Messages in this thread Patch in this message | | | From | Yongzhi Liu <> | Subject | [PATCH] hv_netvsc: Fix potential dereference of NULL pointer | Date | Fri, 20 May 2022 20:31:02 -0700 |
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The return value of netvsc_devinfo_get() needs to be checked to avoid use of NULL pointer in case of an allocation failure.
Fixes: 0efeea5fb ("hv_netvsc: Add the support of hibernation")
Signed-off-by: Yongzhi Liu <lyz_cs@pku.edu.cn> --- drivers/net/hyperv/netvsc_drv.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index fde1c49..b1dece6 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -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(); -- 2.7.4
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