Fix dst_neigh_lookup/dst_neigh_lookup_skb return value handling bug
authorZhouyi Zhou <zhouzhouyi@gmail.com>
Thu, 14 Mar 2013 17:21:50 +0000 (17:21 +0000)
committerDavid S. Miller <davem@davemloft.net>
Fri, 15 Mar 2013 13:06:58 +0000 (09:06 -0400)
commitaaa0c23cb90141309f5076ba5e3bfbd39544b985
treeb6aa0989e463fbc803474c077e5a3ab512017024
parent1e731cb986d564c4938bcba89ff5f4aea1d8e2fb
Fix dst_neigh_lookup/dst_neigh_lookup_skb return value handling bug

When neighbour table is full, dst_neigh_lookup/dst_neigh_lookup_skb will return
-ENOBUFS which is absolutely non zero, while all the code in kernel which use
above functions assume failure only on zero return which will cause panic. (for
example: : https://bugzilla.kernel.org/show_bug.cgi?id=54731).

This patch corrects above error with smallest changes to kernel source code and
also correct two return value check missing bugs in drivers/infiniband/hw/cxgb4/cm.c

Tested on my x86_64 SMP machine

Reported-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Tested-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Signed-off-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/infiniband/hw/cxgb4/cm.c
include/net/dst.h