6.1-stable review patch. If anyone has any objections, please let me know.
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From: Namjae Jeon linkinjeon@kernel.org
[ Upstream commit 3a9b557f44ea8f216aab515a7db20e23f0eb51b9 ]
When smb2_lock request is canceled by smb2_cancel or smb2_close(), ksmbd is missing deleting async_request_entry async_requests list. Because calling init_smb2_rsp_hdr() in smb2_lock() mark ->synchronous as true and then it will not be deleted in ksmbd_conn_try_dequeue_request(). This patch add release_async_work() to release the ones allocated for async work.
Cc: stable@vger.kernel.org Signed-off-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/smb/server/connection.c | 12 +++++------- fs/smb/server/ksmbd_work.h | 2 +- fs/smb/server/smb2pdu.c | 33 +++++++++++++++++++++------------ fs/smb/server/smb2pdu.h | 1 + 4 files changed, 28 insertions(+), 20 deletions(-)
diff --git a/fs/smb/server/connection.c b/fs/smb/server/connection.c index ffbf14d024191..00a87b4acd5c5 100644 --- a/fs/smb/server/connection.c +++ b/fs/smb/server/connection.c @@ -114,10 +114,8 @@ void ksmbd_conn_enqueue_request(struct ksmbd_work *work) struct ksmbd_conn *conn = work->conn; struct list_head *requests_queue = NULL;
- if (conn->ops->get_cmd_val(work) != SMB2_CANCEL_HE) { + if (conn->ops->get_cmd_val(work) != SMB2_CANCEL_HE) requests_queue = &conn->requests; - work->synchronous = true; - }
if (requests_queue) { atomic_inc(&conn->req_running); @@ -138,14 +136,14 @@ int ksmbd_conn_try_dequeue_request(struct ksmbd_work *work)
if (!work->multiRsp) atomic_dec(&conn->req_running); - spin_lock(&conn->request_lock); if (!work->multiRsp) { + spin_lock(&conn->request_lock); list_del_init(&work->request_entry); - if (!work->synchronous) - list_del_init(&work->async_request_entry); + spin_unlock(&conn->request_lock); + if (work->asynchronous) + release_async_work(work); ret = 0; } - spin_unlock(&conn->request_lock);
wake_up_all(&conn->req_running_q); return ret; diff --git a/fs/smb/server/ksmbd_work.h b/fs/smb/server/ksmbd_work.h index 3234f2cf6327c..f8ae6144c0aea 100644 --- a/fs/smb/server/ksmbd_work.h +++ b/fs/smb/server/ksmbd_work.h @@ -68,7 +68,7 @@ struct ksmbd_work { /* Request is encrypted */ bool encrypted:1; /* Is this SYNC or ASYNC ksmbd_work */ - bool synchronous:1; + bool asynchronous:1; bool need_invalidate_rkey:1;
unsigned int remote_key; diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c index d3939fd481497..ee128f5d38c35 100644 --- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -508,12 +508,6 @@ int init_smb2_rsp_hdr(struct ksmbd_work *work) rsp_hdr->SessionId = rcv_hdr->SessionId; memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
- work->synchronous = true; - if (work->async_id) { - ksmbd_release_id(&conn->async_ida, work->async_id); - work->async_id = 0; - } - return 0; }
@@ -671,7 +665,7 @@ int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) pr_err("Failed to alloc async message id\n"); return id; } - work->synchronous = false; + work->asynchronous = true; work->async_id = id; rsp_hdr->Id.AsyncId = cpu_to_le64(id);
@@ -691,6 +685,24 @@ int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) return 0; }
+void release_async_work(struct ksmbd_work *work) +{ + struct ksmbd_conn *conn = work->conn; + + spin_lock(&conn->request_lock); + list_del_init(&work->async_request_entry); + spin_unlock(&conn->request_lock); + + work->asynchronous = 0; + work->cancel_fn = NULL; + kfree(work->cancel_argv); + work->cancel_argv = NULL; + if (work->async_id) { + ksmbd_release_id(&conn->async_ida, work->async_id); + work->async_id = 0; + } +} + void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) { struct smb2_hdr *rsp_hdr; @@ -7153,13 +7165,9 @@ int smb2_lock(struct ksmbd_work *work)
ksmbd_vfs_posix_lock_wait(flock);
- spin_lock(&work->conn->request_lock); spin_lock(&fp->f_lock); list_del(&work->fp_entry); - work->cancel_fn = NULL; - kfree(argv); spin_unlock(&fp->f_lock); - spin_unlock(&work->conn->request_lock);
if (work->state != KSMBD_WORK_ACTIVE) { list_del(&smb_lock->llist); @@ -7177,6 +7185,7 @@ int smb2_lock(struct ksmbd_work *work) work->send_no_response = 1; goto out; } + init_smb2_rsp_hdr(work); smb2_set_err_rsp(work); rsp->hdr.Status = @@ -7189,7 +7198,7 @@ int smb2_lock(struct ksmbd_work *work) spin_lock(&work->conn->llist_lock); list_del(&smb_lock->clist); spin_unlock(&work->conn->llist_lock); - + release_async_work(work); goto retry; } else if (!rc) { spin_lock(&work->conn->llist_lock); diff --git a/fs/smb/server/smb2pdu.h b/fs/smb/server/smb2pdu.h index f13bd65993ccc..59e3de95961c1 100644 --- a/fs/smb/server/smb2pdu.h +++ b/fs/smb/server/smb2pdu.h @@ -488,6 +488,7 @@ int find_matching_smb2_dialect(int start_index, __le16 *cli_dialects, struct file_lock *smb_flock_init(struct file *f); int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg); +void release_async_work(struct ksmbd_work *work); void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status); struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn);