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authorEric Dumazet <eric.dumazet@gmail.com>2009-06-08 03:49:24 +0000
committerDavid S. Miller <davem@davemloft.net>2009-06-09 05:11:42 -0700
commit0c27922e4933ceb86644f4a9b1af212ffe5aad75 (patch)
tree41d2add3d419269c5802c0b22e7552c3fa677eb9 /net/core
parentebc8d2ab61dde6cf775ae7bb1ed9e38dfe12ca65 (diff)
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net: dev_addr_init() fix
commit f001fde5eadd915f4858d22ed70d7040f48767cf (net: introduce a list of device addresses dev_addr_list (v6)) added one regression Vegard Nossum found in its testings. With kmemcheck help, Vegard found some uninitialized memory was read and reported to user, potentialy leaking kernel data. ( thread can be found on http://lkml.org/lkml/2009/5/30/177 ) dev_addr_init() incorrectly uses sizeof() operator. We were initializing one byte instead of MAX_ADDR_LEN bytes. Reported-by: Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Jiri Pirko <jpirko@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/dev.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 4913089..81b392e 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3655,8 +3655,8 @@ static int dev_addr_init(struct net_device *dev)
/* rtnl_mutex must be held here */
INIT_LIST_HEAD(&dev->dev_addr_list);
- memset(addr, 0, sizeof(*addr));
- err = __hw_addr_add(&dev->dev_addr_list, NULL, addr, sizeof(*addr),
+ memset(addr, 0, sizeof(addr));
+ err = __hw_addr_add(&dev->dev_addr_list, NULL, addr, sizeof(addr),
NETDEV_HW_ADDR_T_LAN);
if (!err) {
/*