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| author | Jack Morgenstein <jackm@dev.mellanox.co.il> | 2007-11-26 10:41:19 +0200 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-11-27 15:40:10 -0800 |
| commit | 1401b53acc0328d96bacb2a3393d2852699df96b (patch) | |
| tree | 1f6ac801ec6c4c5b8ced21cd55449212ecd93dd1 /drivers/infiniband | |
| parent | 7749c902592f610dc448830210174ab922f54be9 (diff) | |
| download | blackbird-op-linux-1401b53acc0328d96bacb2a3393d2852699df96b.tar.gz blackbird-op-linux-1401b53acc0328d96bacb2a3393d2852699df96b.zip | |
IPoIB: Fix oops if xmit is called when priv->broadcast is NULL
If a port goes down, ipoib_ib_dev_down() is invoked -- which flushes
the mcasts (clearing priv->broadcast) and clearing the path record
cache. If ipoib_start_xmit() is then invoked (before the broadcast
group is rejoined), a kernel oops results from attempting to access
priv->broadcast, which is still unset.
Returning NULL from path_rec_create() if priv->broadcast is NULL is a
harmless way of bypassing the problem -- the offending packet is
simply discarded "without prejudice."
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_main.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index a03a65ebcf0c..c9f6077b615e 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -460,6 +460,9 @@ static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid) struct ipoib_dev_priv *priv = netdev_priv(dev); struct ipoib_path *path; + if (!priv->broadcast) + return NULL; + path = kzalloc(sizeof *path, GFP_ATOMIC); if (!path) return NULL; |
