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| author | Yongzhi Liu <lyz_cs@pku.edu.cn> | 2022-05-19 05:09:48 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-05-20 17:45:31 -0700 |
| commit | eb4c0788964730d12e8dd520bd8f5217ca48321c (patch) | |
| tree | 1e508e859be2a71ed11bf49682781ee18325f5df /drivers/net/hyperv | |
| parent | ed46b3e1272d6e5c79c8333a60115003035cfbd4 (diff) | |
| download | linux-eb4c0788964730d12e8dd520bd8f5217ca48321c.tar.bz2 | |
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: 0efeea5fb153 ("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>
Diffstat (limited to 'drivers/net/hyperv')
| -rw-r--r-- | drivers/net/hyperv/netvsc_drv.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index fde1c492ca02..b1dece6b9698 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(); |