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: 0efeea5fb1
("hv_netvsc: Add the support of hibernation")
Signed-off-by: Yongzhi Liu <lyz_cs@pku.edu.cn>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Link: https://lore.kernel.org/r/1652962188-129281-1-git-send-email-lyz_cs@pku.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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parent
ed46b3e127
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@ -2671,7 +2671,10 @@ static int netvsc_suspend(struct hv_device *dev)
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/* Save the current config info */
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/* Save the current config info */
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ndev_ctx->saved_netvsc_dev_info = netvsc_devinfo_get(nvdev);
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ndev_ctx->saved_netvsc_dev_info = netvsc_devinfo_get(nvdev);
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if (!ndev_ctx->saved_netvsc_dev_info) {
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ret = -ENOMEM;
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goto out;
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}
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ret = netvsc_detach(net, nvdev);
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ret = netvsc_detach(net, nvdev);
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out:
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out:
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rtnl_unlock();
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rtnl_unlock();
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