x86: convert to generic helpers for IPI function calls

[linux-2.6-omap-h63xx.git] / fs / cifs / asn1.c

diff --git a/fs/cifs/asn1.c b/fs/cifs/asn1.c
index cb52cbbe45ff4704790ec4ffbf0a985e3423f492..f58e41d3ba485d97bbf57726e7087d5ec6db1d63 100644 (file)
--- a/fs/cifs/asn1.c
+++ b/fs/cifs/asn1.c
@@ -186,6 +186,11 @@ asn1_length_decode(struct asn1_ctx *ctx, unsigned int *def, unsigned int *len)
                        }
                }
        }
+
+       /* don't trust len bigger than ctx buffer */
+       if (*len > ctx->end - ctx->pointer)
+               return 0;
+
        return 1;
 }
 
@@ -203,6 +208,10 @@ asn1_header_decode(struct asn1_ctx *ctx,
        if (!asn1_length_decode(ctx, &def, &len))
                return 0;
 
+       /* primitive shall be definite, indefinite shall be constructed */
+       if (*con == ASN1_PRI && !def)
+               return 0;
+
        if (def)
                *eoc = ctx->pointer + len;
        else
@@ -389,6 +398,11 @@ asn1_oid_decode(struct asn1_ctx *ctx,
        unsigned long *optr;
 
        size = eoc - ctx->pointer + 1;
+
+       /* first subid actually encodes first two subids */
+       if (size < 2 || size > ULONG_MAX/sizeof(unsigned long))
+               return 0;
+
        *oid = kmalloc(size * sizeof(unsigned long), GFP_ATOMIC);
        if (*oid == NULL)
                return 0;