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-rw-r--r--fs/cifs/cifs_spnego.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c
index 7013aaff6aed..2434ab0e8791 100644
--- a/fs/cifs/cifs_spnego.c
+++ b/fs/cifs/cifs_spnego.c
@@ -66,8 +66,8 @@ struct key_type cifs_spnego_key_type = {
.describe = user_describe,
};
-#define MAX_VER_STR_LEN 9 /* length of longest version string e.g.
- strlen(";ver=0xFF") */
+#define MAX_VER_STR_LEN 8 /* length of longest version string e.g.
+ strlen("ver=0xFF") */
#define MAX_MECH_STR_LEN 13 /* length of longest security mechanism name, eg
in future could have strlen(";sec=ntlmsspi") */
#define MAX_IPV6_ADDR_LEN 42 /* eg FEDC:BA98:7654:3210:FEDC:BA98:7654:3210/60 */
@@ -81,11 +81,15 @@ cifs_get_spnego_key(struct cifsSesInfo *sesInfo)
struct key *spnego_key;
const char *hostname = server->hostname;
- /* BB: come up with better scheme for determining length */
- /* length of fields (with semicolons): ver=0xyz ipv4= ipaddress host=
- hostname sec=mechanism uid=0x uid */
- desc_len = MAX_VER_STR_LEN + 5 + MAX_IPV6_ADDR_LEN + 1 + 6 +
- strlen(hostname) + MAX_MECH_STR_LEN + 8 + (sizeof(uid_t) * 2);
+ /* length of fields (with semicolons): ver=0xyz ip4=ipaddress
+ host=hostname sec=mechanism uid=0xFF user=username */
+ desc_len = MAX_VER_STR_LEN +
+ 6 /* len of "host=" */ + strlen(hostname) +
+ 5 /* len of ";ipv4=" */ + MAX_IPV6_ADDR_LEN +
+ MAX_MECH_STR_LEN +
+ 7 /* len of ";uid=0x" */ + (sizeof(uid_t) * 2) +
+ 6 /* len of ";user=" */ + strlen(sesInfo->userName) + 1;
+
spnego_key = ERR_PTR(-ENOMEM);
description = kzalloc(desc_len, GFP_KERNEL);
if (description == NULL)