mISDN: fix possible memory leak in hfcmulti_init()

hc has been allocated in this function and missing free it before
leaving from some 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: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
index 5e402cf2e795..f02794203bb1 100644
--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -5059,6 +5059,7 @@ hfcmulti_init(struct hm_map *m, struct pci_dev *pdev,
                                 printk(KERN_INFO
                                        "HFC-E1 #%d has overlapping B-channels on fragment #%d\n",
                                        E1_cnt + 1, pt);
+                                kfree(hc);
                                 return -EINVAL;
                         }
                         maskcheck |= hc->bmask[pt];
@@ -5086,6 +5087,7 @@ hfcmulti_init(struct hm_map *m, struct pci_dev *pdev,
         if ((poll >> 1) > sizeof(hc->silence_data)) {
                 printk(KERN_ERR "HFCMULTI error: silence_data too small, "
                        "please fix\n");
+                kfree(hc);
                 return -EINVAL;
         }
         for (i = 0; i < (poll >> 1); i++)