diff options
| author | Namjae Jeon <linkinjeon@kernel.org> | 2024-09-23 22:39:11 +0900 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2024-09-25 21:33:14 -0500 |
| commit | d782d6e1d9078d6b82f8468dd6421050165e7d75 (patch) | |
| tree | 571dc514183088a1f4ca90a10bf73b36c73c7da6 /fs/smb | |
| parent | 8bb04fb2b7e346ffcf00164b91129ab151ceaa46 (diff) | |
ksmbd: remove unsafe_memcpy use in session setup
Kees pointed out to just use directly ->Buffer instead of pointing
->Buffer using offset not to use unsafe_memcpy().
Suggested-by: Kees Cook <kees@kernel.org>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/smb')
| -rw-r--r-- | fs/smb/server/smb2pdu.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c index 7121266daa02..72af3ab40b5c 100644 --- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -1335,8 +1335,7 @@ static int ntlm_negotiate(struct ksmbd_work *work, return rc; sz = le16_to_cpu(rsp->SecurityBufferOffset); - chgblob = - (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz); + chgblob = (struct challenge_message *)rsp->Buffer; memset(chgblob, 0, sizeof(struct challenge_message)); if (!work->conn->use_spnego) { @@ -1369,9 +1368,7 @@ static int ntlm_negotiate(struct ksmbd_work *work, goto out; } - sz = le16_to_cpu(rsp->SecurityBufferOffset); - unsafe_memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len, - /* alloc is larger than blob, see smb2_allocate_rsp_buf() */); + memcpy(rsp->Buffer, spnego_blob, spnego_blob_len); rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); out: @@ -1453,10 +1450,7 @@ static int ntlm_authenticate(struct ksmbd_work *work, if (rc) return -ENOMEM; - sz = le16_to_cpu(rsp->SecurityBufferOffset); - unsafe_memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, - spnego_blob_len, - /* alloc is larger than blob, see smb2_allocate_rsp_buf() */); + memcpy(rsp->Buffer, spnego_blob, spnego_blob_len); rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); kfree(spnego_blob); } |