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| author | Jeff Layton <jlayton@redhat.com> | 2012-01-17 16:09:15 -0500 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2012-01-17 22:40:26 -0600 |
| commit | 04febabcf55beeffb8794a0d8c539e571bd2ae29 (patch) | |
| tree | 8727fdf5c811bab3d164293488cd5e1a3816276c /fs/cifs/cifs_spnego.c | |
| parent | 9f6ed2ca257fa8650b876377833e6f14e272848b (diff) | |
| download | linux-04febabcf55beeffb8794a0d8c539e571bd2ae29.tar.gz linux-04febabcf55beeffb8794a0d8c539e571bd2ae29.tar.bz2 linux-04febabcf55beeffb8794a0d8c539e571bd2ae29.zip | |
cifs: sanitize username handling
Currently, it's not very clear whether you're allowed to have a NULL
vol->username or ses->user_name. Some places check for it and some don't.
Make it clear that a NULL pointer is OK in these fields, and ensure that
all the callers check for that.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/cifs_spnego.c')
| -rw-r--r-- | fs/cifs/cifs_spnego.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c index 2272fd5fe5b7..e622863b292f 100644 --- a/fs/cifs/cifs_spnego.c +++ b/fs/cifs/cifs_spnego.c @@ -113,9 +113,11 @@ cifs_get_spnego_key(struct cifs_ses *sesInfo) MAX_MECH_STR_LEN + UID_KEY_LEN + (sizeof(uid_t) * 2) + CREDUID_KEY_LEN + (sizeof(uid_t) * 2) + - USER_KEY_LEN + strlen(sesInfo->user_name) + PID_KEY_LEN + (sizeof(pid_t) * 2) + 1; + if (sesInfo->user_name) + desc_len += USER_KEY_LEN + strlen(sesInfo->user_name); + spnego_key = ERR_PTR(-ENOMEM); description = kzalloc(desc_len, GFP_KERNEL); if (description == NULL) @@ -152,8 +154,10 @@ cifs_get_spnego_key(struct cifs_ses *sesInfo) dp = description + strlen(description); sprintf(dp, ";creduid=0x%x", sesInfo->cred_uid); - dp = description + strlen(description); - sprintf(dp, ";user=%s", sesInfo->user_name); + if (sesInfo->user_name) { + dp = description + strlen(description); + sprintf(dp, ";user=%s", sesInfo->user_name); + } dp = description + strlen(description); sprintf(dp, ";pid=0x%x", current->pid); |