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45 lines
1.4 KiB
Diff
45 lines
1.4 KiB
Diff
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From 71fe5361cbef34e2d606b79e8936a910a3e95566 Mon Sep 17 00:00:00 2001
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From: Arun Kumar Neelakantam <aneela@codeaurora.org>
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Date: Wed, 21 Sep 2016 18:34:01 +0530
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Subject: net: ipc_router: fix NULL pointer de-reference issue
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Fail cases of accept() system call on AF_MSM_IPC socket family causes
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NULL pointer de-reference of sock structure variable in release operation.
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Validate the sock structure pointer before using it in release operation.
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CRs-Fixed: 1068888
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Change-Id: I5637e52be59ea9504ea6ae317394bef0c28c7865
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Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
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---
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net/ipc_router/ipc_router_socket.c | 10 +++++++++-
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1 file changed, 9 insertions(+), 1 deletion(-)
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diff --git a/net/ipc_router/ipc_router_socket.c b/net/ipc_router/ipc_router_socket.c
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index 828797b..652531a 100644
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--- a/net/ipc_router/ipc_router_socket.c
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+++ b/net/ipc_router/ipc_router_socket.c
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@@ -555,10 +555,18 @@ static unsigned int msm_ipc_router_poll(struct file *file,
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static int msm_ipc_router_close(struct socket *sock)
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{
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struct sock *sk = sock->sk;
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- struct msm_ipc_port *port_ptr = msm_ipc_sk_port(sk);
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+ struct msm_ipc_port *port_ptr;
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int ret;
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+ if (!sk)
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+ return -EINVAL;
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+
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lock_sock(sk);
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+ port_ptr = msm_ipc_sk_port(sk);
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+ if (!port_ptr) {
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+ release_sock(sk);
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+ return -EINVAL;
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+ }
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ret = msm_ipc_router_close_port(port_ptr);
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msm_ipc_unload_default_node(msm_ipc_sk(sk)->default_node_vote_info);
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release_sock(sk);
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--
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cgit v1.1
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