netdev - [PATCH net] ice: Fix a couple off by one bugs

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Date:   Fri, 31 Jan 2020 07:56:59 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Henry Tieman <henry.w.tieman@...el.com>,
        intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH net] ice: Fix a couple off by one bugs

The hw->blk[blk]->es.ref_count[] array has hw->blk[blk].es.count
elements.  It gets allocated in ice_init_hw_tbls().  So the > should be
>= to prevent accessing one element beyond the end of the array.

Fixes: 2c61054c5fda ("ice: Optimize table usage")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 drivers/net/ethernet/intel/ice/ice_flex_pipe.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_flex_pipe.c b/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
index 99208946224c..38a7041fe774 100644
--- a/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
+++ b/drivers/net/ethernet/intel/ice/ice_flex_pipe.c
@@ -1950,7 +1950,7 @@ ice_free_prof_id(struct ice_hw *hw, enum ice_block blk, u8 prof_id)
 static enum ice_status
 ice_prof_inc_ref(struct ice_hw *hw, enum ice_block blk, u8 prof_id)
 {
-	if (prof_id > hw->blk[blk].es.count)
+	if (prof_id >= hw->blk[blk].es.count)
 		return ICE_ERR_PARAM;
 
 	hw->blk[blk].es.ref_count[prof_id]++;
@@ -1991,7 +1991,7 @@ ice_write_es(struct ice_hw *hw, enum ice_block blk, u8 prof_id,
 static enum ice_status
 ice_prof_dec_ref(struct ice_hw *hw, enum ice_block blk, u8 prof_id)
 {
-	if (prof_id > hw->blk[blk].es.count)
+	if (prof_id >= hw->blk[blk].es.count)
 		return ICE_ERR_PARAM;
 
 	if (hw->blk[blk].es.ref_count[prof_id] > 0) {
-- 
2.11.0