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authorRichard Alpe <richard.alpe@ericsson.com>2016-03-03 16:20:41 +0300
committerDavid S. Miller <davem@davemloft.net>2016-03-07 06:54:56 +0300
commit2837f39c7cdbd209ab04d1c1f4eca015a40d5cd6 (patch)
tree53bce102b87f076951c45814b6871b3cbd172c78 /net/tipc
parent9b3009604b8e305c32125530a3cbcc57d88f3bc1 (diff)
downloadlinux-2837f39c7cdbd209ab04d1c1f4eca015a40d5cd6.tar.xz
tipc: don't check link reset on non existing link
Make sure we have a link before checking if it has been reset or not. Prior to this patch tipc_link_is_reset() could be called with a non existing link, resulting in a null pointer dereference. Signed-off-by: Richard Alpe <richard.alpe@ericsson.com> Acked-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Erik Hugne <erik.hugne@gmail.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 cdb79503d890..590d597589cf 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -843,7 +843,7 @@ void tipc_node_check_dest(struct net *net, u32 onode,
memcpy(&le->maddr, maddr, sizeof(*maddr));
exit:
tipc_node_write_unlock(n);
- if (reset && !tipc_link_is_reset(l))
+ if (reset && l && !tipc_link_is_reset(l))
tipc_node_link_down(n, b->identity, false);
tipc_node_put(n);
}