6.12-stable review patch. If anyone has any objections, please let me know.
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From: Namjae Jeon linkinjeon@kernel.org
commit e2ff19f0b7a30e03516e6eb73b948e27a55bc9d2 upstream.
req->handle is allocated using ksmbd_acquire_id(&ipc_ida), based on ida_alloc. req->handle from ksmbd_ipc_login_request and FSCTL_PIPE_TRANSCEIVE ioctl can be same and it could lead to type confusion between messages, resulting in access to unexpected parts of memory after an incorrect delivery. ksmbd check type of ipc response but missing add continue to check next ipc reponse.
Cc: stable@vger.kernel.org Reported-by: Norbert Szetei norbert@doyensec.com Tested-by: Norbert Szetei norbert@doyensec.com Signed-off-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/smb/server/transport_ipc.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/smb/server/transport_ipc.c +++ b/fs/smb/server/transport_ipc.c @@ -281,6 +281,7 @@ static int handle_response(int type, voi if (entry->type + 1 != type) { pr_err("Waiting for IPC type %d, got %d. Ignore.\n", entry->type + 1, type); + continue; }
entry->response = kvzalloc(sz, GFP_KERNEL);