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authorErik Hugne <erik.hugne@ericsson.com>2014-04-28 08:20:09 +0200
committerDavid S. Miller <davem@davemloft.net>2014-04-28 14:43:35 -0400
commitd7bb74c38cb3de40600dcbba50a4f84df290dc91 (patch)
treec8c320eb97da04533e2c8e7f1e81bb4f3ee92376 /net/tipc
parentd37556eb1cb76b5e2320fc1ea94dfab29fce878c (diff)
downloadlinux-d7bb74c38cb3de40600dcbba50a4f84df290dc91.tar.bz2
tipc: fix out of bounds indexing
Commit 78acb1f9b898e85fa2c1e28e700b54b66b288e8d ("tipc: add ioctl to fetch link names") introduced a buffer overflow bug where specially crafted ioctl requests could cause out-of-bounds indexing of the node->links array. This was caused by an incorrect check vs MAX_BEARERS, and the static code checker complaint is: net/tipc/node.c:459 tipc_node_get_linkname() error: buffer overflow 'node->links' 2 <= 2 Signed-off-by: Erik Hugne <erik.hugne@ericsson.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc')
-rw-r--r--net/tipc/node.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 1f938f3dba4b..6d6543e88c2c 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -453,7 +453,7 @@ int tipc_node_get_linkname(u32 bearer_id, u32 addr, char *linkname, size_t len)
struct tipc_link *link;
struct tipc_node *node = tipc_node_find(addr);
- if ((bearer_id > MAX_BEARERS) || !node)
+ if ((bearer_id >= MAX_BEARERS) || !node)
return -EINVAL;
tipc_node_lock(node);
link = node->links[bearer_id];