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From: Dan Carpenter <dan.carpenter@oracle.com>
To: kernel-janitors@vger.kernel.org
Subject: [patch] i40e: potential array underflow in i40e_vc_process_vf_msg()
Date: Thu, 09 Jan 2014 05:31:04 +0000	[thread overview]
Message-ID: <20140109053103.GD1265@elgon.mountain> (raw)

If "vf_id" is smaller than hw->func_caps.vf_base_id then we leads to an
array underflow of the pf->vf[] array.

Fixes: 7efa84b7abc1 ('i40e: support VFs on PFs other than 0')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 55ec2db71fa1..89482a078e9d 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1698,7 +1698,7 @@ int i40e_vc_process_vf_msg(struct i40e_pf *pf, u16 vf_id, u32 v_opcode,
 			   u32 v_retval, u8 *msg, u16 msglen)
 {
 	struct i40e_hw *hw = &pf->hw;
-	int local_vf_id = vf_id - hw->func_caps.vf_base_id;
+	unsigned int local_vf_id = vf_id - hw->func_caps.vf_base_id;
 	struct i40e_vf *vf;
 	int ret;
 

             reply	other threads:[~2014-01-09  5:31 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-01-09  5:31 Dan Carpenter [this message]
2014-01-10 18:50 ` [patch] i40e: potential array underflow in i40e_vc_process_vf_msg() Williams, Mitch A
2014-01-11  1:44 ` Brown, Aaron F

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