Commit b861fb76 authored by Lihong Yang's avatar Lihong Yang Committed by Jeff Kirsher

i40e: add check for return from find_first_bit call

The find_first_bit function will return the size passed to search
if the first set bit is not found. This patch adds the check in case
that happens as the return value would be used as the index in an array
and that would have caused the out-of-bounds access.

Detected by CoverityScan, CID 1295969 Out-of-bounds access
Signed-off-by: default avatarLihong Yang <lihong.yang@intel.com>
Tested-by: default avatarAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 6f853d4f
......@@ -306,6 +306,10 @@ static void i40e_config_irq_link_list(struct i40e_vf *vf, u16 vsi_id,
next_q = find_first_bit(&linklistmap,
(I40E_MAX_VSI_QP *
I40E_VIRTCHNL_SUPPORTED_QTYPES));
if (unlikely(next_q == (I40E_MAX_VSI_QP *
I40E_VIRTCHNL_SUPPORTED_QTYPES)))
goto irq_list_done;
vsi_queue_id = next_q / I40E_VIRTCHNL_SUPPORTED_QTYPES;
qtype = next_q % I40E_VIRTCHNL_SUPPORTED_QTYPES;
pf_queue_id = i40e_vc_get_pf_queue_id(vf, vsi_id, vsi_queue_id);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment