2019-04-28 00:05:10 +08:00
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Yonghua Huang <yonghua.huang@intel.com>
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Date: Tue, 23 Apr 2019 01:34:01 +0800
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Subject: [PATCH] fix possible nulll pointer dereference in ACRN VHM
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Null pointer dereference will happen if 'vm' is null
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in acrn_ioreq_get_reqbuf().
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Tracked-On: projectacrn/acrn-hypervisor#1479
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Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
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Reviewed-by: Zhao Yakui <yakui.zhao@intel.com>
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Tracked-On: PKT-2115
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---
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drivers/vhm/vhm_ioreq.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/drivers/vhm/vhm_ioreq.c b/drivers/vhm/vhm_ioreq.c
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2020-10-27 02:14:06 +08:00
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index 3647d1ef1962..9deb720062c8 100644
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2019-04-28 00:05:10 +08:00
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--- a/drivers/vhm/vhm_ioreq.c
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+++ b/drivers/vhm/vhm_ioreq.c
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@@ -547,6 +547,7 @@ struct vhm_request *acrn_ioreq_get_reqbuf(int client_id)
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if (unlikely(vm == NULL || vm->req_buf == NULL)) {
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pr_warn("vhm-ioreq: the req buf page not ready yet "
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"for vmid %ld\n", client->vmid);
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+ return NULL;
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}
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acrn_ioreq_put_client(client);
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return (struct vhm_request *)vm->req_buf;
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--
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https://clearlinux.org
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