask |= X25_MASK_CALLED_AE;