3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexey Khoroshilov <khoroshi...@ispras.ru>
[ Upstream commit 7364e445f62825758fa61195d237a5b8ecdd06ec ]
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 <khoroshi...@ispras.ru>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
net/core/dev.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1056,6 +1056,8 @@ rollback:
*/
int dev_set_alias(struct net_device *dev, const char *alias, size_t len)
{
+ char *new_ifalias;
+
ASSERT_RTNL();
if (len >= IFALIASZ)
@@ -1069,9 +1071,10 @@ int dev_set_alias(struct net_device *dev
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;
--
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