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CIFS: Fix possible memory leaks in SMB2 code 

and add missed increments of failed async read and write requests.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
This commit is contained in:
Pavel Shilovsky 2012-09-19 16:03:26 +04:00 committed by Steve French
parent e4e3703555
commit e5d0488719
1 changed files with 14 additions and 9 deletions
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23
fs/cifs/smb2pdu.c
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@ -1218,13 +1218,13 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon,
iov[0].iov_len = get_rfc1002_length(req) + 4;
rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
if (rc) {
cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
goto qinf_exit;
}
rsp = (struct smb2_query_info_rsp *)iov[0].iov_base;
rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength),
&rsp->hdr, min_len, data);
@ -1485,8 +1485,10 @@ smb2_async_readv(struct cifs_readdata *rdata)
rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
cifs_readv_receive, smb2_readv_callback,
rdata, 0);
if (rc)
if (rc) {
kref_put(&rdata->refcount, cifs_readdata_release);
cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
}
cifs_small_buf_release(buf);
return rc;
@ -1643,8 +1645,10 @@ smb2_async_writev(struct cifs_writedata *wdata)
rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
smb2_writev_callback, wdata, 0);
if (rc)
if (rc) {
kref_put(&wdata->refcount, cifs_writedata_release);
cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
}
async_writev_out:
cifs_small_buf_release(req);
@ -1700,15 +1704,15 @@ SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
&resp_buftype, 0);
rsp = (struct smb2_write_rsp *)iov[0].iov_base;
if (rc) {
cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
cERROR(1, "Send error in write = %d", rc);
} else {
rsp = (struct smb2_write_rsp *)iov[0].iov_base;
} else
*nbytes = le32_to_cpu(rsp->DataLength);
free_rsp_buf(resp_buftype, rsp);
}
free_rsp_buf(resp_buftype, rsp);
return rc;
}
@ -1828,11 +1832,12 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
inc_rfc1001_len(req, len - 1 /* Buffer */);
rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0);
rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
if (rc) {
cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
goto qdir_exit;
}
rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,