| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 031/113] vxge: fix return of a freed memblock on a failed dma mapping | Date | Wed, 15 May 2019 12:55:22 +0200 |
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[ 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 <colin.king@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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 bf4302e45dcd9..28f7656647027 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, &dma_object->acc_handle); + memblock = NULL; goto exit; } -- 2.20.1
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