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| author | Roland Dreier <roland@eddore.topspincom.com> | 2005-09-09 20:52:00 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2005-09-09 20:52:00 -0700 |
| commit | 1b205c2d2464bfecbba80227e74b412596dc5521 (patch) | |
| tree | 8c22c14bd8b2c6cde19bd05b5cbbc1c88b64152a | |
| parent | 354ba39cf96e439149541acf3c6c7c0df0a3ef25 (diff) | |
| download | op-kernel-dev-1b205c2d2464bfecbba80227e74b412596dc5521.zip op-kernel-dev-1b205c2d2464bfecbba80227e74b412596dc5521.tar.gz | |
[PATCH] IB: fix CM use-after-free
If the CM REQ handling function gets to error2, then it frees
cm_id_priv->timewait_info. But the next line goes through
ib_destroy_cm_id() -> ib_send_cm_rej() -> cm_reset_to_idle(),
which ends up calling cm_cleanup_timewait(), which dereferences the
pointer we just freed. Make sure we clear cm_id_priv->timewait_info
after freeing it, so that doesn't happen.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
| -rw-r--r-- | drivers/infiniband/core/cm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index 9613654..54db6d4 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -1315,6 +1315,7 @@ error3: atomic_dec(&cm_id_priv->refcount); cm_deref_id(listen_cm_id_priv); cm_cleanup_timewait(cm_id_priv->timewait_info); error2: kfree(cm_id_priv->timewait_info); + cm_id_priv->timewait_info = NULL; error1: ib_destroy_cm_id(&cm_id_priv->id); return ret; } |
