diff options
Diffstat (limited to 'fs/ksmbd')
| -rw-r--r-- | fs/ksmbd/smb2misc.c | 7 | ||||
| -rw-r--r-- | fs/ksmbd/smb2pdu.c | 8 |
2 files changed, 8 insertions, 7 deletions
diff --git a/fs/ksmbd/smb2misc.c b/fs/ksmbd/smb2misc.c index f8f456377a51..aa1e663d9deb 100644 --- a/fs/ksmbd/smb2misc.c +++ b/fs/ksmbd/smb2misc.c @@ -136,8 +136,11 @@ static int smb2_get_data_area_len(unsigned int *off, unsigned int *len, *len = le16_to_cpu(((struct smb2_read_req *)hdr)->ReadChannelInfoLength); break; case SMB2_WRITE: - if (((struct smb2_write_req *)hdr)->DataOffset) { - *off = le16_to_cpu(((struct smb2_write_req *)hdr)->DataOffset); + if (((struct smb2_write_req *)hdr)->DataOffset || + ((struct smb2_write_req *)hdr)->Length) { + *off = max_t(unsigned int, + le16_to_cpu(((struct smb2_write_req *)hdr)->DataOffset), + offsetof(struct smb2_write_req, Buffer)); *len = le32_to_cpu(((struct smb2_write_req *)hdr)->Length); break; } diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 43bc027a50f2..5943cb17a9b0 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -6514,14 +6514,12 @@ int smb2_write(struct ksmbd_work *work) writethrough = true; if (is_rdma_channel == false) { - if ((u64)le16_to_cpu(req->DataOffset) + length > - get_rfc1002_len(work->request_buf)) { - pr_err("invalid write data offset %u, smb_len %u\n", - le16_to_cpu(req->DataOffset), - get_rfc1002_len(work->request_buf)); + if (le16_to_cpu(req->DataOffset) < + offsetof(struct smb2_write_req, Buffer)) { err = -EINVAL; goto out; } + data_buf = (char *)(((char *)&req->hdr.ProtocolId) + le16_to_cpu(req->DataOffset)); |