Shrink stack space usage in cifs_construct_tcon
We were reserving MAX_USERNAME (now 256) on stack for
something which only needs to fit about 24 bytes ie
string krb50x + printf version of uid
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 6e211b6..108a1e99 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -274,7 +274,8 @@
int capabilities;
char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
TCP names - will ipv6 and sctp addresses fit? */
- char *user_name;
+ char *user_name; /* must not be null except during init of sess
+ and after mount option parsing we fill it */
char *domainName;
char *password;
struct session_key auth_key;
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 68b7dbf..8d72acb 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3258,7 +3258,9 @@
struct cifsSesInfo *ses;
struct cifsTconInfo *tcon = NULL;
struct smb_vol *vol_info;
- char username[MAX_USERNAME_SIZE + 1];
+ char username[28]; /* big enough for "krb50x" + hex of ULONG_MAX 6+16 */
+ /* We used to have this as MAX_USERNAME which is */
+ /* way too big now (256 instead of 32) */
vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
if (vol_info == NULL) {