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Date: Tue, 29 Sep 2020 12:58:04 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Pan Bian <bianpan2016@....com>, Jason Gunthorpe <jgg@...lanox.com>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 4.19 033/245] RDMA/i40iw: Fix potential use after free From: Pan Bian <bianpan2016@....com> [ Upstream commit da046d5f895fca18d63b15ac8faebd5bf784e23a ] Release variable dst after logging dst->error to avoid possible use after free. Link: https://lore.kernel.org/r/1573022651-37171-1-git-send-email-bianpan2016@163.com Signed-off-by: Pan Bian <bianpan2016@....com> Reviewed-by: Jason Gunthorpe <jgg@...lanox.com> Signed-off-by: Jason Gunthorpe <jgg@...lanox.com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/infiniband/hw/i40iw/i40iw_cm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.c b/drivers/infiniband/hw/i40iw/i40iw_cm.c index 4321b9e3dbb4b..0273d0404e740 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_cm.c +++ b/drivers/infiniband/hw/i40iw/i40iw_cm.c @@ -2071,9 +2071,9 @@ static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev, dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr); if (!dst || dst->error) { if (dst) { - dst_release(dst); i40iw_pr_err("ip6_route_output returned dst->error = %d\n", dst->error); + dst_release(dst); } return rc; } -- 2.25.1
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