kernel/kdbus-connection-fix-handling-of-failed-fget.patch
2015-07-08 10:30:06 -04:00

37 lines
1.1 KiB
Diff

From: Daniel Mack <daniel@zonque.org>
Date: Tue, 17 Mar 2015 19:48:24 +0100
Subject: [PATCH] kdbus: connection: fix handling of failed fget()
The patch 5fc8dd5c84fc: "kdbus: add connection, queue handling and
message validation code" from Sep 11, 2014, leads to the following
static checker warning:
ipc/kdbus/connection.c:2000 kdbus_cmd_send()
warn: 'cancel_fd' isn't an ERR_PTR
Fix this by checking for NULL pointers returned from fget().
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
ipc/kdbus/connection.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/ipc/kdbus/connection.c b/ipc/kdbus/connection.c
index e554f1a71aa1..ab476fa9ccca 100644
--- a/ipc/kdbus/connection.c
+++ b/ipc/kdbus/connection.c
@@ -1997,9 +1997,8 @@ int kdbus_cmd_send(struct kdbus_conn *conn, struct file *f, void __user *argp)
if (argv[1].item) {
cancel_fd = fget(argv[1].item->fds[0]);
- if (IS_ERR(cancel_fd)) {
- ret = PTR_ERR(cancel_fd);
- cancel_fd = NULL;
+ if (!cancel_fd) {
+ ret = -EBADF;
goto exit;
}