diff options
| author | Sachin Prabhu <sprabhu@redhat.com> | 2017-03-03 15:41:38 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-08 07:47:55 +0200 |
| commit | d8fd99d4721d4a33c928ee0de8370b294a2df150 (patch) | |
| tree | 2da82ae539ed59a667cdf239848c399d28581cba /fs/cifs/cifssmb.c | |
| parent | 00cca9768ebe1ac4ac16366662dd9087b6e5f4e7 (diff) | |
Handle mismatched open calls
commit 38bd49064a1ecb67baad33598e3d824448ab11ec upstream.
A signal can interrupt a SendReceive call which result in incoming
responses to the call being ignored. This is a problem for calls such as
open which results in the successful response being ignored. This
results in an open file resource on the server.
The patch looks into responses which were cancelled after being sent and
in case of successful open closes the open fids.
For this patch, the check is only done in SendReceive2()
RH-bz: 1403319
Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Acked-by: Sachin Prabhu <sprabhu@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/cifs/cifssmb.c')
| -rw-r--r-- | fs/cifs/cifssmb.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index e3fed9249a04..586fdac05ec2 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -1423,6 +1423,8 @@ cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid) length = discard_remaining_data(server); dequeue_mid(mid, rdata->result); + mid->resp_buf = server->smallbuf; + server->smallbuf = NULL; return length; } @@ -1534,6 +1536,8 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) return cifs_readv_discard(server, mid); dequeue_mid(mid, false); + mid->resp_buf = server->smallbuf; + server->smallbuf = NULL; return length; } |