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mei: fix potential read outside of array bounds 

Drop not-very-useful check and with this
fix read on index that can be after array end.
Cleanup search function as byproduct.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Alexander Usyskin 2014-02-17 15:13:22 +02:00 committed by Greg Kroah-Hartman
parent 64092858ac
commit a27a76d3c0
1 changed files with 10 additions and 13 deletions
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23
drivers/misc/mei/client.c
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@ -29,20 +29,21 @@
* mei_me_cl_by_uuid - locate index of me client
*
* @dev: mei device
*
* Locking: called under "dev->device_lock" lock
*
* returns me client index or -ENOENT if not found
*/
int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *uuid)
{
int i, res = -ENOENT;
int i;
for (i = 0; i < dev->me_clients_num; ++i)
if (uuid_le_cmp(*uuid,
dev->me_clients[i].props.protocol_name) == 0) {
res = i;
break;
}
dev->me_clients[i].props.protocol_name) == 0)
return i;
return res;
return -ENOENT;
}
@ -60,16 +61,12 @@ int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *uuid)
int mei_me_cl_by_id(struct mei_device *dev, u8 client_id)
{
int i;
for (i = 0; i < dev->me_clients_num; i++)
if (dev->me_clients[i].client_id == client_id)
break;
if (WARN_ON(dev->me_clients[i].client_id != client_id))
return -ENOENT;
return i;
if (i == dev->me_clients_num)
return -ENOENT;
return i;
return -ENOENT;
}