summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorDan Carpenter <dan.carpenter@oracle.com>2016-01-26 12:24:25 +0300
committerDarren Hart <dvhart@linux.intel.com>2016-01-30 09:40:35 -0800
commitb1d353ad3d5835b16724653b33c05124e1b5acf1 (patch)
treea2189d9683c34f13abee3f3e573c40967509f490
parent1c319e781e0ecc48228081558f38044a11c7a76e (diff)
downloadlinux-b1d353ad3d5835b16724653b33c05124e1b5acf1.tar.bz2
intel_scu_ipcutil: underflow in scu_reg_access()
"count" is controlled by the user and it can be negative. Let's prevent that by making it unsigned. You have to have CAP_SYS_RAWIO to call this function so the bug is not as serious as it could be. Fixes: 5369c02d951a ('intel_scu_ipc: Utility driver for intel scu ipc') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: stable@vger.kernel.org Signed-off-by: Darren Hart <dvhart@linux.intel.com>
-rw-r--r--drivers/platform/x86/intel_scu_ipcutil.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/platform/x86/intel_scu_ipcutil.c b/drivers/platform/x86/intel_scu_ipcutil.c
index 02bc5a6343c3..aa454241489c 100644
--- a/drivers/platform/x86/intel_scu_ipcutil.c
+++ b/drivers/platform/x86/intel_scu_ipcutil.c
@@ -49,7 +49,7 @@ struct scu_ipc_data {
static int scu_reg_access(u32 cmd, struct scu_ipc_data *data)
{
- int count = data->count;
+ unsigned int count = data->count;
if (count == 0 || count == 3 || count > 4)
return -EINVAL;