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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2012-08-08 00:33:25 +0000
committerDavid S. Miller <davem@davemloft.net>2012-08-08 16:06:23 -0700
commit7364e445f62825758fa61195d237a5b8ecdd06ec (patch)
tree78f93fbe4f9d04b0c547a08b4c40f78071c741eb
parent47dffc7547ed3b105dabd570ed864347687beac2 (diff)
net/core: Fix potential memory leak in dev_set_alias()
Do not leak memory by updating pointer with potentially NULL realloc return value. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/core/dev.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index f91abf8..a39354e 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1055,6 +1055,8 @@ rollback:
*/
int dev_set_alias(struct net_device *dev, const char *alias, size_t len)
{
+ char *new_ifalias;
+
ASSERT_RTNL();
if (len >= IFALIASZ)
@@ -1068,9 +1070,10 @@ int dev_set_alias(struct net_device *dev, const char *alias, size_t len)
return 0;
}
- dev->ifalias = krealloc(dev->ifalias, len + 1, GFP_KERNEL);
- if (!dev->ifalias)
+ new_ifalias = krealloc(dev->ifalias, len + 1, GFP_KERNEL);
+ if (!new_ifalias)
return -ENOMEM;
+ dev->ifalias = new_ifalias;
strlcpy(dev->ifalias, alias, len+1);
return len;