diff options
| author | Steve French <sfrench@us.ibm.com> | 2010-02-06 08:08:53 +0100 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2010-02-06 08:08:53 +0100 |
| commit | 301a6a317797ca362951ea21da397c05236f0070 (patch) | |
| tree | 14742eb9a7fe51b854a1a6bd6f3efa89c53aa51e /fs | |
| parent | cifs: fix length calculation for converted unicode readdir names (diff) | |
| download | linux-301a6a317797ca362951ea21da397c05236f0070.tar.xz linux-301a6a317797ca362951ea21da397c05236f0070.zip | |
[CIFS] Maximum username length check in session setup does not match
Fix length check reported by D. Binderman (see below)
d binderman <dcb314@hotmail.com> wrote:
>
> I just ran the sourceforge tool cppcheck over the source code of the
> new Linux kernel 2.6.33-rc6
>
> It said
>
> [./cifs/sess.c:250]: (error) Buffer access out-of-bounds
May turn out to be harmless, but best to be safe. Note max
username length is defined to 32 due to Linux (Windows
maximum is 20).
Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/cifs/sess.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index 7085a6275c4c..aaa9c1c5a5bd 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -223,9 +223,9 @@ static void unicode_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses, /* null user mount */ *bcc_ptr = 0; *(bcc_ptr+1) = 0; - } else { /* 300 should be long enough for any conceivable user name */ + } else { bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->userName, - 300, nls_cp); + MAX_USERNAME_SIZE, nls_cp); } bcc_ptr += 2 * bytes_ret; bcc_ptr += 2; /* account for null termination */ @@ -246,11 +246,10 @@ static void ascii_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses, /* copy user */ if (ses->userName == NULL) { /* BB what about null user mounts - check that we do this BB */ - } else { /* 300 should be long enough for any conceivable user name */ - strncpy(bcc_ptr, ses->userName, 300); + } else { + strncpy(bcc_ptr, ses->userName, MAX_USERNAME_SIZE); } - /* BB improve check for overflow */ - bcc_ptr += strnlen(ses->userName, 300); + bcc_ptr += strnlen(ses->userName, MAX_USERNAME_SIZE); *bcc_ptr = 0; bcc_ptr++; /* account for null termination */ |