Commit eb4c0788 authored by Yongzhi Liu's avatar Yongzhi Liu Committed by Jakub Kicinski
Browse files

hv_netvsc: Fix potential dereference of NULL pointer 



The return value of netvsc_devinfo_get()
needs to be checked to avoid use of NULL
pointer in case of an allocation failure.

Fixes: 0efeea5f ("hv_netvsc: Add the support of hibernation")
Signed-off-by: default avatarYongzhi Liu <lyz_cs@pku.edu.cn>
Reviewed-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Link: https://lore.kernel.org/r/1652962188-129281-1-git-send-email-lyz_cs@pku.edu.cn


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent ed46b3e1

drivers/net/hyperv/netvsc_drv.c

+4 −1
Original line number Diff line number Diff line
@@ -2671,7 +2671,10 @@ static int netvsc_suspend(struct hv_device *dev) 


	/* Save the current config info */

	ndev_ctx->saved_netvsc_dev_info = netvsc_devinfo_get(nvdev);



	if (!ndev_ctx->saved_netvsc_dev_info) {

		ret = -ENOMEM;

		goto out;

	}

	ret = netvsc_detach(net, nvdev);

out:

	rtnl_unlock();