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cifs: change validate_buf to validate_iov 

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
This commit is contained in:
Ronnie Sahlberg 2018-04-09 18:06:30 +10:00 committed by Steve French
parent 05432e2938
commit c1596ff524
1 changed files with 21 additions and 18 deletions
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39
fs/cifs/smb2pdu.c
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@ -2206,13 +2206,13 @@ close_exit:
}
static int
validate_buf(unsigned int offset, unsigned int buffer_length,
struct smb2_hdr *hdr, unsigned int min_buf_size)
validate_iov(struct TCP_Server_Info *server,
unsigned int offset, unsigned int buffer_length,
struct kvec *iov, unsigned int min_buf_size)
{
unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length);
char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr;
char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
unsigned int smb_len = iov->iov_len;
char *end_of_smb = smb_len + server->vals->header_preamble_size + (char *)iov->iov_base;
char *begin_of_buf = server->vals->header_preamble_size + offset + (char *)iov->iov_base;
char *end_of_buf = begin_of_buf + buffer_length;
@ -2242,18 +2242,18 @@ validate_buf(unsigned int offset, unsigned int buffer_length,
* Caller must free buffer.
*/
static int
validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
struct smb2_hdr *hdr, unsigned int minbufsize,
validate_and_copy_iov(struct TCP_Server_Info *server,
unsigned int offset, unsigned int buffer_length,
struct kvec *iov, unsigned int minbufsize,
char *data)
{
char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr;
char *begin_of_buf = server->vals->header_preamble_size + offset + (char *)(iov->iov_base);
int rc;
if (!data)
return -EINVAL;
rc = validate_buf(offset, buffer_length, hdr, minbufsize);
rc = validate_iov(server, offset, buffer_length, iov, minbufsize);
if (rc)
return rc;
@ -2331,9 +2331,10 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon,
}
}
rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
rc = validate_and_copy_iov(ses->server,
le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength),
&rsp->hdr, min_len, *data);
&rsp_iov, min_len, *data);
qinf_exit:
free_rsp_buf(resp_buftype, rsp);
@ -3254,8 +3255,9 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
goto qdir_exit;
}
rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
rc = validate_iov(server,
le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
info_buf_size);
if (rc)
goto qdir_exit;
@ -3627,8 +3629,9 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
info = (struct smb2_fs_full_size_info *)(server->vals->header_preamble_size +
le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
rc = validate_iov(server,
le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
sizeof(struct smb2_fs_full_size_info));
if (!rc)
copy_fs_info_to_kstatfs(info, fsdata);
@ -3684,7 +3687,7 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
rsp_len = le32_to_cpu(rsp->OutputBufferLength);
offset = le16_to_cpu(rsp->OutputBufferOffset);
rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
rc = validate_iov(server, offset, rsp_len, &rsp_iov, min_len);
if (rc)
goto qfsattr_exit;