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i40iw: Add missing NULL check for MPA private data 

Add NULL check for pdata and pdata->addr before the memcpy in
i40iw_form_cm_frame(). This fixes a NULL pointer de-reference
which occurs when the MPA private data pointer is NULL. Also
only copy pdata->size bytes in the memcpy to prevent reading
past the length of the private data buffer provided by upper layer.

Fixes: f27b4746f3 ("i40iw: add connection management code")

Reported-by: Stefan Assmann <sassmann@redhat.com>
Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Shiraz Saleem 2016-08-22 18:16:37 -05:00 committed by Doug Ledford
parent cff069b78c
commit 5dfd5e5e3b
1 changed files with 2 additions and 2 deletions
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4
drivers/infiniband/hw/i40iw/i40iw_cm.c
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@ -535,8 +535,8 @@ static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node,
buf += hdr_len;
}
if (pd_len)
memcpy(buf, pdata->addr, pd_len);
if (pdata && pdata->addr)
memcpy(buf, pdata->addr, pdata->size);
atomic_set(&sqbuf->refcount, 1);