提交 089a1bed 编写于 作者: R Roland Dreier

[IB] ib_umad: fix crash when freeing send buffers

The conversion of user_mad.c to the new MAD send API was slightly off:
in a few places, we used packet->msg instead of packet->msg->mad when
referring to the actual data buffer, which ended up corrupting the
underlying data structure and crashing when we free an invalid pointer.
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
上级 3d155f8c
......@@ -398,12 +398,12 @@ static ssize_t ib_umad_write(struct file *filp, const char __user *buf,
* transaction ID matches the agent being used to send the
* MAD.
*/
method = ((struct ib_mad_hdr *) packet->msg)->method;
method = ((struct ib_mad_hdr *) packet->msg->mad)->method;
if (!(method & IB_MGMT_METHOD_RESP) &&
method != IB_MGMT_METHOD_TRAP_REPRESS &&
method != IB_MGMT_METHOD_SEND) {
tid = &((struct ib_mad_hdr *) packet->msg)->tid;
tid = &((struct ib_mad_hdr *) packet->msg->mad)->tid;
*tid = cpu_to_be64(((u64) agent->hi_tid) << 32 |
(be64_to_cpup(tid) & 0xffffffff));
}
......
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