linux-kernel - [PATCH 5.5 113/150] ice: Remove possible null dereference

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Date:   Thu, 27 Feb 2020 14:37:30 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Bruce Allan <bruce.w.allan@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Andrew Bowers <andrewx.bowers@...el.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [PATCH 5.5 113/150] ice: Remove possible null dereference

From: Tony Nguyen <anthony.l.nguyen@...el.com>

commit 0a6ea04e3bbd20833d2b49296e5adc1c5bb86386 upstream.

Commit 1f45ebe0d8fb ("ice: add extra check for null Rx descriptor") moved
the call to ice_construct_skb() under a null check as Coverity reported a
possible use of null skb. However, the original call was not deleted, do so
now.

Fixes: 1f45ebe0d8fb ("ice: add extra check for null Rx descriptor")
Reported-by: Bruce Allan <bruce.w.allan@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/ethernet/intel/ice/ice_txrx.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/net/ethernet/intel/ice/ice_txrx.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.c
@@ -1078,8 +1078,6 @@ construct_skb:
 				skb = ice_build_skb(rx_ring, rx_buf, &xdp);
 			else
 				skb = ice_construct_skb(rx_ring, rx_buf, &xdp);
-		} else {
-			skb = ice_construct_skb(rx_ring, rx_buf, &xdp);
 		}
 		/* exit if we failed to retrieve a buffer */
 		if (!skb) {