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| author | Paulo Alcantara <pc@cjr.nz> | 2022-05-25 07:37:04 -0500 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2022-05-25 07:41:22 -0500 |
| commit | de3a9e943ddecba8d2ac1dde4cfff538e5c6a7b9 (patch) | |
| tree | 6cc5c2567bfbdb3155662c166020189c473be525 /fs/cifs/sess.c | |
| parent | d87c48ce4d8951f46d21f17ea86bba8853049862 (diff) | |
| download | linux-de3a9e943ddecba8d2ac1dde4cfff538e5c6a7b9.tar.gz linux-de3a9e943ddecba8d2ac1dde4cfff538e5c6a7b9.tar.bz2 linux-de3a9e943ddecba8d2ac1dde4cfff538e5c6a7b9.zip | |
cifs: fix ntlmssp on old servers
Some older servers seem to require the workstation name during ntlmssp
to be at most 15 chars (RFC1001 name length), so truncate it before
sending when using insecure dialects.
Link: https://lore.kernel.org/r/e6837098-15d9-acb6-7e34-1923cf8c6fe1@winds.org
Reported-by: Byron Stanoszek <gandalf@winds.org>
Tested-by: Byron Stanoszek <gandalf@winds.org>
Fixes: 49bd49f983b5 ("cifs: send workstation name during ntlmssp session setup")
Cc: stable@vger.kernel.org
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/sess.c')
| -rw-r--r-- | fs/cifs/sess.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index 7c453f8701eb..c6214cfc575f 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -741,9 +741,9 @@ static int size_of_ntlmssp_blob(struct cifs_ses *ses, int base_size) else sz += sizeof(__le16); - if (ses->workstation_name) + if (ses->workstation_name[0]) sz += sizeof(__le16) * strnlen(ses->workstation_name, - CIFS_MAX_WORKSTATION_LEN); + ntlmssp_workstation_name_size(ses)); else sz += sizeof(__le16); @@ -987,7 +987,7 @@ int build_ntlmssp_auth_blob(unsigned char **pbuffer, cifs_security_buffer_from_str(&sec_blob->WorkstationName, ses->workstation_name, - CIFS_MAX_WORKSTATION_LEN, + ntlmssp_workstation_name_size(ses), *pbuffer, &tmp, nls_cp); |