staging: bcm: fix possible memory leak in bcm_char_ioctl()

psFwInfo has been allocated in this function and should be
freed before leaving from the error handling cases.

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/bcm/Bcmchar.c b/drivers/staging/bcm/Bcmchar.c
index cf411d1..3d02c2e 100644 (file)
--- a/drivers/staging/bcm/Bcmchar.c
+++ b/drivers/staging/bcm/Bcmchar.c
@@ -820,6 +820,7 @@ cntrlEnd:
 
                if (copy_from_user(psFwInfo, IoBuffer.InputBuffer, IoBuffer.InputLength)) {
                        up(&Adapter->fw_download_sema);
+                       kfree(psFwInfo);
                        return -EFAULT;
                }
 
@@ -829,6 +830,7 @@ cntrlEnd:
                        BCM_DEBUG_PRINT(Adapter, DBG_TYPE_PRINTK, 0, 0, "Something else is wrong %lu\n",
                                        psFwInfo->u32FirmwareLength);
                        up(&Adapter->fw_download_sema);
+                       kfree(psFwInfo);
                        Status = -EINVAL;
                        return Status;
                }