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| author | Chen Gang <gang.chen@asianux.com> | 2013-07-19 03:01:36 +0200 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2013-07-31 06:54:40 +0200 |
| commit | 057d6332b24a4497c55a761c83c823eed9e3f23b (patch) | |
| tree | 15ad5c70288bc61084fd01c2f9b0db208d581c12 /fs/cifs/connect.c | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net (diff) | |
| download | linux-057d6332b24a4497c55a761c83c823eed9e3f23b.tar.xz linux-057d6332b24a4497c55a761c83c823eed9e3f23b.zip | |
cifs: extend the buffer length enought for sprintf() using
For cifs_set_cifscreds() in "fs/cifs/connect.c", 'desc' buffer length
is 'CIFSCREDS_DESC_SIZE' (56 is less than 256), and 'ses->domainName'
length may be "255 + '\0'".
The related sprintf() may cause memory overflow, so need extend related
buffer enough to hold all things.
It is also necessary to be sure of 'ses->domainName' must be less than
256, and define the related macro instead of hard code number '256'.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Scott Lovenberg <scott.lovenberg@gmail.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/connect.c')
| -rw-r--r-- | fs/cifs/connect.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index fa68813396b5..d67c550c4980 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -1675,7 +1675,8 @@ cifs_parse_mount_options(const char *mountdata, const char *devname, if (string == NULL) goto out_nomem; - if (strnlen(string, 256) == 256) { + if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN) + == CIFS_MAX_DOMAINNAME_LEN) { printk(KERN_WARNING "CIFS: domain name too" " long\n"); goto cifs_parse_mount_err; @@ -2276,8 +2277,8 @@ cifs_put_smb_ses(struct cifs_ses *ses) #ifdef CONFIG_KEYS -/* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */ -#define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1) +/* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */ +#define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1) /* Populate username and pw fields from keyring if possible */ static int |