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Message-Id: <20190412134512.28164-1-colin.king@canonical.com> Date: Fri, 12 Apr 2019 14:45:12 +0100 From: Colin King <colin.king@...onical.com> To: Jon Mason <jdmason@...zu.us>, "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org Cc: kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] vxge: fix return of a free'd memblock on a failed dma mapping From: Colin Ian King <colin.king@...onical.com> 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@...onical.com> --- 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 7cde387e5ec6..51cd57ab3d95 100644 --- a/drivers/net/ethernet/neterion/vxge/vxge-config.c +++ b/drivers/net/ethernet/neterion/vxge/vxge-config.c @@ -2366,6 +2366,7 @@ 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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