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vxge: fix return of a free'd memblock on a failed dma mapping

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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: 528f727279 ("vxge: code cleanup and reorganization")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Colin Ian King 2019-04-12 14:45:12 +01:00 committed by David S. Miller
parent bddc028a4f
commit 0a2c34f18c
1 changed files with 1 additions and 0 deletions
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1
drivers/net/ethernet/neterion/vxge/vxge-config.c
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@ -2366,6 +2366,7 @@ static void *__vxge_hw_blockpool_malloc(struct __vxge_hw_device *devh, u32 size,
dma_object->addr))) { dma_object->addr))) {
vxge_os_dma_free(devh->pdev, memblock, vxge_os_dma_free(devh->pdev, memblock,
&dma_object->acc_handle); &dma_object->acc_handle);
memblock = NULL;
goto exit; goto exit;
} }