path: root/net/batman-adv/fragmentation.c
diff options
authorSven Eckelmann <sven@narfation.org>2014-08-15 10:19:39 +0200
committerDavid S. Miller <davem@davemloft.net>2014-08-16 19:19:08 -0700
commite050dbeb0d1e19072d0d656b51f06af1af860f19 (patch)
treeca105c43b61e75c6838003abbbdd822e037b19c7 /net/batman-adv/fragmentation.c
parented607b82cad5bc72957b4c8c4b35670950c3b0de (diff)
batman-adv: Fix parameter order of hlist_add_behind
1d023284c31a4e40a94d5bbcb7dbb7a35ee0bcbc ("list: fix order of arguments for hlist_add_after(_rcu)") was incorrectly rebased on top of d9124268d84a836f14a6ead54ff9d8eee4c43be5 ("batman-adv: Fix out-of-order fragmentation support"). The parameter order change of the rebased patch was not re-applied as expected. This causes a memory leak and can cause crashes when out-of-order packets are received. hlist_add_behind will try to access the uninitalized list pointers of frag_entry_new to find the previous/next entry and may modify/read random memory locations. Signed-off-by: Sven Eckelmann <sven@narfation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/batman-adv/fragmentation.c')
1 files changed, 1 insertions, 1 deletions
diff --git a/net/batman-adv/fragmentation.c b/net/batman-adv/fragmentation.c
index 52c43f904220..fc1835c6bb40 100644
--- a/net/batman-adv/fragmentation.c
+++ b/net/batman-adv/fragmentation.c
@@ -188,7 +188,7 @@ static bool batadv_frag_insert_packet(struct batadv_orig_node *orig_node,
/* Reached the end of the list, so insert after 'frag_entry_last'. */
if (likely(frag_entry_last)) {
- hlist_add_behind(&frag_entry_last->list, &frag_entry_new->list);
+ hlist_add_behind(&frag_entry_new->list, &frag_entry_last->list);
chain->size += skb->len - hdr_size;
chain->timestamp = jiffies;
ret = true;

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