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| author |   Krishna Kumar <krkumar2@in.ibm.com> | 2006-11-09 09:30:34 +0530 |
|---|---|---|
| committer |   Roland Dreier <rolandd@cisco.com> | 2006-11-29 15:33:07 -0800 |
| commit | 33ba0fa9f315ce32fbb86fa671c131f5355b52a1 (patch) | |
| tree | 3b6bd7f9efe82fe4e7298497c312b9ee71f4911c /drivers/infiniband/core/iwcm.c | |
| parent | IB: Convert kmem_cache_t -> struct kmem_cache (diff) | |
| download | linux-dev-33ba0fa9f315ce32fbb86fa671c131f5355b52a1.tar.xz linux-dev-33ba0fa9f315ce32fbb86fa671c131f5355b52a1.zip | |
RDMA/iwcm: Fix memory corruption bug in cm_work_handler()
Possible memory corruption scenario: after putting the work entry back
on the work_free_list, we call process_event() which dereferences
work->event, which could have been modified to another value
meanwhile.
Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/core/iwcm.c')
| -rw-r--r-- | drivers/infiniband/core/iwcm.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/infiniband/core/iwcm.c b/drivers/infiniband/core/iwcm.c index 2bbcfa5c6e27..22d498c9a68b 100644 --- a/drivers/infiniband/core/iwcm.c +++ b/drivers/infiniband/core/iwcm.c @@ -829,7 +829,8 @@ static int process_event(struct iwcm_id_private *cm_id_priv, */ static void cm_work_handler(void *arg) { - struct iwcm_work *work = arg, lwork; + struct iwcm_work *work = arg; + struct iw_cm_event levent; struct iwcm_id_private *cm_id_priv = work->cm_id; unsigned long flags; int empty; @@ -842,11 +843,11 @@ static void cm_work_handler(void *arg) struct iwcm_work, list); list_del_init(&work->list); empty = list_empty(&cm_id_priv->work_list); - lwork = *work; + levent = work->event; put_work(work); spin_unlock_irqrestore(&cm_id_priv->lock, flags); - ret = process_event(cm_id_priv, &work->event); + ret = process_event(cm_id_priv, &levent); if (ret) { set_bit(IWCM_F_CALLBACK_DESTROY, &cm_id_priv->flags); destroy_cm_id(&cm_id_priv->id); |