diff options
| author |   Ralph Campbell <ralph.campbell@qlogic.com> | 2008-07-22 14:18:33 -0700 |
|---|---|---|
| committer |   Roland Dreier <rolandd@cisco.com> | 2008-07-22 14:18:33 -0700 |
| commit | 64b784b583061ebfe1d484dd1fdc5a26c6d4293f (patch) | |
| tree | 2eef2e4af37b00a6ab9c4bf2d2d60dffce980204 /drivers/infiniband | |
| parent | markers: fix duplicate modpost entry (diff) | |
| download | linux-dev-64b784b583061ebfe1d484dd1fdc5a26c6d4293f.tar.xz linux-dev-64b784b583061ebfe1d484dd1fdc5a26c6d4293f.zip | |
IB/sa_query: Check if sm_ah is NULL in ib_sa_remove_one()
If update_sm_ah() fails, it leaves the port's sm_ah as NULL. Then if
the device or module is removed, ib_sa_remove_one() will dereference a
NULL pointer when it calls kref_put(). Fix this by testing if sm_ah
is NULL before dropping the reference.
Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/core/sa_query.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c index 1341de793e51..7863a50d56f2 100644 --- a/drivers/infiniband/core/sa_query.c +++ b/drivers/infiniband/core/sa_query.c @@ -1064,7 +1064,8 @@ static void ib_sa_remove_one(struct ib_device *device) for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) { ib_unregister_mad_agent(sa_dev->port[i].agent); - kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); + if (sa_dev->port[i].sm_ah) + kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); } kfree(sa_dev); |