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| author | Tomas Winkler <tomas.winkler@intel.com> | 2013-05-07 21:12:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-21 10:07:54 -0700 |
| commit | 80fe6361540fd7e0a38326b02b4f2a5e68c99d0a (patch) | |
| tree | 975befccae8d0e395cc96c1ed92a60aaa56e6ab5 | |
| parent | 6220d6a05089220d913701416ab9423af23cd1bb (diff) | |
| download | linux-80fe6361540fd7e0a38326b02b4f2a5e68c99d0a.tar.gz linux-80fe6361540fd7e0a38326b02b4f2a5e68c99d0a.tar.bz2 linux-80fe6361540fd7e0a38326b02b4f2a5e68c99d0a.zip | |
mei: fix out of array access to me clients array
The patch 9f81abdac362: "mei: implement mei_cl_connect function"
from Jan 8, 2013, leads to the following static checker warning:
"drivers/misc/mei/main.c:522 mei_ioctl_connect_client()
warn: check 'dev->me_clients[]' for negative offsets (-2)"
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/misc/mei/main.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 7c44c8dbae42..053139f61086 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -489,11 +489,16 @@ static int mei_ioctl_connect_client(struct file *file, /* find ME client we're trying to connect to */ i = mei_me_cl_by_uuid(dev, &data->in_client_uuid); - if (i >= 0 && !dev->me_clients[i].props.fixed_address) { - cl->me_client_id = dev->me_clients[i].client_id; - cl->state = MEI_FILE_CONNECTING; + if (i < 0 || dev->me_clients[i].props.fixed_address) { + dev_dbg(&dev->pdev->dev, "Cannot connect to FW Client UUID = %pUl\n", + &data->in_client_uuid); + rets = -ENODEV; + goto end; } + cl->me_client_id = dev->me_clients[i].client_id; + cl->state = MEI_FILE_CONNECTING; + dev_dbg(&dev->pdev->dev, "Connect to FW Client ID = %d\n", cl->me_client_id); dev_dbg(&dev->pdev->dev, "FW Client - Protocol Version = %d\n", @@ -527,11 +532,6 @@ static int mei_ioctl_connect_client(struct file *file, goto end; } - if (cl->state != MEI_FILE_CONNECTING) { - rets = -ENODEV; - goto end; - } - /* prepare the output buffer */ client = &data->out_client_properties; @@ -543,7 +543,6 @@ static int mei_ioctl_connect_client(struct file *file, rets = mei_cl_connect(cl, file); end: - dev_dbg(&dev->pdev->dev, "free connect cb memory."); return rets; } |