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Date:   Tue,  7 May 2019 01:34:56 -0400
From:   Sasha Levin <>
Cc:     Colin Ian King <>,
        "David S . Miller" <>,
        Sasha Levin <>,
Subject: [PATCH AUTOSEL 4.19 25/81] vxge: fix return of a free'd memblock on a failed dma mapping

From: Colin Ian King <>

[ Upstream commit 0a2c34f18c94b596562bf3d019fceab998b8b584 ]

Currently if a pci dma mapping failure is detected a free'd
memblock address is returned rather than a NULL (that indicates
an error). Fix this by ensuring NULL is returned on this error case.

Addresses-Coverity: ("Use after free")
Fixes: 528f727279ae ("vxge: code cleanup and reorganization")
Signed-off-by: Colin Ian King <>
Signed-off-by: David S. Miller <>
Signed-off-by: Sasha Levin <>
 drivers/net/ethernet/neterion/vxge/vxge-config.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/neterion/vxge/vxge-config.c b/drivers/net/ethernet/neterion/vxge/vxge-config.c
index bf4302e45dcd..28f765664702 100644
--- a/drivers/net/ethernet/neterion/vxge/vxge-config.c
+++ b/drivers/net/ethernet/neterion/vxge/vxge-config.c
@@ -2365,6 +2365,7 @@ static void *__vxge_hw_blockpool_malloc(struct __vxge_hw_device *devh, u32 size,
 				dma_object->addr))) {
 			vxge_os_dma_free(devh->pdev, memblock,
+			memblock = NULL;
 			goto exit;

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